broadcasting moar

Reviewed-on: #1

.gitignore

@@ -3,8 +3,6 @@
 *.iws
 *.ipr
 *.iml
-*.ipr
-*.iws
 *~
 .vscode
 .metals
@@ -27,4 +25,6 @@ spark-warehouse
 /**/job-override.properties
 /**/*.log
 /**/.factorypath
-
+/**/.scalafmt.conf
+/.java-version
+/dhp-shade-package/dependency-reduced-pom.xml

.scalafmt.conf

@@ -0,0 +1,21 @@
+style = defaultWithAlign
+
+align.openParenCallSite = false
+align.openParenDefnSite = false
+align.tokens = [{code = "->"}, {code = "<-"}, {code = "=>", owner = "Case"}]
+continuationIndent.callSite = 2
+continuationIndent.defnSite = 2
+danglingParentheses = true
+indentOperator = spray
+maxColumn = 120
+newlines.alwaysBeforeTopLevelStatements = true
+project.excludeFilters = [".*\\.sbt"]
+rewrite.rules = [AvoidInfix]
+rewrite.rules = [ExpandImportSelectors]
+rewrite.rules = [RedundantBraces]
+rewrite.rules = [RedundantParens]
+rewrite.rules = [SortImports]
+rewrite.rules = [SortModifiers]
+rewrite.rules = [PreferCurlyFors]
+spaces.inImportCurlyBraces = false
+unindentTopLevelOperators = true

CODE_OF_CONDUCT.md

@@ -0,0 +1,43 @@
+# Contributor Code of Conduct
+
+Openness, transparency and our community-driven participatory approach guide us in our day-to-day interactions and decision-making. Our open source projects are no exception. Trust, respect, collaboration and transparency are core values we believe should live and breathe within our projects. Our community welcomes participants from around the world with different experiences, unique perspectives, and great ideas to share.
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Attempting collaboration before conflict
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+- Violence, threats of violence, or inciting others to commit self-harm
+- The use of sexualized language or imagery and unwelcome sexual attention or advances
+- Trolling, intentionally spreading misinformation, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or electronic address, without explicit permission
+- Abuse of the reporting process to intentionally harass or exclude others
+- Advocating for, or encouraging, any of the above behavior
+- Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org/), [version 1.4](https://www.contributor-covenant.org/version/1/4/code-of-conduct.html).

CONTRIBUTING.md

@@ -0,0 +1,10 @@
+# Contributing to D-Net Hadoop
+
+:+1::tada: First off, thanks for taking the time to contribute! :tada::+1:
+
+This project and everyone participating in it is governed by our [Code of Conduct](CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code. Please report unacceptable behavior to [dnet-team@isti.cnr.it](mailto:dnet-team@isti.cnr.it).
+
+The following is a set of guidelines for contributing to this project and its packages. These are mostly guidelines, not rules, which applies to this project as a while, including all its sub-modules. 
+Use your best judgment, and feel free to propose changes to this document in a pull request.
+
+All contributions are welcome, all contributions will be considered to be contributed under the [project license](LICENSE.md).

README.md

@@ -1,2 +1,133 @@
 # dnet-hadoop
-Dnet-hadoop is a tool for
+
+Dnet-hadoop is the project that defined all the [OOZIE workflows](https://oozie.apache.org/) for the OpenAIRE Graph construction, processing, provisioning.
+
+This project adheres to the Contributor Covenant [code of conduct](CODE_OF_CONDUCT.md).
+By participating, you are expected to uphold this code. Please report unacceptable behavior to [dnet-team@isti.cnr.it](mailto:dnet-team@isti.cnr.it).
+
+This project is licensed under the [AGPL v3 or later version](#LICENSE.md).
+
+How to build, package and run oozie workflows
+====================
+
+Oozie-installer is a utility allowing building, uploading and running oozie workflows. In practice, it creates a `*.tar.gz` 
+package that contains resources that define a workflow and some helper scripts.
+
+This module is automatically executed when running:
+
+`mvn package -Poozie-package -Dworkflow.source.dir=classpath/to/parent/directory/of/oozie_app`
+
+on module having set:
+
+```
+<parent>
+    <groupId>eu.dnetlib.dhp</groupId>
+    <artifactId>dhp-workflows</artifactId>
+</parent>
+```
+
+in `pom.xml` file. `oozie-package` profile initializes oozie workflow packaging, `workflow.source.dir` property points to 
+a workflow (notice: this is not a relative path but a classpath to directory usually holding `oozie_app` subdirectory).
+
+The outcome of this packaging is `oozie-package.tar.gz` file containing inside all the resources required to run Oozie workflow:
+
+- jar packages
+- workflow definitions
+- job properties
+- maintenance scripts
+
+Required properties
+====================
+
+In order to include proper workflow within package, `workflow.source.dir` property has to be set. It could be provided 
+by setting `-Dworkflow.source.dir=some/job/dir` maven parameter.
+
+In oder to define full set of cluster environment properties one should create `~/.dhp/application.properties` file with 
+the following properties:
+
+- `dhp.hadoop.frontend.user.name` - your user name on hadoop cluster and frontend machine
+- `dhp.hadoop.frontend.host.name` - frontend host name
+- `dhp.hadoop.frontend.temp.dir` - frontend directory for temporary files
+- `dhp.hadoop.frontend.port.ssh` - frontend machine ssh port
+- `oozieServiceLoc` - oozie service location required by run_workflow.sh script executing oozie job
+- `nameNode` - name node address
+- `jobTracker` - job tracker address
+- `oozie.execution.log.file.location` - location of file that will be created when executing oozie job, it contains output 
+produced by `run_workflow.sh` script (needed to obtain oozie job id)
+- `maven.executable` - mvn command location, requires parameterization due to a different setup of CI cluster
+- `sparkDriverMemory` - amount of memory assigned to spark jobs driver
+- `sparkExecutorMemory` - amount of memory assigned to spark jobs executors
+- `sparkExecutorCores` - number of cores assigned to spark jobs executors
+
+All values will be overriden with the ones from `job.properties` and eventually `job-override.properties` stored in module's 
+main folder.
+
+When overriding properties from `job.properties`, `job-override.properties` file can be created in main module directory 
+(the one containing `pom.xml` file) and define all new properties which will override existing properties. 
+One can provide those properties one by one as command line `-D` arguments.
+
+Properties overriding order is the following:
+
+1. `pom.xml` defined properties (located in the project root dir)
+2. `~/.dhp/application.properties` defined properties
+3. `${workflow.source.dir}/job.properties`
+4. `job-override.properties` (located in the project root dir)
+5. `maven -Dparam=value`
+
+where the maven `-Dparam` property is overriding all the other ones.
+
+Workflow definition requirements
+====================
+
+`workflow.source.dir` property should point to the following directory structure:
+
+	[${workflow.source.dir}]
+		|
+		|-job.properties (optional)
+		|
+		\-[oozie_app]
+			|
+			\-workflow.xml
+
+This property can be set using maven `-D` switch.
+
+`[oozie_app]` is the default directory name however it can be set to any value as soon as `oozieAppDir` property is 
+provided with directory name as value.
+
+Sub-workflows are supported as well and sub-workflow directories should be nested within `[oozie_app]` directory.
+
+Creating oozie installer step-by-step
+=====================================
+
+Automated oozie-installer steps are the following:
+
+1. creating jar packages:  `*.jar` and `*tests.jar` along with copying all dependencies in `target/dependencies`
+2. reading properties from maven, `~/.dhp/application.properties`, `job.properties`, `job-override.properties`
+3. invoking priming mechanism linking resources from import.txt file (currently resolving subworkflow resources)
+4. assembling shell scripts for preparing Hadoop filesystem, uploading Oozie application and starting workflow
+5. copying whole `${workflow.source.dir}` content to `target/${oozie.package.file.name}`
+6. generating updated `job.properties` file in `target/${oozie.package.file.name}` based on maven, 
+`~/.dhp/application.properties`, `job.properties` and `job-override.properties`
+7. creating `lib` directory (or multiple directories for sub-workflows for each nested directory) and copying jar packages 
+created at step (1) to each one of them
+8. bundling whole `${oozie.package.file.name}` directory into single tar.gz package
+
+Uploading oozie package and running workflow on cluster
+=======================================================
+
+In order to simplify deployment and execution process two dedicated profiles were introduced:
+
+- `deploy`
+- `run`
+
+to be used along with `oozie-package` profile e.g. by providing `-Poozie-package,deploy,run` maven parameters.
+
+The `deploy` profile supplements packaging process with:
+1) uploading oozie-package via scp to `/home/${user.name}/oozie-packages` directory on `${dhp.hadoop.frontend.host.name}` machine
+2) extracting uploaded package
+3) uploading oozie content to hadoop cluster HDFS location defined in `oozie.wf.application.path` property (generated dynamically by maven build process, based on `${dhp.hadoop.frontend.user.name}` and `workflow.source.dir` properties)
+
+The `run` profile introduces:
+1) executing oozie application uploaded to HDFS cluster using `deploy` command. Triggers `run_workflow.sh` script providing runtime properties defined in `job.properties` file.
+
+Notice: ssh access to frontend machine has to be configured on system level and it is preferable to set key-based authentication in order to simplify remote operations.

dhp-build/dhp-build-assembly-resources/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp-build</artifactId>
-        <version>1.2.4-SNAPSHOT</version>
+        <version>1.2.5-SNAPSHOT</version>
     </parent>
 
     <artifactId>dhp-build-assembly-resources</artifactId>

dhp-build/dhp-build-properties-maven-plugin/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp-build</artifactId>
-        <version>1.2.4-SNAPSHOT</version>
+        <version>1.2.5-SNAPSHOT</version>
     </parent>
 
     <artifactId>dhp-build-properties-maven-plugin</artifactId>

dhp-build/dhp-build-properties-maven-plugin/src/main/java/eu/dnetlib/maven/plugin/properties/GenerateOoziePropertiesMojo.java

@@ -8,8 +8,6 @@ import java.util.List;
 import org.apache.commons.lang.ArrayUtils;
 import org.apache.commons.lang.StringUtils;
 import org.apache.maven.plugin.AbstractMojo;
-import org.apache.maven.plugin.MojoExecutionException;
-import org.apache.maven.plugin.MojoFailureException;
 
 /**
  * Generates oozie properties which were not provided from commandline.
@@ -27,7 +25,7 @@ public class GenerateOoziePropertiesMojo extends AbstractMojo {
 	};
 
 	@Override
-	public void execute() throws MojoExecutionException, MojoFailureException {
+	public void execute() {
 		if (System.getProperties().containsKey(PROPERTY_NAME_WF_SOURCE_DIR)
 			&& !System.getProperties().containsKey(PROPERTY_NAME_SANDBOX_NAME)) {
 			String generatedSandboxName = generateSandboxName(
@@ -46,24 +44,24 @@ public class GenerateOoziePropertiesMojo extends AbstractMojo {
 	/**
 	 * Generates sandbox name from workflow source directory.
 	 *
-	 * @param wfSourceDir
+	 * @param wfSourceDir workflow source directory
 	 * @return generated sandbox name
 	 */
 	private String generateSandboxName(String wfSourceDir) {
 		// utilize all dir names until finding one of the limiters
-		List<String> sandboxNameParts = new ArrayList<String>();
+		List<String> sandboxNameParts = new ArrayList<>();
 		String[] tokens = StringUtils.split(wfSourceDir, File.separatorChar);
 		ArrayUtils.reverse(tokens);
 		if (tokens.length > 0) {
 			for (String token : tokens) {
 				for (String limiter : limiters) {
 					if (limiter.equals(token)) {
-						return sandboxNameParts.size() > 0
+						return !sandboxNameParts.isEmpty()
 							? StringUtils.join(sandboxNameParts.toArray())
 							: null;
 					}
 				}
-				if (sandboxNameParts.size() > 0) {
+				if (!sandboxNameParts.isEmpty()) {
 					sandboxNameParts.add(0, File.separator);
 				}
 				sandboxNameParts.add(0, token);

dhp-build/dhp-build-properties-maven-plugin/src/main/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectProperties.java

@@ -16,6 +16,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -289,7 +290,7 @@ public class WritePredefinedProjectProperties extends AbstractMojo {
 	 */
 	protected List<String> getEscapeChars(String escapeChars) {
 		List<String> tokens = getListFromCSV(escapeChars);
-		List<String> realTokens = new ArrayList<String>();
+		List<String> realTokens = new ArrayList<>();
 		for (String token : tokens) {
 			String realToken = getRealToken(token);
 			realTokens.add(realToken);
@@ -324,7 +325,7 @@ public class WritePredefinedProjectProperties extends AbstractMojo {
 	 * @return content
 	 */
 	protected String getContent(String comment, Properties properties, List<String> escapeTokens) {
-		List<String> names = new ArrayList<String>(properties.stringPropertyNames());
+		List<String> names = new ArrayList<>(properties.stringPropertyNames());
 		Collections.sort(names);
 		StringBuilder sb = new StringBuilder();
 		if (!StringUtils.isBlank(comment)) {
@@ -352,7 +353,7 @@ public class WritePredefinedProjectProperties extends AbstractMojo {
 		throws MojoExecutionException {
 		try {
 			String content = getContent(comment, properties, escapeTokens);
-			FileUtils.writeStringToFile(file, content, ENCODING_UTF8);
+			FileUtils.writeStringToFile(file, content, StandardCharsets.UTF_8);
 		} catch (IOException e) {
 			throw new MojoExecutionException("Error creating properties file", e);
 		}
@@ -399,9 +400,9 @@ public class WritePredefinedProjectProperties extends AbstractMojo {
 	 */
 	protected static final List<String> getListFromCSV(String csv) {
 		if (StringUtils.isBlank(csv)) {
-			return new ArrayList<String>();
+			return new ArrayList<>();
 		}
-		List<String> list = new ArrayList<String>();
+		List<String> list = new ArrayList<>();
 		String[] tokens = StringUtils.split(csv, ",");
 		for (String token : tokens) {
 			list.add(token.trim());

dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/GenerateOoziePropertiesMojoTest.java

@@ -9,18 +9,18 @@ import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 /** @author mhorst, claudio.atzori */
-public class GenerateOoziePropertiesMojoTest {
+class GenerateOoziePropertiesMojoTest {
 
 	private final GenerateOoziePropertiesMojo mojo = new GenerateOoziePropertiesMojo();
 
 	@BeforeEach
-	public void clearSystemProperties() {
+	void clearSystemProperties() {
 		System.clearProperty(PROPERTY_NAME_SANDBOX_NAME);
 		System.clearProperty(PROPERTY_NAME_WF_SOURCE_DIR);
 	}
 
 	@Test
-	public void testExecuteEmpty() throws Exception {
+	void testExecuteEmpty() throws Exception {
 		// execute
 		mojo.execute();
 
@@ -29,7 +29,7 @@ public class GenerateOoziePropertiesMojoTest {
 	}
 
 	@Test
-	public void testExecuteSandboxNameAlreadySet() throws Exception {
+	void testExecuteSandboxNameAlreadySet() throws Exception {
 		// given
 		String workflowSourceDir = "eu/dnetlib/dhp/wf/transformers";
 		String sandboxName = "originalSandboxName";
@@ -44,7 +44,7 @@ public class GenerateOoziePropertiesMojoTest {
 	}
 
 	@Test
-	public void testExecuteEmptyWorkflowSourceDir() throws Exception {
+	void testExecuteEmptyWorkflowSourceDir() throws Exception {
 		// given
 		String workflowSourceDir = "";
 		System.setProperty(PROPERTY_NAME_WF_SOURCE_DIR, workflowSourceDir);
@@ -57,7 +57,7 @@ public class GenerateOoziePropertiesMojoTest {
 	}
 
 	@Test
-	public void testExecuteNullSandboxNameGenerated() throws Exception {
+	void testExecuteNullSandboxNameGenerated() throws Exception {
 		// given
 		String workflowSourceDir = "eu/dnetlib/dhp/";
 		System.setProperty(PROPERTY_NAME_WF_SOURCE_DIR, workflowSourceDir);
@@ -70,7 +70,7 @@ public class GenerateOoziePropertiesMojoTest {
 	}
 
 	@Test
-	public void testExecute() throws Exception {
+	void testExecute() throws Exception {
 		// given
 		String workflowSourceDir = "eu/dnetlib/dhp/wf/transformers";
 		System.setProperty(PROPERTY_NAME_WF_SOURCE_DIR, workflowSourceDir);
@@ -83,7 +83,7 @@ public class GenerateOoziePropertiesMojoTest {
 	}
 
 	@Test
-	public void testExecuteWithoutRoot() throws Exception {
+	void testExecuteWithoutRoot() throws Exception {
 		// given
 		String workflowSourceDir = "wf/transformers";
 		System.setProperty(PROPERTY_NAME_WF_SOURCE_DIR, workflowSourceDir);

dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectPropertiesTest.java

@@ -20,7 +20,7 @@ import org.mockito.junit.jupiter.MockitoExtension;
 
 /** @author mhorst, claudio.atzori */
 @ExtendWith(MockitoExtension.class)
-public class WritePredefinedProjectPropertiesTest {
+class WritePredefinedProjectPropertiesTest {
 
 	@Mock
 	private MavenProject mavenProject;
@@ -39,7 +39,7 @@ public class WritePredefinedProjectPropertiesTest {
 	// ----------------------------------- TESTS ---------------------------------------------
 
 	@Test
-	public void testExecuteEmpty() throws Exception {
+	void testExecuteEmpty() throws Exception {
 		// execute
 		mojo.execute();
 
@@ -50,7 +50,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteWithProjectProperties() throws Exception {
+	void testExecuteWithProjectProperties() throws Exception {
 		// given
 		String key = "projectPropertyKey";
 		String value = "projectPropertyValue";
@@ -70,7 +70,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test()
-	public void testExecuteWithProjectPropertiesAndInvalidOutputFile(@TempDir File testFolder) {
+	void testExecuteWithProjectPropertiesAndInvalidOutputFile(@TempDir File testFolder) {
 		// given
 		String key = "projectPropertyKey";
 		String value = "projectPropertyValue";
@@ -80,11 +80,19 @@ public class WritePredefinedProjectPropertiesTest {
 		mojo.outputFile = testFolder;
 
 		// execute
-		Assertions.assertThrows(MojoExecutionException.class, () -> mojo.execute());
+		try {
+			mojo.execute();
+			Assertions.assertTrue(false); // not reached
+		} catch (Exception e) {
+			Assertions
+				.assertTrue(
+					MojoExecutionException.class.isAssignableFrom(e.getClass()) ||
+						IllegalArgumentException.class.isAssignableFrom(e.getClass()));
+		}
 	}
 
 	@Test
-	public void testExecuteWithProjectPropertiesExclusion(@TempDir File testFolder) throws Exception {
+	void testExecuteWithProjectPropertiesExclusion(@TempDir File testFolder) throws Exception {
 		// given
 		String key = "projectPropertyKey";
 		String value = "projectPropertyValue";
@@ -108,7 +116,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteWithProjectPropertiesInclusion(@TempDir File testFolder) throws Exception {
+	void testExecuteWithProjectPropertiesInclusion(@TempDir File testFolder) throws Exception {
 		// given
 		String key = "projectPropertyKey";
 		String value = "projectPropertyValue";
@@ -132,7 +140,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteIncludingPropertyKeysFromFile(@TempDir File testFolder) throws Exception {
+	void testExecuteIncludingPropertyKeysFromFile(@TempDir File testFolder) throws Exception {
 		// given
 		String key = "projectPropertyKey";
 		String value = "projectPropertyValue";
@@ -164,7 +172,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteIncludingPropertyKeysFromClasspathResource(@TempDir File testFolder)
+	void testExecuteIncludingPropertyKeysFromClasspathResource(@TempDir File testFolder)
 		throws Exception {
 		// given
 		String key = "projectPropertyKey";
@@ -194,7 +202,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteIncludingPropertyKeysFromBlankLocation() {
+	void testExecuteIncludingPropertyKeysFromBlankLocation() {
 		// given
 		String key = "projectPropertyKey";
 		String value = "projectPropertyValue";
@@ -214,7 +222,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteIncludingPropertyKeysFromXmlFile(@TempDir File testFolder)
+	void testExecuteIncludingPropertyKeysFromXmlFile(@TempDir File testFolder)
 		throws Exception {
 		// given
 		String key = "projectPropertyKey";
@@ -247,7 +255,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteIncludingPropertyKeysFromInvalidXmlFile(@TempDir File testFolder)
+	void testExecuteIncludingPropertyKeysFromInvalidXmlFile(@TempDir File testFolder)
 		throws Exception {
 		// given
 		String key = "projectPropertyKey";
@@ -273,7 +281,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteWithQuietModeOn(@TempDir File testFolder) throws Exception {
+	void testExecuteWithQuietModeOn(@TempDir File testFolder) throws Exception {
 		// given
 		mojo.setQuiet(true);
 		mojo.setIncludePropertyKeysFromFiles(new String[] {
@@ -290,7 +298,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteIncludingPropertyKeysFromInvalidFile() {
+	void testExecuteIncludingPropertyKeysFromInvalidFile() {
 		// given
 		mojo.setIncludePropertyKeysFromFiles(new String[] {
 			"invalid location"
@@ -301,7 +309,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteWithEnvironmentProperties(@TempDir File testFolder) throws Exception {
+	void testExecuteWithEnvironmentProperties(@TempDir File testFolder) throws Exception {
 		// given
 		mojo.setIncludeEnvironmentVariables(true);
 
@@ -318,7 +326,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteWithSystemProperties(@TempDir File testFolder) throws Exception {
+	void testExecuteWithSystemProperties(@TempDir File testFolder) throws Exception {
 		// given
 		String key = "systemPropertyKey";
 		String value = "systemPropertyValue";
@@ -337,7 +345,7 @@ public class WritePredefinedProjectPropertiesTest {
 	}
 
 	@Test
-	public void testExecuteWithSystemPropertiesAndEscapeChars(@TempDir File testFolder)
+	void testExecuteWithSystemPropertiesAndEscapeChars(@TempDir File testFolder)
 		throws Exception {
 		// given
 		String key = "systemPropertyKey ";

dhp-build/dhp-code-style/pom.xml

@@ -5,7 +5,7 @@
 
     <groupId>eu.dnetlib.dhp</groupId>
     <artifactId>dhp-code-style</artifactId>
-    <version>1.2.4-SNAPSHOT</version>
+    <version>1.2.5-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
@@ -22,9 +22,20 @@
             <id>dnet45-releases</id>
             <url>https://maven.d4science.org/nexus/content/repositories/dnet45-releases</url>
         </repository>
+        <site>
+            <id>DHPSite</id>
+            <url>${dhp.site.stage.path}/dhp-build/dhp-code-style</url>
+        </site>
     </distributionManagement>
 
     <build>
+        <extensions>
+            <extension>
+                <groupId>org.apache.maven.wagon</groupId>
+                <artifactId>wagon-ssh</artifactId>
+                <version>2.10</version>
+            </extension>
+        </extensions>
         <pluginManagement>
             <plugins>
                 <plugin>
@@ -35,14 +46,19 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-site-plugin</artifactId>
-                    <version>3.7.1</version>
+                    <version>3.9.1</version>
+                    <configuration>
+                        <skip>true</skip>
+                    </configuration>
                 </plugin>
             </plugins>
         </pluginManagement>
     </build>
 
     <properties>
+
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <dhp.site.stage.path>sftp://dnet-hadoop@static-web.d4science.org/dnet-hadoop</dhp.site.stage.path>
     </properties>
 
 </project>

dhp-build/dhp-code-style/src/main/resources/scalafmt/scalafmt.conf

@@ -0,0 +1,21 @@
+style = defaultWithAlign
+
+align.openParenCallSite = false
+align.openParenDefnSite = false
+align.tokens = [{code = "->"}, {code = "<-"}, {code = "=>", owner = "Case"}]
+continuationIndent.callSite = 2
+continuationIndent.defnSite = 2
+danglingParentheses = true
+indentOperator = spray
+maxColumn = 120
+newlines.alwaysBeforeTopLevelStatements = true
+project.excludeFilters = [".*\\.sbt"]
+rewrite.rules = [AvoidInfix]
+rewrite.rules = [ExpandImportSelectors]
+rewrite.rules = [RedundantBraces]
+rewrite.rules = [RedundantParens]
+rewrite.rules = [SortImports]
+rewrite.rules = [SortModifiers]
+rewrite.rules = [PreferCurlyFors]
+spaces.inImportCurlyBraces = false
+unindentTopLevelOperators = true

dhp-build/dhp-code-style/src/site/site.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<project xmlns="http://maven.apache.org/DECORATION/1.8.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/DECORATION/1.8.0 https://maven.apache.org/xsd/decoration-1.8.0.xsd"
+         name="DHP-Aggregation">
+    <skin>
+        <groupId>org.apache.maven.skins</groupId>
+        <artifactId>maven-fluido-skin</artifactId>
+        <version>1.8</version>
+    </skin>
+    <poweredBy>
+        <logo name="OpenAIRE Research Graph" href="https://graph.openaire.eu/"
+              img="https://graph.openaire.eu/assets/common-assets/logo-large-graph.png"/>
+    </poweredBy>
+    <body>
+        <links>
+            <item name="Code" href="https://code-repo.d4science.org/" />
+        </links>
+        <menu ref="modules" />
+        <menu ref="reports"/>
+    </body>
+</project>

dhp-build/pom.xml

@@ -4,12 +4,15 @@
 	<parent>
 		<groupId>eu.dnetlib.dhp</groupId>
 		<artifactId>dhp</artifactId>
-		<version>1.2.4-SNAPSHOT</version>
+		<version>1.2.5-SNAPSHOT</version>
 	</parent>
 	<artifactId>dhp-build</artifactId>
 	<packaging>pom</packaging>
 
 	<description>This module is a container for the build tools used in dnet-hadoop</description>
+	<properties>
+		<maven.javadoc.skip>true</maven.javadoc.skip>
+	</properties>
 
 	<modules>
 		<module>dhp-code-style</module>
@@ -17,4 +20,12 @@
 		<module>dhp-build-properties-maven-plugin</module>
 	</modules>
 
+
+ <distributionManagement>
+	 <site>
+		 <id>DHPSite</id>
+		 <url>${dhp.site.stage.path}/dhp-build/</url>
+	 </site>
+ </distributionManagement>
+
 </project>

dhp-build/src/site/site.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<project xmlns="http://maven.apache.org/DECORATION/1.8.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/DECORATION/1.8.0 https://maven.apache.org/xsd/decoration-1.8.0.xsd"
+         name="DHP-Aggregation">
+    <skin>
+        <groupId>org.apache.maven.skins</groupId>
+        <artifactId>maven-fluido-skin</artifactId>
+        <version>1.8</version>
+    </skin>
+    <poweredBy>
+        <logo name="OpenAIRE Research Graph" href="https://graph.openaire.eu/"
+              img="https://graph.openaire.eu/assets/common-assets/logo-large-graph.png"/>
+    </poweredBy>
+    <body>
+        <links>
+            <item name="Code" href="https://code-repo.d4science.org/" />
+        </links>
+
+        <menu ref="modules" />
+        <menu ref="reports"/>
+    </body>
+</project>

dhp-common/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>eu.dnetlib.dhp</groupId>
 		<artifactId>dhp</artifactId>
-		<version>1.2.4-SNAPSHOT</version>
+		<version>1.2.5-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 
 	</parent>
@@ -13,25 +13,80 @@
 	<artifactId>dhp-common</artifactId>
 	<packaging>jar</packaging>
 
+	<distributionManagement>
+		<site>
+			<id>DHPSite</id>
+			<url>${dhp.site.stage.path}/dhp-common</url>
+		</site>
+	</distributionManagement>
+
 	<description>This module contains common utilities meant to be used across the dnet-hadoop submodules</description>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>net.alchim31.maven</groupId>
+				<artifactId>scala-maven-plugin</artifactId>
+				<version>${net.alchim31.maven.version}</version>
+				<executions>
+					<execution>
+						<id>scala-compile-first</id>
+						<phase>initialize</phase>
+						<goals>
+							<goal>add-source</goal>
+							<goal>compile</goal>
+						</goals>
+					</execution>
+					<execution>
+						<id>scala-test-compile</id>
+						<phase>process-test-resources</phase>
+						<goals>
+							<goal>testCompile</goal>
+						</goals>
+					</execution>
+					<execution>
+						<id>scala-doc</id>
+						<phase>process-resources</phase> <!-- or wherever -->
+						<goals>
+							<goal>doc</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+					<scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
+					<scalaVersion>${scala.version}</scalaVersion>
+				</configuration>
+			</plugin>
+		</plugins>
+
+	</build>
 
 	<dependencies>
-
 		<dependency>
-			<groupId>org.apache.hadoop</groupId>
-			<artifactId>hadoop-common</artifactId>
+			<groupId>edu.cmu</groupId>
+			<artifactId>secondstring</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>com.ibm.icu</groupId>
+			<artifactId>icu4j</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>com.github.sisyphsu</groupId>
 			<artifactId>dateparser</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>me.xuender</groupId>
+			<artifactId>unidecode</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-core_2.11</artifactId>
+			<artifactId>spark-core_${scala.binary.version}</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-sql_2.11</artifactId>
+			<artifactId>spark-sql_${scala.binary.version}</artifactId>
 		</dependency>
 
 		<dependency>
@@ -93,11 +148,6 @@
 			<artifactId>okhttp</artifactId>
 		</dependency>
 
-		<dependency>
-			<groupId>eu.dnetlib</groupId>
-			<artifactId>dnet-pace-core</artifactId>
-		</dependency>
-
 		<dependency>
 			<groupId>org.apache.httpcomponents</groupId>
 			<artifactId>httpclient</artifactId>
@@ -112,6 +162,30 @@
 			<groupId>eu.dnetlib.dhp</groupId>
 			<artifactId>dhp-schemas</artifactId>
 		</dependency>
+
+		<dependency>
+			<groupId>com.opencsv</groupId>
+			<artifactId>opencsv</artifactId>
+		</dependency>
 	</dependencies>
 
+	<!-- dependencies required on JDK9+ because J2EE has been removed -->
+	<profiles>
+		<profile>
+			<id>spark-34</id>
+			<dependencies>
+				<dependency>
+					<groupId>javax.xml.bind</groupId>
+					<artifactId>jaxb-api</artifactId>
+					<version>2.2.11</version>
+				</dependency>
+				<dependency>
+					<groupId>com.sun.xml.ws</groupId>
+					<artifactId>jaxws-ri</artifactId>
+					<version>2.3.3</version>
+					<type>pom</type>
+				</dependency>
+			</dependencies>
+		</profile>
+	</profiles>
 </project>

dhp-common/src/main/java/eu/dnetlib/dhp/application/ApplicationUtils.java

@@ -1,14 +0,0 @@
-
-package eu.dnetlib.dhp.application;
-
-import java.io.*;
-import java.util.Map;
-import java.util.Properties;
-
-import org.apache.hadoop.conf.Configuration;
-
-import com.google.common.collect.Maps;
-
-public class ApplicationUtils {
-
-}

dhp-common/src/main/java/eu/dnetlib/dhp/application/ArgumentApplicationParser.java

@@ -56,13 +56,13 @@ public class ArgumentApplicationParser implements Serializable {
 			final StringWriter stringWriter = new StringWriter();
 			IOUtils.copy(gis, stringWriter);
 			return stringWriter.toString();
-		} catch (Throwable e) {
-			log.error("Wrong value to decompress:" + abstractCompressed);
-			throw new RuntimeException(e);
+		} catch (IOException e) {
+			log.error("Wrong value to decompress: {}", abstractCompressed);
+			throw new IllegalArgumentException(e);
 		}
 	}
 
-	public static String compressArgument(final String value) throws Exception {
+	public static String compressArgument(final String value) throws IOException {
 		ByteArrayOutputStream out = new ByteArrayOutputStream();
 		GZIPOutputStream gzip = new GZIPOutputStream(out);
 		gzip.write(value.getBytes());

dhp-common/src/main/java/eu/dnetlib/dhp/application/OptionsParameter.java

@@ -9,9 +9,6 @@ public class OptionsParameter {
 	private boolean paramRequired;
 	private boolean compressed;
 
-	public OptionsParameter() {
-	}
-
 	public String getParamName() {
 		return paramName;
 	}

dhp-common/src/main/java/eu/dnetlib/dhp/collection/ApiDescriptor.java

@@ -34,7 +34,7 @@ public class ApiDescriptor {
 		return params;
 	}
 
-	public void setParams(final HashMap<String, String> params) {
+	public void setParams(final Map<String, String> params) {
 		this.params = params;
 	}
 

dhp-common/src/main/java/eu/dnetlib/dhp/common/Constants.java

@@ -10,8 +10,17 @@ public class Constants {
 	public static final Map<String, String> accessRightsCoarMap = Maps.newHashMap();
 	public static final Map<String, String> coarCodeLabelMap = Maps.newHashMap();
 
+	public static final String ROR_NS_PREFIX = "ror_________";
+
+	public static final String ROR_OPENAIRE_ID = "10|openaire____::993a7ae7a863813cf95028b50708e222";
+
+	public static final String ROR_DATASOURCE_NAME = "Research Organization Registry (ROR)";
+
 	public static String COAR_ACCESS_RIGHT_SCHEMA = "http://vocabularies.coar-repositories.org/documentation/access_rights/";
 
+	private Constants() {
+	}
+
 	static {
 		accessRightsCoarMap.put("OPEN", "c_abf2");
 		accessRightsCoarMap.put("RESTRICTED", "c_16ec");
@@ -42,6 +51,7 @@ public class Constants {
 	public static final String RETRY_DELAY = "retryDelay";
 	public static final String CONNECT_TIMEOUT = "connectTimeOut";
 	public static final String READ_TIMEOUT = "readTimeOut";
+	public static final String REQUEST_METHOD = "requestMethod";
 	public static final String FROM_DATE_OVERRIDE = "fromDateOverride";
 	public static final String UNTIL_DATE_OVERRIDE = "untilDateOverride";
 
@@ -49,4 +59,10 @@ public class Constants {
 	public static final String CONTENT_INVALIDRECORDS = "InvalidRecords";
 	public static final String CONTENT_TRANSFORMEDRECORDS = "transformedItems";
 
+	// IETF Draft and used by Repositories like ZENODO , not included in APACHE HTTP java packages
+	// see https://ietf-wg-httpapi.github.io/ratelimit-headers/draft-ietf-httpapi-ratelimit-headers.html
+	public static final String HTTPHEADER_IETF_DRAFT_RATELIMIT_LIMIT = "X-RateLimit-Limit";
+	public static final String HTTPHEADER_IETF_DRAFT_RATELIMIT_REMAINING = "X-RateLimit-Remaining";
+	public static final String HTTPHEADER_IETF_DRAFT_RATELIMIT_RESET = "X-RateLimit-Reset";
+
 }

dhp-common/src/main/java/eu/dnetlib/dhp/common/GraphResultMapper.java

@@ -1,412 +0,0 @@
-
-package eu.dnetlib.dhp.common;
-
-import java.io.Serializable;
-import java.util.*;
-import java.util.stream.Collectors;
-
-import eu.dnetlib.dhp.schema.common.ModelConstants;
-import eu.dnetlib.dhp.schema.dump.oaf.*;
-import eu.dnetlib.dhp.schema.dump.oaf.community.CommunityInstance;
-import eu.dnetlib.dhp.schema.dump.oaf.community.CommunityResult;
-import eu.dnetlib.dhp.schema.oaf.DataInfo;
-import eu.dnetlib.dhp.schema.oaf.Field;
-import eu.dnetlib.dhp.schema.oaf.Journal;
-import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
-
-public class GraphResultMapper implements Serializable {
-
-	public static <E extends eu.dnetlib.dhp.schema.oaf.OafEntity> Result map(
-		E in) {
-
-		CommunityResult out = new CommunityResult();
-
-		eu.dnetlib.dhp.schema.oaf.Result input = (eu.dnetlib.dhp.schema.oaf.Result) in;
-		Optional<eu.dnetlib.dhp.schema.oaf.Qualifier> ort = Optional.ofNullable(input.getResulttype());
-		if (ort.isPresent()) {
-			switch (ort.get().getClassid()) {
-				case "publication":
-					Optional<Journal> journal = Optional
-						.ofNullable(((eu.dnetlib.dhp.schema.oaf.Publication) input).getJournal());
-					if (journal.isPresent()) {
-						Journal j = journal.get();
-						Container c = new Container();
-						c.setConferencedate(j.getConferencedate());
-						c.setConferenceplace(j.getConferenceplace());
-						c.setEdition(j.getEdition());
-						c.setEp(j.getEp());
-						c.setIss(j.getIss());
-						c.setIssnLinking(j.getIssnLinking());
-						c.setIssnOnline(j.getIssnOnline());
-						c.setIssnPrinted(j.getIssnPrinted());
-						c.setName(j.getName());
-						c.setSp(j.getSp());
-						c.setVol(j.getVol());
-						out.setContainer(c);
-						out.setType(ModelConstants.PUBLICATION_DEFAULT_RESULTTYPE.getClassname());
-					}
-					break;
-				case "dataset":
-					eu.dnetlib.dhp.schema.oaf.Dataset id = (eu.dnetlib.dhp.schema.oaf.Dataset) input;
-					Optional.ofNullable(id.getSize()).ifPresent(v -> out.setSize(v.getValue()));
-					Optional.ofNullable(id.getVersion()).ifPresent(v -> out.setVersion(v.getValue()));
-
-					out
-						.setGeolocation(
-							Optional
-								.ofNullable(id.getGeolocation())
-								.map(
-									igl -> igl
-										.stream()
-										.filter(Objects::nonNull)
-										.map(gli -> {
-											GeoLocation gl = new GeoLocation();
-											gl.setBox(gli.getBox());
-											gl.setPlace(gli.getPlace());
-											gl.setPoint(gli.getPoint());
-											return gl;
-										})
-										.collect(Collectors.toList()))
-								.orElse(null));
-
-					out.setType(ModelConstants.DATASET_DEFAULT_RESULTTYPE.getClassname());
-					break;
-				case "software":
-
-					eu.dnetlib.dhp.schema.oaf.Software is = (eu.dnetlib.dhp.schema.oaf.Software) input;
-					Optional
-						.ofNullable(is.getCodeRepositoryUrl())
-						.ifPresent(value -> out.setCodeRepositoryUrl(value.getValue()));
-					Optional
-						.ofNullable(is.getDocumentationUrl())
-						.ifPresent(
-							value -> out
-								.setDocumentationUrl(
-									value
-										.stream()
-										.map(v -> v.getValue())
-										.collect(Collectors.toList())));
-
-					Optional
-						.ofNullable(is.getProgrammingLanguage())
-						.ifPresent(value -> out.setProgrammingLanguage(value.getClassid()));
-
-					out.setType(ModelConstants.SOFTWARE_DEFAULT_RESULTTYPE.getClassname());
-					break;
-				case "other":
-
-					eu.dnetlib.dhp.schema.oaf.OtherResearchProduct ir = (eu.dnetlib.dhp.schema.oaf.OtherResearchProduct) input;
-					out
-						.setContactgroup(
-							Optional
-								.ofNullable(ir.getContactgroup())
-								.map(value -> value.stream().map(cg -> cg.getValue()).collect(Collectors.toList()))
-								.orElse(null));
-
-					out
-						.setContactperson(
-							Optional
-								.ofNullable(ir.getContactperson())
-								.map(value -> value.stream().map(cp -> cp.getValue()).collect(Collectors.toList()))
-								.orElse(null));
-					out
-						.setTool(
-							Optional
-								.ofNullable(ir.getTool())
-								.map(value -> value.stream().map(t -> t.getValue()).collect(Collectors.toList()))
-								.orElse(null));
-
-					out.setType(ModelConstants.ORP_DEFAULT_RESULTTYPE.getClassname());
-
-					break;
-			}
-
-			Optional
-				.ofNullable(input.getAuthor())
-				.ifPresent(ats -> out.setAuthor(ats.stream().map(at -> getAuthor(at)).collect(Collectors.toList())));
-
-			// I do not map Access Right UNKNOWN or OTHER
-
-			Optional<eu.dnetlib.dhp.schema.oaf.Qualifier> oar = Optional.ofNullable(input.getBestaccessright());
-			if (oar.isPresent()) {
-				if (Constants.accessRightsCoarMap.containsKey(oar.get().getClassid())) {
-					String code = Constants.accessRightsCoarMap.get(oar.get().getClassid());
-					out
-						.setBestaccessright(
-							AccessRight
-								.newInstance(
-									code,
-									Constants.coarCodeLabelMap.get(code),
-									Constants.COAR_ACCESS_RIGHT_SCHEMA));
-				}
-			}
-
-			final List<String> contributorList = new ArrayList<>();
-			Optional
-				.ofNullable(input.getContributor())
-				.ifPresent(value -> value.stream().forEach(c -> contributorList.add(c.getValue())));
-			out.setContributor(contributorList);
-
-			Optional
-				.ofNullable(input.getCountry())
-				.ifPresent(
-					value -> out
-						.setCountry(
-							value
-								.stream()
-								.map(
-									c -> {
-										if (c.getClassid().equals((ModelConstants.UNKNOWN))) {
-											return null;
-										}
-										Country country = new Country();
-										country.setCode(c.getClassid());
-										country.setLabel(c.getClassname());
-										Optional
-											.ofNullable(c.getDataInfo())
-											.ifPresent(
-												provenance -> country
-													.setProvenance(
-														Provenance
-															.newInstance(
-																provenance
-																	.getProvenanceaction()
-																	.getClassname(),
-																c.getDataInfo().getTrust())));
-										return country;
-									})
-								.filter(Objects::nonNull)
-								.collect(Collectors.toList())));
-
-			final List<String> coverageList = new ArrayList<>();
-			Optional
-				.ofNullable(input.getCoverage())
-				.ifPresent(value -> value.stream().forEach(c -> coverageList.add(c.getValue())));
-			out.setCoverage(coverageList);
-
-			out.setDateofcollection(input.getDateofcollection());
-
-			final List<String> descriptionList = new ArrayList<>();
-			Optional
-				.ofNullable(input.getDescription())
-				.ifPresent(value -> value.forEach(d -> descriptionList.add(d.getValue())));
-			out.setDescription(descriptionList);
-			Optional<Field<String>> oStr = Optional.ofNullable(input.getEmbargoenddate());
-			if (oStr.isPresent()) {
-				out.setEmbargoenddate(oStr.get().getValue());
-			}
-
-			final List<String> formatList = new ArrayList<>();
-			Optional
-				.ofNullable(input.getFormat())
-				.ifPresent(value -> value.stream().forEach(f -> formatList.add(f.getValue())));
-			out.setFormat(formatList);
-			out.setId(input.getId());
-			out.setOriginalId(input.getOriginalId());
-
-			Optional<List<eu.dnetlib.dhp.schema.oaf.Instance>> oInst = Optional
-				.ofNullable(input.getInstance());
-
-			if (oInst.isPresent()) {
-				out
-					.setInstance(
-						oInst.get().stream().map(i -> getInstance(i)).collect(Collectors.toList()));
-
-			}
-
-			Optional<eu.dnetlib.dhp.schema.oaf.Qualifier> oL = Optional.ofNullable(input.getLanguage());
-			if (oL.isPresent()) {
-				eu.dnetlib.dhp.schema.oaf.Qualifier language = oL.get();
-				out.setLanguage(Qualifier.newInstance(language.getClassid(), language.getClassname()));
-			}
-			Optional<Long> oLong = Optional.ofNullable(input.getLastupdatetimestamp());
-			if (oLong.isPresent()) {
-				out.setLastupdatetimestamp(oLong.get());
-			}
-			Optional<List<StructuredProperty>> otitle = Optional.ofNullable(input.getTitle());
-			if (otitle.isPresent()) {
-				List<StructuredProperty> iTitle = otitle
-					.get()
-					.stream()
-					.filter(t -> t.getQualifier().getClassid().equalsIgnoreCase("main title"))
-					.collect(Collectors.toList());
-				if (iTitle.size() > 0) {
-					out.setMaintitle(iTitle.get(0).getValue());
-				}
-
-				iTitle = otitle
-					.get()
-					.stream()
-					.filter(t -> t.getQualifier().getClassid().equalsIgnoreCase("subtitle"))
-					.collect(Collectors.toList());
-				if (iTitle.size() > 0) {
-					out.setSubtitle(iTitle.get(0).getValue());
-				}
-
-			}
-
-			List<ControlledField> pids = new ArrayList<>();
-			Optional
-				.ofNullable(input.getPid())
-				.ifPresent(
-					value -> value
-						.stream()
-						.forEach(
-							p -> pids
-								.add(
-									ControlledField
-										.newInstance(p.getQualifier().getClassid(), p.getValue()))));
-			out.setPid(pids);
-			oStr = Optional.ofNullable(input.getDateofacceptance());
-			if (oStr.isPresent()) {
-				out.setPublicationdate(oStr.get().getValue());
-			}
-			oStr = Optional.ofNullable(input.getPublisher());
-			if (oStr.isPresent()) {
-				out.setPublisher(oStr.get().getValue());
-			}
-
-			List<String> sourceList = new ArrayList<>();
-			Optional
-				.ofNullable(input.getSource())
-				.ifPresent(value -> value.stream().forEach(s -> sourceList.add(s.getValue())));
-			// out.setSource(input.getSource().stream().map(s -> s.getValue()).collect(Collectors.toList()));
-			List<Subject> subjectList = new ArrayList<>();
-			Optional
-				.ofNullable(input.getSubject())
-				.ifPresent(
-					value -> value
-						.forEach(s -> subjectList.add(getSubject(s))));
-
-			out.setSubjects(subjectList);
-
-			out.setType(input.getResulttype().getClassid());
-		}
-
-		out
-			.setCollectedfrom(
-				input
-					.getCollectedfrom()
-					.stream()
-					.map(cf -> KeyValue.newInstance(cf.getKey(), cf.getValue()))
-					.collect(Collectors.toList()));
-
-		return out;
-
-	}
-
-	private static CommunityInstance getInstance(eu.dnetlib.dhp.schema.oaf.Instance i) {
-		CommunityInstance instance = new CommunityInstance();
-
-		setCommonValue(i, instance);
-
-		instance
-			.setCollectedfrom(
-				KeyValue
-					.newInstance(i.getCollectedfrom().getKey(), i.getCollectedfrom().getValue()));
-
-		instance
-			.setHostedby(
-				KeyValue.newInstance(i.getHostedby().getKey(), i.getHostedby().getValue()));
-
-		return instance;
-
-	}
-
-	private static <I extends Instance> void setCommonValue(eu.dnetlib.dhp.schema.oaf.Instance i, I instance) {
-		Optional<eu.dnetlib.dhp.schema.oaf.Qualifier> opAr = Optional
-			.ofNullable(i.getAccessright());
-		if (opAr.isPresent()) {
-			if (Constants.accessRightsCoarMap.containsKey(opAr.get().getClassid())) {
-				String code = Constants.accessRightsCoarMap.get(opAr.get().getClassid());
-				instance
-					.setAccessright(
-						AccessRight
-							.newInstance(
-								code,
-								Constants.coarCodeLabelMap.get(code),
-								Constants.COAR_ACCESS_RIGHT_SCHEMA));
-			}
-		}
-
-		Optional
-			.ofNullable(i.getLicense())
-			.ifPresent(value -> instance.setLicense(value.getValue()));
-		Optional
-			.ofNullable(i.getDateofacceptance())
-			.ifPresent(value -> instance.setPublicationdate(value.getValue()));
-		Optional
-			.ofNullable(i.getRefereed())
-			.ifPresent(value -> instance.setRefereed(value.getClassname()));
-		Optional
-			.ofNullable(i.getInstancetype())
-			.ifPresent(value -> instance.setType(value.getClassname()));
-		Optional.ofNullable(i.getUrl()).ifPresent(value -> instance.setUrl(value));
-
-	}
-
-	private static Subject getSubject(StructuredProperty s) {
-		Subject subject = new Subject();
-		subject.setSubject(ControlledField.newInstance(s.getQualifier().getClassid(), s.getValue()));
-		Optional<DataInfo> di = Optional.ofNullable(s.getDataInfo());
-		if (di.isPresent()) {
-			Provenance p = new Provenance();
-			p.setProvenance(di.get().getProvenanceaction().getClassname());
-			p.setTrust(di.get().getTrust());
-			subject.setProvenance(p);
-		}
-
-		return subject;
-	}
-
-	private static Author getAuthor(eu.dnetlib.dhp.schema.oaf.Author oa) {
-		Author a = new Author();
-		a.setFullname(oa.getFullname());
-		a.setName(oa.getName());
-		a.setSurname(oa.getSurname());
-		a.setRank(oa.getRank());
-
-		Optional<List<StructuredProperty>> oPids = Optional
-			.ofNullable(oa.getPid());
-		if (oPids.isPresent()) {
-			Pid pid = getOrcid(oPids.get());
-			if (pid != null) {
-				a.setPid(pid);
-			}
-		}
-
-		return a;
-	}
-
-	private static Pid getOrcid(List<StructuredProperty> p) {
-		for (StructuredProperty pid : p) {
-			if (pid.getQualifier().getClassid().equals(ModelConstants.ORCID)) {
-				Optional<DataInfo> di = Optional.ofNullable(pid.getDataInfo());
-				if (di.isPresent()) {
-					return Pid
-						.newInstance(
-							ControlledField
-								.newInstance(
-									pid.getQualifier().getClassid(),
-									pid.getValue()),
-							Provenance
-								.newInstance(
-									di.get().getProvenanceaction().getClassname(),
-									di.get().getTrust()));
-				} else {
-					return Pid
-						.newInstance(
-							ControlledField
-								.newInstance(
-									pid.getQualifier().getClassid(),
-									pid.getValue())
-
-						);
-				}
-
-			}
-		}
-		return null;
-	}
-
-}

dhp-common/src/main/java/eu/dnetlib/dhp/common/HdfsSupport.java

@@ -28,7 +28,7 @@ public class HdfsSupport {
 	 * @param configuration Configuration of hadoop env
 	 */
 	public static boolean exists(String path, Configuration configuration) {
-		logger.info("Removing path: {}", path);
+		logger.info("Checking existence for path: {}", path);
 		return rethrowAsRuntimeException(
 			() -> {
 				Path f = new Path(path);

dhp-common/src/main/java/eu/dnetlib/dhp/common/MDStoreInfo.java

@@ -0,0 +1,100 @@
+
+package eu.dnetlib.dhp.common;
+
+/**
+ * This utility represent the Metadata Store information
+ * needed during the migration from mongo to HDFS to store
+  */
+public class MDStoreInfo {
+	private String mdstore;
+	private String currentId;
+	private Long latestTimestamp;
+
+	/**
+	 * Instantiates a new Md store info.
+	 */
+	public MDStoreInfo() {
+	}
+
+	/**
+	 * Instantiates a new Md store info.
+	 *
+	 * @param mdstore         the mdstore
+	 * @param currentId       the current id
+	 * @param latestTimestamp the latest timestamp
+	 */
+	public MDStoreInfo(String mdstore, String currentId, Long latestTimestamp) {
+		this.mdstore = mdstore;
+		this.currentId = currentId;
+		this.latestTimestamp = latestTimestamp;
+	}
+
+	/**
+	 * Gets mdstore.
+	 *
+	 * @return the mdstore
+	 */
+	public String getMdstore() {
+		return mdstore;
+	}
+
+	/**
+	 * Sets mdstore.
+	 *
+	 * @param mdstore the mdstore
+	 * @return the mdstore
+	 */
+	public MDStoreInfo setMdstore(String mdstore) {
+		this.mdstore = mdstore;
+		return this;
+	}
+
+	/**
+	 * Gets current id.
+	 *
+	 * @return the current id
+	 */
+	public String getCurrentId() {
+		return currentId;
+	}
+
+	/**
+	 * Sets current id.
+	 *
+	 * @param currentId the current id
+	 * @return the current id
+	 */
+	public MDStoreInfo setCurrentId(String currentId) {
+		this.currentId = currentId;
+		return this;
+	}
+
+	/**
+	 * Gets latest timestamp.
+	 *
+	 * @return the latest timestamp
+	 */
+	public Long getLatestTimestamp() {
+		return latestTimestamp;
+	}
+
+	/**
+	 * Sets latest timestamp.
+	 *
+	 * @param latestTimestamp the latest timestamp
+	 * @return the latest timestamp
+	 */
+	public MDStoreInfo setLatestTimestamp(Long latestTimestamp) {
+		this.latestTimestamp = latestTimestamp;
+		return this;
+	}
+
+	@Override
+	public String toString() {
+		return "MDStoreInfo{" +
+			"mdstore='" + mdstore + '\'' +
+			", currentId='" + currentId + '\'' +
+			", latestTimestamp=" + latestTimestamp +
+			'}';
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/MakeTarArchive.java

@@ -5,47 +5,100 @@ import java.io.BufferedInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.Serializable;
+import java.util.Optional;
 
 import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
 import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
+import org.apache.commons.io.IOUtils;
+import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import eu.dnetlib.dhp.application.ArgumentApplicationParser;
 
 public class MakeTarArchive implements Serializable {
 
+	private static final Logger log = LoggerFactory.getLogger(MakeTarArchive.class);
+
+	public static void main(String[] args) throws Exception {
+		String jsonConfiguration = IOUtils
+			.toString(
+				MakeTarArchive.class
+					.getResourceAsStream(
+						"/eu/dnetlib/dhp/common/input_maketar_parameters.json"));
+
+		final ArgumentApplicationParser parser = new ArgumentApplicationParser(jsonConfiguration);
+		parser.parseArgument(args);
+
+		final String outputPath = parser.get("hdfsPath");
+		log.info("hdfsPath: {}", outputPath);
+
+		final String hdfsNameNode = parser.get("nameNode");
+		log.info("nameNode: {}", hdfsNameNode);
+
+		final String inputPath = parser.get("sourcePath");
+		log.info("input path : {}", inputPath);
+
+		final int gBperSplit = Optional
+			.ofNullable(parser.get("splitSize"))
+			.map(Integer::valueOf)
+			.orElse(10);
+
+		Configuration conf = new Configuration();
+		conf.set("fs.defaultFS", hdfsNameNode);
+
+		FileSystem fileSystem = FileSystem.get(conf);
+
+		makeTArArchive(fileSystem, inputPath, outputPath, gBperSplit);
+
+	}
+
+	public static void makeTArArchive(FileSystem fileSystem, String inputPath, String outputPath, int gBperSplit)
+		throws IOException {
+
+		RemoteIterator<LocatedFileStatus> dirIterator = fileSystem.listLocatedStatus(new Path(inputPath));
+
+		while (dirIterator.hasNext()) {
+			LocatedFileStatus fileStatus = dirIterator.next();
+
+			Path p = fileStatus.getPath();
+			String pathString = p.toString();
+			String entity = pathString.substring(pathString.lastIndexOf("/") + 1);
+
+			MakeTarArchive.tarMaxSize(fileSystem, pathString, outputPath + "/" + entity, entity, gBperSplit);
+		}
+	}
+
 	private static TarArchiveOutputStream getTar(FileSystem fileSystem, String outputPath) throws IOException {
 		Path hdfsWritePath = new Path(outputPath);
-		FSDataOutputStream fsDataOutputStream = null;
 		if (fileSystem.exists(hdfsWritePath)) {
 			fileSystem.delete(hdfsWritePath, true);
 
 		}
-		fsDataOutputStream = fileSystem.create(hdfsWritePath);
-
-		return new TarArchiveOutputStream(fsDataOutputStream.getWrappedStream());
+		return new TarArchiveOutputStream(fileSystem.create(hdfsWritePath).getWrappedStream());
 	}
 
-	private static void write(FileSystem fileSystem, String inputPath, String outputPath, String dir_name)
+	private static void write(FileSystem fileSystem, String inputPath, String outputPath, String dirName)
 		throws IOException {
 
 		Path hdfsWritePath = new Path(outputPath);
-		FSDataOutputStream fsDataOutputStream = null;
 		if (fileSystem.exists(hdfsWritePath)) {
 			fileSystem.delete(hdfsWritePath, true);
 
 		}
-		fsDataOutputStream = fileSystem.create(hdfsWritePath);
+		try (TarArchiveOutputStream ar = new TarArchiveOutputStream(
+			fileSystem.create(hdfsWritePath).getWrappedStream())) {
 
-		TarArchiveOutputStream ar = new TarArchiveOutputStream(fsDataOutputStream.getWrappedStream());
-
-		RemoteIterator<LocatedFileStatus> fileStatusListIterator = fileSystem
+			RemoteIterator<LocatedFileStatus> iterator = fileSystem
 				.listFiles(
 					new Path(inputPath), true);
 
-		while (fileStatusListIterator.hasNext()) {
-			writeCurrentFile(fileSystem, dir_name, fileStatusListIterator, ar, 0);
+			while (iterator.hasNext()) {
+				writeCurrentFile(fileSystem, dirName, iterator, ar, 0);
 			}
 
-		ar.close();
+		}
 	}
 
 	public static void tarMaxSize(FileSystem fileSystem, String inputPath, String outputPath, String dir_name,
@@ -64,35 +117,40 @@ public class MakeTarArchive implements Serializable {
 					new Path(inputPath), true);
 			boolean next = fileStatusListIterator.hasNext();
 			while (next) {
-				TarArchiveOutputStream ar = getTar(fileSystem, outputPath + "_" + (partNum + 1) + ".tar");
+				try (TarArchiveOutputStream ar = getTar(fileSystem, outputPath + "_" + (partNum + 1) + ".tar")) {
 
-				long current_size = 0;
-				while (next && current_size < bytesPerSplit) {
-					current_size = writeCurrentFile(fileSystem, dir_name, fileStatusListIterator, ar, current_size);
+					long currentSize = 0;
+					while (next && currentSize < bytesPerSplit) {
+						currentSize = writeCurrentFile(fileSystem, dir_name, fileStatusListIterator, ar, currentSize);
 						next = fileStatusListIterator.hasNext();
 
 					}
 
 					partNum += 1;
-				ar.close();
+				}
+			}
+		}
 	}
 
-		}
-
-	}
-
-	private static long writeCurrentFile(FileSystem fileSystem, String dir_name,
+	private static long writeCurrentFile(FileSystem fileSystem, String dirName,
 		RemoteIterator<LocatedFileStatus> fileStatusListIterator,
-		TarArchiveOutputStream ar, long current_size) throws IOException {
+		TarArchiveOutputStream ar, long currentSize) throws IOException {
 		LocatedFileStatus fileStatus = fileStatusListIterator.next();
 
 		Path p = fileStatus.getPath();
-		String p_string = p.toString();
-		if (!p_string.endsWith("_SUCCESS")) {
-			String name = p_string.substring(p_string.lastIndexOf("/") + 1);
-			TarArchiveEntry entry = new TarArchiveEntry(dir_name + "/" + name);
+		String pString = p.toString();
+		if (!pString.endsWith("_SUCCESS")) {
+			String name = pString.substring(pString.lastIndexOf("/") + 1);
+			if (name.startsWith("part-") & name.length() > 10) {
+				String tmp = name.substring(0, 10);
+				if (name.contains(".")) {
+					tmp += name.substring(name.indexOf("."));
+				}
+				name = tmp;
+			}
+			TarArchiveEntry entry = new TarArchiveEntry(dirName + "/" + name);
 			entry.setSize(fileStatus.getLen());
-			current_size += fileStatus.getLen();
+			currentSize += fileStatus.getLen();
 			ar.putArchiveEntry(entry);
 
 			InputStream is = fileSystem.open(fileStatus.getPath());
@@ -108,7 +166,7 @@ public class MakeTarArchive implements Serializable {
 			ar.closeArchiveEntry();
 
 		}
-		return current_size;
+		return currentSize;
 	}
 
 }

dhp-common/src/main/java/eu/dnetlib/dhp/common/MdstoreClient.java

@@ -1,17 +1,15 @@
 
 package eu.dnetlib.dhp.common;
 
+import static com.mongodb.client.model.Sorts.descending;
+
 import java.io.Closeable;
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Optional;
+import java.util.*;
+import java.util.stream.Collectors;
 import java.util.stream.StreamSupport;
 
 import org.apache.commons.lang3.StringUtils;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.bson.Document;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -21,6 +19,7 @@ import com.mongodb.BasicDBObject;
 import com.mongodb.MongoClient;
 import com.mongodb.MongoClientURI;
 import com.mongodb.QueryBuilder;
+import com.mongodb.client.FindIterable;
 import com.mongodb.client.MongoCollection;
 import com.mongodb.client.MongoDatabase;
 
@@ -39,6 +38,26 @@ public class MdstoreClient implements Closeable {
 		this.db = getDb(client, dbName);
 	}
 
+	private Long parseTimestamp(Document f) {
+		if (f == null || !f.containsKey("timestamp"))
+			return null;
+
+		Object ts = f.get("timestamp");
+
+		return Long.parseLong(ts.toString());
+	}
+
+	public Long getLatestTimestamp(final String collectionId) {
+		MongoCollection<Document> collection = db.getCollection(collectionId);
+		FindIterable<Document> result = collection.find().sort(descending("timestamp")).limit(1);
+		if (result == null) {
+			return null;
+		}
+
+		Document f = result.first();
+		return parseTimestamp(f);
+	}
+
 	public MongoCollection<Document> mdStore(final String mdId) {
 		BasicDBObject query = (BasicDBObject) QueryBuilder.start("mdId").is(mdId).get();
 
@@ -46,7 +65,7 @@ public class MdstoreClient implements Closeable {
 
 		final String currentId = Optional
 			.ofNullable(getColl(db, COLL_METADATA_MANAGER, true).find(query))
-			.map(r -> r.first())
+			.map(FindIterable::first)
 			.map(d -> d.getString("currentId"))
 			.orElseThrow(() -> new IllegalArgumentException("cannot find current mdstore id for: " + mdId));
 
@@ -55,6 +74,16 @@ public class MdstoreClient implements Closeable {
 		return getColl(db, currentId, true);
 	}
 
+	public List<MDStoreInfo> mdStoreWithTimestamp(final String mdFormat, final String mdLayout,
+		final String mdInterpretation) {
+		Map<String, String> res = validCollections(mdFormat, mdLayout, mdInterpretation);
+		return res
+			.entrySet()
+			.stream()
+			.map(e -> new MDStoreInfo(e.getKey(), e.getValue(), getLatestTimestamp(e.getValue())))
+			.collect(Collectors.toList());
+	}
+
 	public Map<String, String> validCollections(
 		final String mdFormat, final String mdLayout, final String mdInterpretation) {
 
@@ -84,7 +113,7 @@ public class MdstoreClient implements Closeable {
 		if (!Iterables.contains(client.listDatabaseNames(), dbName)) {
 			final String err = String.format("Database '%s' not found in %s", dbName, client.getAddress());
 			log.warn(err);
-			throw new RuntimeException(err);
+			throw new IllegalArgumentException(err);
 		}
 		return client.getDatabase(dbName);
 	}
@@ -97,7 +126,7 @@ public class MdstoreClient implements Closeable {
 					String.format("Missing collection '%s' in database '%s'", collName, db.getName()));
 			log.warn(err);
 			if (abortIfMissing) {
-				throw new RuntimeException(err);
+				throw new IllegalArgumentException(err);
 			} else {
 				return null;
 			}

dhp-common/src/main/java/eu/dnetlib/dhp/common/PacePerson.java

@@ -1,18 +1,18 @@
 
 package eu.dnetlib.dhp.common;
 
+import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.text.Normalizer;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
+import java.util.*;
+import java.util.stream.Collectors;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.text.WordUtils;
 
+import com.ctc.wstx.dtd.LargePrefixedNameSet;
 import com.google.common.base.Joiner;
 import com.google.common.base.Splitter;
-import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.google.common.hash.Hashing;
 
@@ -24,13 +24,24 @@ import com.google.common.hash.Hashing;
  */
 public class PacePerson {
 
-	private static final String UTF8 = "UTF-8";
 	private List<String> name = Lists.newArrayList();
 	private List<String> surname = Lists.newArrayList();
 	private List<String> fullname = Lists.newArrayList();
 	private final String original;
 
-	private static Set<String> particles = null;
+	private static Set<String> particles;
+
+	static {
+		try {
+			particles = new HashSet<>(IOUtils
+				.readLines(
+					PacePerson.class
+						.getResourceAsStream(
+							"/eu/dnetlib/dhp/common/name_particles.txt")));
+		} catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
 
 	/**
 	 * Capitalizes a string
@@ -38,29 +49,20 @@ public class PacePerson {
 	 * @param s the string to capitalize
 	 * @return the input string with capital letter
 	 */
-	public static final String capitalize(final String s) {
+	public static String capitalize(final String s) {
+		if (particles.contains(s)) {
+			return s;
+		}
 		return WordUtils.capitalize(s.toLowerCase(), ' ', '-');
 	}
 
 	/**
 	 * Adds a dot to a string with length equals to 1
 	 */
-	public static final String dotAbbreviations(final String s) {
+	public static String dotAbbreviations(final String s) {
 		return s.length() == 1 ? s + "." : s;
 	}
 
-	public static Set<String> loadFromClasspath(final String classpath) {
-		final Set<String> h = new HashSet<>();
-		try {
-			for (final String s : IOUtils.readLines(PacePerson.class.getResourceAsStream(classpath))) {
-				h.add(s);
-			}
-		} catch (final Throwable e) {
-			return new HashSet<>();
-		}
-		return h;
-	}
-
 	/**
 	 * The constructor of the class. It fills the fields of the class basing on the input fullname.
 	 *
@@ -129,10 +131,6 @@ public class PacePerson {
 	}
 
 	private List<String> splitTerms(final String s) {
-		if (particles == null) {
-			particles = loadFromClasspath("/eu/dnetlib/dhp/oa/graph/pace/name_particles.txt");
-		}
-
 		final List<String> list = Lists.newArrayList();
 		for (final String part : Splitter.on(" ").omitEmptyStrings().split(s)) {
 			if (!particles.contains(part.toLowerCase())) {
@@ -188,17 +186,36 @@ public class PacePerson {
 	}
 
 	public List<String> getCapitalFirstnames() {
-		return Lists
-			.newArrayList(
-				Iterables.transform(getNameWithAbbreviations(), PacePerson::capitalize));
+		return Optional
+			.ofNullable(getNameWithAbbreviations())
+			.map(
+				name -> name
+					.stream()
+					.map(PacePerson::capitalize)
+					.collect(Collectors.toList()))
+			.orElse(new ArrayList<>());
 	}
 
 	public List<String> getCapitalSurname() {
-		return Lists.newArrayList(Iterables.transform(surname, PacePerson::capitalize));
+		return Optional
+			.ofNullable(getSurname())
+			.map(
+				surname -> surname
+					.stream()
+					.map(PacePerson::capitalize)
+					.collect(Collectors.toList()))
+			.orElse(new ArrayList<>());
 	}
 
 	public List<String> getNameWithAbbreviations() {
-		return Lists.newArrayList(Iterables.transform(name, PacePerson::dotAbbreviations));
+		return Optional
+			.ofNullable(getName())
+			.map(
+				name -> name
+					.stream()
+					.map(PacePerson::dotAbbreviations)
+					.collect(Collectors.toList()))
+			.orElse(new ArrayList<>());
 	}
 
 	public boolean isAccurate() {

dhp-common/src/main/java/eu/dnetlib/dhp/common/action/ReadDatasourceMasterDuplicateFromDB.java

@@ -0,0 +1,81 @@
+
+package eu.dnetlib.dhp.common.action;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.nio.charset.StandardCharsets;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import eu.dnetlib.dhp.common.DbClient;
+import eu.dnetlib.dhp.common.action.model.MasterDuplicate;
+import eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils;
+
+public class ReadDatasourceMasterDuplicateFromDB {
+
+	private static final Logger log = LoggerFactory.getLogger(ReadDatasourceMasterDuplicateFromDB.class);
+
+	private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
+
+	private static final String QUERY = "SELECT distinct dd.id as masterId, d.officialname as masterName, dd.duplicate as duplicateId "
+		+
+		"FROM dsm_dedup_services dd join dsm_services d on (dd.id = d.id);";
+
+	public static int execute(String dbUrl, String dbUser, String dbPassword, String hdfsPath, String hdfsNameNode)
+		throws IOException {
+		int count = 0;
+		try (DbClient dbClient = new DbClient(dbUrl, dbUser, dbPassword)) {
+			Configuration conf = new Configuration();
+			conf.set("fs.defaultFS", hdfsNameNode);
+			FileSystem fileSystem = FileSystem.get(conf);
+			FSDataOutputStream fos = fileSystem.create(new Path(hdfsPath));
+
+			log.info("running query: {}", QUERY);
+			log.info("storing results in: {}", hdfsPath);
+
+			try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(fos, StandardCharsets.UTF_8))) {
+				dbClient.processResults(QUERY, rs -> writeMap(datasourceMasterMap(rs), writer));
+				count++;
+			}
+		}
+		return count;
+	}
+
+	private static MasterDuplicate datasourceMasterMap(ResultSet rs) {
+		try {
+			final MasterDuplicate md = new MasterDuplicate();
+
+			final String duplicateId = rs.getString("duplicateId");
+			final String masterId = rs.getString("masterId");
+			final String masterName = rs.getString("masterName");
+
+			md.setDuplicateId(OafMapperUtils.createOpenaireId(10, duplicateId, true));
+			md.setMasterId(OafMapperUtils.createOpenaireId(10, masterId, true));
+			md.setMasterName(masterName);
+
+			return md;
+		} catch (final SQLException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	private static void writeMap(final MasterDuplicate dm, final BufferedWriter writer) {
+		try {
+			writer.write(OBJECT_MAPPER.writeValueAsString(dm));
+			writer.newLine();
+		} catch (final IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/action/model/MasterDuplicate.java

@@ -0,0 +1,38 @@
+
+package eu.dnetlib.dhp.common.action.model;
+
+import java.io.Serializable;
+
+/**
+ * @author miriam.baglioni
+ * @Date 21/07/22
+ */
+public class MasterDuplicate implements Serializable {
+	private String duplicateId;
+	private String masterId;
+	private String masterName;
+
+	public String getDuplicateId() {
+		return duplicateId;
+	}
+
+	public void setDuplicateId(String duplicateId) {
+		this.duplicateId = duplicateId;
+	}
+
+	public String getMasterId() {
+		return masterId;
+	}
+
+	public void setMasterId(String masterId) {
+		this.masterId = masterId;
+	}
+
+	public String getMasterName() {
+		return masterName;
+	}
+
+	public void setMasterName(String masterName) {
+		this.masterName = masterName;
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/aggregation/AggregatorReport.java

@@ -0,0 +1,45 @@
+
+package eu.dnetlib.dhp.common.aggregation;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import eu.dnetlib.dhp.message.MessageSender;
+import eu.dnetlib.dhp.utils.DHPUtils;
+
+public class AggregatorReport extends LinkedHashMap<String, String> implements Closeable {
+
+	private static final Logger log = LoggerFactory.getLogger(AggregatorReport.class);
+
+	private transient MessageSender messageSender;
+
+	public AggregatorReport() {
+	}
+
+	public AggregatorReport(MessageSender messageSender) {
+		this.messageSender = messageSender;
+	}
+
+	public void ongoing(Long current, Long total) {
+		messageSender.sendMessage(current, total);
+	}
+
+	@Override
+	public void close() throws IOException {
+		if (Objects.nonNull(messageSender)) {
+			log.info("closing report: ");
+			this.forEach((k, v) -> log.info("{} - {}", k, v));
+
+			Map<String, String> m = new HashMap<>();
+			m.put(getClass().getSimpleName().toLowerCase(), DHPUtils.MAPPER.writeValueAsString(values()));
+			messageSender.sendReport(m);
+		}
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/ZenodoAPIClient.java

@@ -3,8 +3,14 @@ package eu.dnetlib.dhp.common.api;
 
 import java.io.*;
 import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.URL;
 import java.util.concurrent.TimeUnit;
 
+import org.apache.http.HttpHeaders;
+import org.apache.http.entity.ContentType;
+import org.jetbrains.annotations.NotNull;
+
 import com.google.gson.Gson;
 
 import eu.dnetlib.dhp.common.api.zenodo.ZenodoModel;
@@ -43,7 +49,7 @@ public class ZenodoAPIClient implements Serializable {
 		this.deposition_id = deposition_id;
 	}
 
-	public ZenodoAPIClient(String urlString, String access_token) throws IOException {
+	public ZenodoAPIClient(String urlString, String access_token) {
 
 		this.urlString = urlString;
 		this.access_token = access_token;
@@ -57,33 +63,31 @@ public class ZenodoAPIClient implements Serializable {
 	 */
 	public int newDeposition() throws IOException {
 		String json = "{}";
-		OkHttpClient httpClient = new OkHttpClient.Builder().connectTimeout(600, TimeUnit.SECONDS).build();
 
-		RequestBody body = RequestBody.create(json, MEDIA_TYPE_JSON);
+		URL url = new URL(urlString);
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+		conn.setRequestProperty(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
+		conn.setRequestProperty(HttpHeaders.AUTHORIZATION, "Bearer " + access_token);
+		conn.setRequestMethod("POST");
+		conn.setDoOutput(true);
+		try (OutputStream os = conn.getOutputStream()) {
+			byte[] input = json.getBytes("utf-8");
+			os.write(input, 0, input.length);
+		}
 
-		Request request = new Request.Builder()
-			.url(urlString)
-			.addHeader("Content-Type", "application/json") // add request headers
-			.addHeader("Authorization", "Bearer " + access_token)
-			.post(body)
-			.build();
+		String body = getBody(conn);
 
-		try (Response response = httpClient.newCall(request).execute()) {
+		int responseCode = conn.getResponseCode();
+		conn.disconnect();
 
-			if (!response.isSuccessful())
-				throw new IOException("Unexpected code " + response + response.body().string());
+		if (!checkOKStatus(responseCode))
+			throw new IOException("Unexpected code " + responseCode + body);
 
-			// Get response body
-			json = response.body().string();
-
-			ZenodoModel newSubmission = new Gson().fromJson(json, ZenodoModel.class);
+		ZenodoModel newSubmission = new Gson().fromJson(body, ZenodoModel.class);
 		this.bucket = newSubmission.getLinks().getBucket();
 		this.deposition_id = newSubmission.getId();
 
-			return response.code();
-
-		}
-
+		return responseCode;
 	}
 
 	/**
@@ -91,28 +95,48 @@ public class ZenodoAPIClient implements Serializable {
 	 *
 	 * @param is the inputStream for the file to upload
 	 * @param file_name the name of the file as it will appear on Zenodo
-	 * @param len the size of the file
 	 * @return the response code
 	 */
-	public int uploadIS(InputStream is, String file_name, long len) throws IOException {
-		OkHttpClient httpClient = new OkHttpClient.Builder()
-			.writeTimeout(600, TimeUnit.SECONDS)
-			.readTimeout(600, TimeUnit.SECONDS)
-			.connectTimeout(600, TimeUnit.SECONDS)
-			.build();
+	public int uploadIS(InputStream is, String file_name) throws IOException {
 
-		Request request = new Request.Builder()
-			.url(bucket + "/" + file_name)
-			.addHeader("Content-Type", "application/zip") // add request headers
-			.addHeader("Authorization", "Bearer " + access_token)
-			.put(InputStreamRequestBody.create(MEDIA_TYPE_ZIP, is, len))
-			.build();
+		URL url = new URL(bucket + "/" + file_name);
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+		conn.setRequestProperty(HttpHeaders.CONTENT_TYPE, "application/zip");
+		conn.setRequestProperty(HttpHeaders.AUTHORIZATION, "Bearer " + access_token);
+		conn.setDoOutput(true);
+		conn.setRequestMethod("PUT");
 
-		try (Response response = httpClient.newCall(request).execute()) {
-			if (!response.isSuccessful())
-				throw new IOException("Unexpected code " + response + response.body().string());
-			return response.code();
+		byte[] buf = new byte[8192];
+		int length;
+		try (OutputStream os = conn.getOutputStream()) {
+			while ((length = is.read(buf)) != -1) {
+				os.write(buf, 0, length);
 			}
+
+		}
+		int responseCode = conn.getResponseCode();
+		if (!checkOKStatus(responseCode)) {
+			throw new IOException("Unexpected code " + responseCode + getBody(conn));
+		}
+
+		return responseCode;
+	}
+
+	@NotNull
+	private String getBody(HttpURLConnection conn) throws IOException {
+		String body = "{}";
+		try (BufferedReader br = new BufferedReader(
+			new InputStreamReader(conn.getInputStream(), "utf-8"))) {
+			StringBuilder response = new StringBuilder();
+			String responseLine = null;
+			while ((responseLine = br.readLine()) != null) {
+				response.append(responseLine.trim());
+			}
+
+			body = response.toString();
+
+		}
+		return body;
 	}
 
 	/**
@@ -124,26 +148,34 @@ public class ZenodoAPIClient implements Serializable {
 	 */
 	public int sendMretadata(String metadata) throws IOException {
 
-		OkHttpClient httpClient = new OkHttpClient.Builder().connectTimeout(600, TimeUnit.SECONDS).build();
+		URL url = new URL(urlString + "/" + deposition_id);
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+		conn.setRequestProperty(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
+		conn.setRequestProperty(HttpHeaders.AUTHORIZATION, "Bearer " + access_token);
+		conn.setDoOutput(true);
+		conn.setRequestMethod("PUT");
 
-		RequestBody body = RequestBody.create(metadata, MEDIA_TYPE_JSON);
-
-		Request request = new Request.Builder()
-			.url(urlString + "/" + deposition_id)
-			.addHeader("Content-Type", "application/json") // add request headers
-			.addHeader("Authorization", "Bearer " + access_token)
-			.put(body)
-			.build();
-
-		try (Response response = httpClient.newCall(request).execute()) {
-
-			if (!response.isSuccessful())
-				throw new IOException("Unexpected code " + response + response.body().string());
-
-			return response.code();
+		try (OutputStream os = conn.getOutputStream()) {
+			byte[] input = metadata.getBytes("utf-8");
+			os.write(input, 0, input.length);
 
 		}
 
+		final int responseCode = conn.getResponseCode();
+		conn.disconnect();
+		if (!checkOKStatus(responseCode))
+			throw new IOException("Unexpected code " + responseCode + getBody(conn));
+
+		return responseCode;
+
+	}
+
+	private boolean checkOKStatus(int responseCode) {
+
+		if (HttpURLConnection.HTTP_OK != responseCode ||
+			HttpURLConnection.HTTP_CREATED != responseCode)
+			return true;
+		return false;
 	}
 
 	/**
@@ -152,6 +184,7 @@ public class ZenodoAPIClient implements Serializable {
 	 * @return response code
 	 * @throws IOException
 	 */
+	@Deprecated
 	public int publish() throws IOException {
 
 		String json = "{}";
@@ -184,35 +217,39 @@ public class ZenodoAPIClient implements Serializable {
 	 *            part of the url for the DOI Zenodo suggests to use to cite all versions: DOI: 10.xxx/zenodo.656930
 	 *            concept_rec_id = 656930
 	 * @return response code
-	 * @throws IOException
-	 * @throws MissingConceptDoiException
 	 */
 	public int newVersion(String concept_rec_id) throws IOException, MissingConceptDoiException {
-		setDepositionId(concept_rec_id);
+		setDepositionId(concept_rec_id, 1);
 		String json = "{}";
 
-		OkHttpClient httpClient = new OkHttpClient.Builder().connectTimeout(600, TimeUnit.SECONDS).build();
+		URL url = new URL(urlString + "/" + deposition_id + "/actions/newversion");
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 
-		RequestBody body = RequestBody.create(json, MEDIA_TYPE_JSON);
+		conn.setRequestProperty(HttpHeaders.AUTHORIZATION, "Bearer " + access_token);
+		conn.setDoOutput(true);
+		conn.setRequestMethod("POST");
 
-		Request request = new Request.Builder()
-			.url(urlString + "/" + deposition_id + "/actions/newversion")
-			.addHeader("Authorization", "Bearer " + access_token)
-			.post(body)
-			.build();
+		try (OutputStream os = conn.getOutputStream()) {
+			byte[] input = json.getBytes("utf-8");
+			os.write(input, 0, input.length);
 
-		try (Response response = httpClient.newCall(request).execute()) {
+		}
 
-			if (!response.isSuccessful())
-				throw new IOException("Unexpected code " + response + response.body().string());
+		String body = getBody(conn);
 
-			ZenodoModel zenodoModel = new Gson().fromJson(response.body().string(), ZenodoModel.class);
+		int responseCode = conn.getResponseCode();
+
+		conn.disconnect();
+		if (!checkOKStatus(responseCode))
+			throw new IOException("Unexpected code " + responseCode + body);
+
+		ZenodoModel zenodoModel = new Gson().fromJson(body, ZenodoModel.class);
 		String latest_draft = zenodoModel.getLinks().getLatest_draft();
 		deposition_id = latest_draft.substring(latest_draft.lastIndexOf("/") + 1);
 		bucket = getBucket(latest_draft);
-			return response.code();
 
-		}
+		return responseCode;
+
 	}
 
 	/**
@@ -230,29 +267,38 @@ public class ZenodoAPIClient implements Serializable {
 
 		this.deposition_id = deposition_id;
 
-		OkHttpClient httpClient = new OkHttpClient.Builder().connectTimeout(600, TimeUnit.SECONDS).build();
+		String json = "{}";
 
-		Request request = new Request.Builder()
-			.url(urlString + "/" + deposition_id)
-			.addHeader("Authorization", "Bearer " + access_token)
-			.build();
+		URL url = new URL(urlString + "/" + deposition_id);
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 
-		try (Response response = httpClient.newCall(request).execute()) {
+		conn.setRequestProperty(HttpHeaders.AUTHORIZATION, "Bearer " + access_token);
+		conn.setRequestMethod("POST");
+		conn.setDoOutput(true);
+		try (OutputStream os = conn.getOutputStream()) {
+			byte[] input = json.getBytes("utf-8");
+			os.write(input, 0, input.length);
+		}
 
-			if (!response.isSuccessful())
-				throw new IOException("Unexpected code " + response + response.body().string());
+		String body = getBody(conn);
 
-			ZenodoModel zenodoModel = new Gson().fromJson(response.body().string(), ZenodoModel.class);
+		int responseCode = conn.getResponseCode();
+		conn.disconnect();
+
+		if (!checkOKStatus(responseCode))
+			throw new IOException("Unexpected code " + responseCode + body);
+
+		ZenodoModel zenodoModel = new Gson().fromJson(body, ZenodoModel.class);
 		bucket = zenodoModel.getLinks().getBucket();
-			return response.code();
+
+		return responseCode;
 
 	}
 
-	}
+	private void setDepositionId(String concept_rec_id, Integer page) throws IOException, MissingConceptDoiException {
 
-	private void setDepositionId(String concept_rec_id) throws IOException, MissingConceptDoiException {
-
-		ZenodoModelList zenodoModelList = new Gson().fromJson(getPrevDepositions(), ZenodoModelList.class);
+		ZenodoModelList zenodoModelList = new Gson()
+			.fromJson(getPrevDepositions(String.valueOf(page)), ZenodoModelList.class);
 
 		for (ZenodoModel zm : zenodoModelList) {
 			if (zm.getConceptrecid().equals(concept_rec_id)) {
@@ -260,56 +306,58 @@ public class ZenodoAPIClient implements Serializable {
 				return;
 			}
 		}
-
-		throw new MissingConceptDoiException("The concept record id specified was missing in the list of depositions");
+		if (zenodoModelList.size() == 0)
+			throw new MissingConceptDoiException(
+				"The concept record id specified was missing in the list of depositions");
+		setDepositionId(concept_rec_id, page + 1);
 
 	}
 
-	private String getPrevDepositions() throws IOException {
-		OkHttpClient httpClient = new OkHttpClient.Builder().connectTimeout(600, TimeUnit.SECONDS).build();
+	private String getPrevDepositions(String page) throws IOException {
 
-		Request request = new Request.Builder()
-			.url(urlString)
-			.addHeader("Content-Type", "application/json") // add request headers
-			.addHeader("Authorization", "Bearer " + access_token)
-			.get()
-			.build();
+		HttpUrl.Builder urlBuilder = HttpUrl.parse(urlString).newBuilder();
+		urlBuilder.addQueryParameter("page", page);
 
-		try (Response response = httpClient.newCall(request).execute()) {
+		URL url = new URL(urlBuilder.build().toString());
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+		conn.setRequestProperty(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
+		conn.setRequestProperty(HttpHeaders.AUTHORIZATION, "Bearer " + access_token);
+		conn.setDoOutput(true);
+		conn.setRequestMethod("GET");
 
-			if (!response.isSuccessful())
-				throw new IOException("Unexpected code " + response + response.body().string());
+		String body = getBody(conn);
 
-			return response.body().string();
+		int responseCode = conn.getResponseCode();
+
+		conn.disconnect();
+		if (!checkOKStatus(responseCode))
+			throw new IOException("Unexpected code " + responseCode + body);
+
+		return body;
 
 	}
 
-	}
+	private String getBucket(String inputUurl) throws IOException {
 
-	private String getBucket(String url) throws IOException {
-		OkHttpClient httpClient = new OkHttpClient.Builder()
-			.connectTimeout(600, TimeUnit.SECONDS)
-			.build();
+		URL url = new URL(inputUurl);
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+		conn.setRequestProperty(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
+		conn.setRequestProperty(HttpHeaders.AUTHORIZATION, "Bearer " + access_token);
+		conn.setDoOutput(true);
+		conn.setRequestMethod("GET");
 
-		Request request = new Request.Builder()
-			.url(url)
-			.addHeader("Content-Type", "application/json") // add request headers
-			.addHeader("Authorization", "Bearer " + access_token)
-			.get()
-			.build();
+		String body = getBody(conn);
 
-		try (Response response = httpClient.newCall(request).execute()) {
+		int responseCode = conn.getResponseCode();
 
-			if (!response.isSuccessful())
-				throw new IOException("Unexpected code " + response + response.body().string());
+		conn.disconnect();
+		if (!checkOKStatus(responseCode))
+			throw new IOException("Unexpected code " + responseCode + body);
 
-			// Get response body
-			ZenodoModel zenodoModel = new Gson().fromJson(response.body().string(), ZenodoModel.class);
+		ZenodoModel zenodoModel = new Gson().fromJson(body, ZenodoModel.class);
 
 		return zenodoModel.getLinks().getBucket();
 
 	}
 
 }
-
-}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/context/CategorySummary.java

@@ -0,0 +1,39 @@
+
+package eu.dnetlib.dhp.common.api.context;
+
+public class CategorySummary {
+
+	private String id;
+
+	private String label;
+
+	private boolean hasConcept;
+
+	public String getId() {
+		return id;
+	}
+
+	public String getLabel() {
+		return label;
+	}
+
+	public boolean isHasConcept() {
+		return hasConcept;
+	}
+
+	public CategorySummary setId(final String id) {
+		this.id = id;
+		return this;
+	}
+
+	public CategorySummary setLabel(final String label) {
+		this.label = label;
+		return this;
+	}
+
+	public CategorySummary setHasConcept(final boolean hasConcept) {
+		this.hasConcept = hasConcept;
+		return this;
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/context/CategorySummaryList.java

@@ -0,0 +1,7 @@
+
+package eu.dnetlib.dhp.common.api.context;
+
+import java.util.ArrayList;
+
+public class CategorySummaryList extends ArrayList<CategorySummary> {
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/context/ConceptSummary.java

@@ -0,0 +1,52 @@
+
+package eu.dnetlib.dhp.common.api.context;
+
+import java.util.List;
+
+public class ConceptSummary {
+
+	private String id;
+
+	private String label;
+
+	public boolean hasSubConcept;
+
+	private List<ConceptSummary> concepts;
+
+	public String getId() {
+		return id;
+	}
+
+	public String getLabel() {
+		return label;
+	}
+
+	public List<ConceptSummary> getConcepts() {
+		return concepts;
+	}
+
+	public ConceptSummary setId(final String id) {
+		this.id = id;
+		return this;
+	}
+
+	public ConceptSummary setLabel(final String label) {
+		this.label = label;
+		return this;
+	}
+
+	public boolean isHasSubConcept() {
+		return hasSubConcept;
+	}
+
+	public ConceptSummary setHasSubConcept(final boolean hasSubConcept) {
+		this.hasSubConcept = hasSubConcept;
+		return this;
+	}
+
+	public ConceptSummary setConcept(final List<ConceptSummary> concepts) {
+		this.concepts = concepts;
+		return this;
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/context/ConceptSummaryList.java

@@ -0,0 +1,7 @@
+
+package eu.dnetlib.dhp.common.api.context;
+
+import java.util.ArrayList;
+
+public class ConceptSummaryList extends ArrayList<ConceptSummary> {
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/context/ContextSummary.java

@@ -0,0 +1,50 @@
+
+package eu.dnetlib.dhp.common.api.context;
+
+public class ContextSummary {
+
+	private String id;
+
+	private String label;
+
+	private String type;
+
+	private String status;
+
+	public String getId() {
+		return id;
+	}
+
+	public String getLabel() {
+		return label;
+	}
+
+	public String getType() {
+		return type;
+	}
+
+	public String getStatus() {
+		return status;
+	}
+
+	public ContextSummary setId(final String id) {
+		this.id = id;
+		return this;
+	}
+
+	public ContextSummary setLabel(final String label) {
+		this.label = label;
+		return this;
+	}
+
+	public ContextSummary setType(final String type) {
+		this.type = type;
+		return this;
+	}
+
+	public ContextSummary setStatus(final String status) {
+		this.status = status;
+		return this;
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/context/ContextSummaryList.java

@@ -0,0 +1,7 @@
+
+package eu.dnetlib.dhp.common.api.context;
+
+import java.util.ArrayList;
+
+public class ContextSummaryList extends ArrayList<ContextSummary> {
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/zenodo/Creator.java

@@ -32,13 +32,13 @@ public class Creator {
 
 	public static Creator newInstance(String name, String affiliation, String orcid) {
 		Creator c = new Creator();
-		if (!(name == null)) {
+		if (name != null) {
 			c.name = name;
 		}
-		if (!(affiliation == null)) {
+		if (affiliation != null) {
 			c.affiliation = affiliation;
 		}
-		if (!(orcid == null)) {
+		if (orcid != null) {
 			c.orcid = orcid;
 		}
 

dhp-common/src/main/java/eu/dnetlib/dhp/common/api/zenodo/File.java

@@ -3,17 +3,12 @@ package eu.dnetlib.dhp.common.api.zenodo;
 
 import java.io.Serializable;
 
-import net.minidev.json.annotate.JsonIgnore;
-
 public class File implements Serializable {
 	private String checksum;
 	private String filename;
 	private long filesize;
 	private String id;
 
-	@JsonIgnore
-	// private Links links;
-
 	public String getChecksum() {
 		return checksum;
 	}
@@ -46,13 +41,4 @@ public class File implements Serializable {
 		this.id = id;
 	}
 
-//    @JsonIgnore
-//    public Links getLinks() {
-//        return links;
-//    }
-//
-//    @JsonIgnore
-//    public void setLinks(Links links) {
-//        this.links = links;
-//    }
 }

dhp-common/src/main/java/eu/dnetlib/dhp/common/collection/CollectorException.java

@@ -0,0 +1,32 @@
+
+package eu.dnetlib.dhp.common.collection;
+
+public class CollectorException extends Exception {
+
+	/** */
+	private static final long serialVersionUID = -290723075076039757L;
+
+	public CollectorException() {
+		super();
+	}
+
+	public CollectorException(
+		final String message,
+		final Throwable cause,
+		final boolean enableSuppression,
+		final boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+	public CollectorException(final String message, final Throwable cause) {
+		super(message, cause);
+	}
+
+	public CollectorException(final String message) {
+		super(message);
+	}
+
+	public CollectorException(final Throwable cause) {
+		super(cause);
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/collection/DecompressTarGz.java

@@ -0,0 +1,40 @@
+
+package eu.dnetlib.dhp.common.collection;
+
+import java.io.BufferedOutputStream;
+import java.io.IOException;
+import java.util.zip.GZIPOutputStream;
+
+import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
+import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
+import org.apache.commons.io.IOUtils;
+import org.apache.hadoop.fs.FSDataInputStream;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+
+public class DecompressTarGz {
+
+	public static void doExtract(FileSystem fs, String outputPath, String tarGzPath) throws IOException {
+
+		FSDataInputStream inputFileStream = fs.open(new Path(tarGzPath));
+		try (TarArchiveInputStream tais = new TarArchiveInputStream(
+			new GzipCompressorInputStream(inputFileStream))) {
+			TarArchiveEntry entry = null;
+			while ((entry = tais.getNextTarEntry()) != null) {
+				if (!entry.isDirectory()) {
+					try (
+						FSDataOutputStream out = fs
+							.create(new Path(outputPath.concat(entry.getName()).concat(".gz")));
+						GZIPOutputStream gzipOs = new GZIPOutputStream(new BufferedOutputStream(out))) {
+
+						IOUtils.copy(tais, gzipOs);
+
+					}
+
+				}
+			}
+		}
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/collection/GetCSV.java

@@ -0,0 +1,56 @@
+
+package eu.dnetlib.dhp.common.collection;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.opencsv.bean.CsvToBeanBuilder;
+
+public class GetCSV {
+
+	public static final char DEFAULT_DELIMITER = ',';
+
+	private GetCSV() {
+	}
+
+	public static void getCsv(FileSystem fileSystem, BufferedReader reader, String hdfsPath,
+		String modelClass) throws IOException, ClassNotFoundException {
+		getCsv(fileSystem, reader, hdfsPath, modelClass, DEFAULT_DELIMITER);
+	}
+
+	public static void getCsv(FileSystem fileSystem, Reader reader, String hdfsPath,
+		String modelClass, char delimiter) throws IOException, ClassNotFoundException {
+
+		Path hdfsWritePath = new Path(hdfsPath);
+		FSDataOutputStream fsDataOutputStream = null;
+		if (fileSystem.exists(hdfsWritePath)) {
+			fileSystem.delete(hdfsWritePath, false);
+		}
+		fsDataOutputStream = fileSystem.create(hdfsWritePath);
+
+		try (BufferedWriter writer = new BufferedWriter(
+			new OutputStreamWriter(fsDataOutputStream, StandardCharsets.UTF_8))) {
+
+			final ObjectMapper mapper = new ObjectMapper();
+
+			@SuppressWarnings("unchecked")
+			final List lines = new CsvToBeanBuilder(reader)
+				.withType(Class.forName(modelClass))
+				.withSeparator(delimiter)
+				.build()
+				.parse();
+
+			for (Object line : lines) {
+				writer.write(mapper.writeValueAsString(line));
+				writer.newLine();
+			}
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/collection/HttpClientParams.java

@@ -0,0 +1,127 @@
+
+package eu.dnetlib.dhp.common.collection;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Bundles the http connection parameters driving the client behaviour.
+ */
+public class HttpClientParams {
+
+	// Defaults
+	public static int _maxNumberOfRetry = 3;
+	public static int _requestDelay = 0; // milliseconds
+	public static int _retryDelay = 10; // seconds
+	public static int _connectTimeOut = 10; // seconds
+	public static int _readTimeOut = 30; // seconds
+
+	public static String _requestMethod = "GET";
+
+	/**
+	 * Maximum number of allowed retires before failing
+	 */
+	private int maxNumberOfRetry;
+
+	/**
+	 * Delay between request (Milliseconds)
+	 */
+	private int requestDelay;
+
+	/**
+	 * Time to wait after a failure before retrying (Seconds)
+	 */
+	private int retryDelay;
+
+	/**
+	 * Connect timeout (Seconds)
+	 */
+	private int connectTimeOut;
+
+	/**
+	 * Read timeout (Seconds)
+	 */
+	private int readTimeOut;
+
+	/**
+	 * Custom http headers
+	 */
+	private Map<String, String> headers;
+
+	/**
+	 * Request method (i.e., GET, POST etc)
+	 */
+	private String requestMethod;
+
+	public HttpClientParams() {
+		this(_maxNumberOfRetry, _requestDelay, _retryDelay, _connectTimeOut, _readTimeOut, new HashMap<>(),
+			_requestMethod);
+	}
+
+	public HttpClientParams(int maxNumberOfRetry, int requestDelay, int retryDelay, int connectTimeOut,
+		int readTimeOut, Map<String, String> headers, String requestMethod) {
+		this.maxNumberOfRetry = maxNumberOfRetry;
+		this.requestDelay = requestDelay;
+		this.retryDelay = retryDelay;
+		this.connectTimeOut = connectTimeOut;
+		this.readTimeOut = readTimeOut;
+		this.headers = headers;
+		this.requestMethod = requestMethod;
+	}
+
+	public int getMaxNumberOfRetry() {
+		return maxNumberOfRetry;
+	}
+
+	public void setMaxNumberOfRetry(int maxNumberOfRetry) {
+		this.maxNumberOfRetry = maxNumberOfRetry;
+	}
+
+	public int getRequestDelay() {
+		return requestDelay;
+	}
+
+	public void setRequestDelay(int requestDelay) {
+		this.requestDelay = requestDelay;
+	}
+
+	public int getRetryDelay() {
+		return retryDelay;
+	}
+
+	public void setRetryDelay(int retryDelay) {
+		this.retryDelay = retryDelay;
+	}
+
+	public void setConnectTimeOut(int connectTimeOut) {
+		this.connectTimeOut = connectTimeOut;
+	}
+
+	public int getConnectTimeOut() {
+		return connectTimeOut;
+	}
+
+	public int getReadTimeOut() {
+		return readTimeOut;
+	}
+
+	public void setReadTimeOut(int readTimeOut) {
+		this.readTimeOut = readTimeOut;
+	}
+
+	public Map<String, String> getHeaders() {
+		return headers;
+	}
+
+	public void setHeaders(Map<String, String> headers) {
+		this.headers = headers;
+	}
+
+	public String getRequestMethod() {
+		return requestMethod;
+	}
+
+	public void setRequestMethod(String requestMethod) {
+		this.requestMethod = requestMethod;
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/collection/HttpConnector2.java

@@ -0,0 +1,309 @@
+
+package eu.dnetlib.dhp.common.collection;
+
+import static eu.dnetlib.dhp.utils.DHPUtils.*;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.*;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.math.NumberUtils;
+import org.apache.http.HttpHeaders;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import eu.dnetlib.dhp.common.Constants;
+import eu.dnetlib.dhp.common.aggregation.AggregatorReport;
+
+/**
+ * Migrated from https://svn.driver.research-infrastructures.eu/driver/dnet45/modules/dnet-modular-collector-service/trunk/src/main/java/eu/dnetlib/data/collector/plugins/HttpConnector.java
+ *
+ * @author jochen, michele, andrea, alessia, claudio, andreas
+ */
+public class HttpConnector2 {
+
+	private static final Logger log = LoggerFactory.getLogger(HttpConnector2.class);
+
+	private static final String REPORT_PREFIX = "http:";
+
+	private HttpClientParams clientParams;
+
+	private String responseType = null;
+
+	private static final String userAgent = "Mozilla/5.0 (compatible; OAI; +http://www.openaire.eu)";
+
+	public HttpConnector2() {
+		this(new HttpClientParams());
+	}
+
+	public HttpConnector2(HttpClientParams clientParams) {
+		this.clientParams = clientParams;
+		CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ALL));
+	}
+
+	/**
+	 * @see HttpConnector2#getInputSource(java.lang.String, AggregatorReport)
+	 */
+	public InputStream getInputSourceAsStream(final String requestUrl) throws CollectorException {
+		return IOUtils.toInputStream(getInputSource(requestUrl));
+	}
+
+	/**
+	 * @see HttpConnector2#getInputSource(java.lang.String, AggregatorReport)
+	 */
+	public String getInputSource(final String requestUrl) throws CollectorException {
+		return attemptDownloadAsString(requestUrl, 1, new AggregatorReport());
+	}
+
+	/**
+	 * Given the URL returns the content via HTTP GET
+	 *
+	 * @param requestUrl the URL
+	 * @param report the list of errors
+	 * @return the content of the downloaded resource
+	 * @throws CollectorException when retrying more than maxNumberOfRetry times
+	 */
+	public String getInputSource(final String requestUrl, AggregatorReport report)
+		throws CollectorException {
+		return attemptDownloadAsString(requestUrl, 1, report);
+	}
+
+	private String attemptDownloadAsString(final String requestUrl, final int retryNumber,
+		final AggregatorReport report) throws CollectorException {
+
+		try (InputStream s = attemptDownload(requestUrl, retryNumber, report)) {
+			return IOUtils.toString(s);
+		} catch (IOException e) {
+			log.error(e.getMessage(), e);
+			throw new CollectorException(e);
+		}
+	}
+
+	private InputStream attemptDownload(final String requestUrl, final int retryNumber,
+		final AggregatorReport report) throws CollectorException, IOException {
+
+		if (retryNumber > getClientParams().getMaxNumberOfRetry()) {
+			final String msg = String
+				.format(
+					"Max number of retries (%s/%s) exceeded, failing.",
+					retryNumber, getClientParams().getMaxNumberOfRetry());
+			log.error(msg);
+			throw new CollectorException(msg);
+		}
+
+		InputStream input = null;
+
+		long start = System.currentTimeMillis();
+		try {
+			if (getClientParams().getRequestDelay() > 0) {
+				backoffAndSleep(getClientParams().getRequestDelay());
+			}
+
+			log.info("Request attempt {} [{}]", retryNumber, requestUrl);
+
+			final HttpURLConnection urlConn = (HttpURLConnection) new URL(requestUrl).openConnection();
+			urlConn.setInstanceFollowRedirects(false);
+			urlConn.setReadTimeout(getClientParams().getReadTimeOut() * 1000);
+			urlConn.setConnectTimeout(getClientParams().getConnectTimeOut() * 1000);
+			urlConn.addRequestProperty(HttpHeaders.USER_AGENT, userAgent);
+			urlConn.setRequestMethod(getClientParams().getRequestMethod());
+
+			// if provided, add custom headers
+			if (!getClientParams().getHeaders().isEmpty()) {
+				for (Map.Entry<String, String> headerEntry : getClientParams().getHeaders().entrySet()) {
+					urlConn.addRequestProperty(headerEntry.getKey(), headerEntry.getValue());
+				}
+			}
+
+			logHeaderFields(urlConn);
+
+			int retryAfter = obtainRetryAfter(urlConn.getHeaderFields());
+			String rateLimit = urlConn.getHeaderField(Constants.HTTPHEADER_IETF_DRAFT_RATELIMIT_LIMIT);
+			String rateRemaining = urlConn.getHeaderField(Constants.HTTPHEADER_IETF_DRAFT_RATELIMIT_REMAINING);
+
+			if ((rateLimit != null) && (rateRemaining != null) && (Integer.parseInt(rateRemaining) < 2)) {
+				if (retryAfter > 0) {
+					backoffAndSleep(retryAfter);
+				} else {
+					backoffAndSleep(1000);
+				}
+			}
+
+			if (is2xx(urlConn.getResponseCode())) {
+				return getInputStream(urlConn, start);
+			}
+			if (is3xx(urlConn.getResponseCode())) {
+				// REDIRECTS
+				final String newUrl = obtainNewLocation(urlConn.getHeaderFields());
+				log.info("The requested url has been moved to {}", newUrl);
+				report
+					.put(
+						REPORT_PREFIX + urlConn.getResponseCode(),
+						String.format("Moved to: %s", newUrl));
+				logRequestTime(start);
+				urlConn.disconnect();
+				if (retryAfter > 0) {
+					backoffAndSleep(retryAfter);
+				}
+				return attemptDownload(newUrl, retryNumber + 1, report);
+			}
+			if (is4xx(urlConn.getResponseCode()) || is5xx(urlConn.getResponseCode())) {
+				switch (urlConn.getResponseCode()) {
+					case HttpURLConnection.HTTP_NOT_FOUND:
+					case HttpURLConnection.HTTP_BAD_GATEWAY:
+					case HttpURLConnection.HTTP_UNAVAILABLE:
+					case HttpURLConnection.HTTP_GATEWAY_TIMEOUT:
+						if (retryAfter > 0) {
+							log
+								.warn(
+									"waiting and repeating request after suggested retry-after {} sec for URL {}",
+									retryAfter, requestUrl);
+							backoffAndSleep(retryAfter * 1000);
+						} else {
+							log
+								.warn(
+									"waiting and repeating request after default delay of {} sec for URL {}",
+									getClientParams().getRetryDelay(), requestUrl);
+							backoffAndSleep(retryNumber * getClientParams().getRetryDelay());
+						}
+						report.put(REPORT_PREFIX + urlConn.getResponseCode(), requestUrl);
+
+						logRequestTime(start);
+
+						urlConn.disconnect();
+
+						return attemptDownload(requestUrl, retryNumber + 1, report);
+					case 422: // UNPROCESSABLE ENTITY
+						report.put(REPORT_PREFIX + urlConn.getResponseCode(), requestUrl);
+						log.warn("waiting and repeating request after 10 sec for URL {}", requestUrl);
+						backoffAndSleep(10000);
+						urlConn.disconnect();
+						logRequestTime(start);
+						try {
+							return getInputStream(urlConn, start);
+						} catch (IOException e) {
+							log
+								.error(
+									"server returned 422 and got IOException accessing the response body from URL {}",
+									requestUrl);
+							log.error("IOException:", e);
+							return attemptDownload(requestUrl, retryNumber + 1, report);
+						}
+					default:
+						log.error("gor error {} from URL: {}", urlConn.getResponseCode(), urlConn.getURL());
+						log.error("response message: {}", urlConn.getResponseMessage());
+						report
+							.put(
+								REPORT_PREFIX + urlConn.getResponseCode(),
+								String
+									.format(
+										"%s Error: %s", requestUrl, urlConn.getResponseMessage()));
+						logRequestTime(start);
+						urlConn.disconnect();
+						throw new CollectorException(urlConn.getResponseCode() + " error " + report);
+				}
+			}
+			throw new CollectorException(
+				String
+					.format(
+						"Unexpected status code: %s errors: %s", urlConn.getResponseCode(),
+						MAPPER.writeValueAsString(report)));
+		} catch (MalformedURLException | UnknownHostException e) {
+			log.error(e.getMessage(), e);
+			report.put(e.getClass().getName(), e.getMessage());
+			throw new CollectorException(e.getMessage(), e);
+		} catch (SocketTimeoutException | SocketException e) {
+			log.error(e.getMessage(), e);
+			report.put(e.getClass().getName(), e.getMessage());
+			backoffAndSleep(getClientParams().getRetryDelay() * retryNumber * 1000);
+			return attemptDownload(requestUrl, retryNumber + 1, report);
+		}
+	}
+
+	private InputStream getInputStream(HttpURLConnection urlConn, long start) throws IOException {
+		InputStream input = urlConn.getInputStream();
+		responseType = urlConn.getContentType();
+		logRequestTime(start);
+		return input;
+	}
+
+	private static void logRequestTime(long start) {
+		log
+			.info(
+				"request time elapsed: {}sec",
+				TimeUnit.MILLISECONDS.toSeconds(System.currentTimeMillis() - start));
+	}
+
+	private void logHeaderFields(final HttpURLConnection urlConn) throws IOException {
+		log.info("Response: {} - {}", urlConn.getResponseCode(), urlConn.getResponseMessage());
+
+		for (Map.Entry<String, List<String>> e : urlConn.getHeaderFields().entrySet()) {
+			if (e.getKey() != null) {
+				for (String v : e.getValue()) {
+					log.info("  key: {} - value: {}", e.getKey(), v);
+				}
+			}
+		}
+	}
+
+	private void backoffAndSleep(int sleepTimeMs) throws CollectorException {
+		log.info("I'm going to sleep for {}ms", sleepTimeMs);
+		try {
+			Thread.sleep(sleepTimeMs);
+		} catch (InterruptedException e) {
+			log.error(e.getMessage(), e);
+			throw new CollectorException(e);
+		}
+	}
+
+	private int obtainRetryAfter(final Map<String, List<String>> headerMap) {
+		for (String key : headerMap.keySet()) {
+			if ((key != null) && key.equalsIgnoreCase(HttpHeaders.RETRY_AFTER) && (!headerMap.get(key).isEmpty())
+				&& NumberUtils.isCreatable(headerMap.get(key).get(0))) {
+				return Integer.parseInt(headerMap.get(key).get(0));
+			}
+		}
+		return -1;
+	}
+
+	private String obtainNewLocation(final Map<String, List<String>> headerMap) throws CollectorException {
+		for (String key : headerMap.keySet()) {
+			if ((key != null) && key.equalsIgnoreCase(HttpHeaders.LOCATION) && (headerMap.get(key).size() > 0)) {
+				return headerMap.get(key).get(0);
+			}
+		}
+		throw new CollectorException("The requested url has been MOVED, but 'location' param is MISSING");
+	}
+
+	private boolean is2xx(final int statusCode) {
+		return statusCode >= 200 && statusCode <= 299;
+	}
+
+	private boolean is4xx(final int statusCode) {
+		return statusCode >= 400 && statusCode <= 499;
+	}
+
+	private boolean is3xx(final int statusCode) {
+		return statusCode >= 300 && statusCode <= 399;
+	}
+
+	private boolean is5xx(final int statusCode) {
+		return statusCode >= 500 && statusCode <= 599;
+	}
+
+	public String getResponseType() {
+		return responseType;
+	}
+
+	public HttpClientParams getClientParams() {
+		return clientParams;
+	}
+
+	public void setClientParams(HttpClientParams clientParams) {
+		this.clientParams = clientParams;
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/common/rest/DNetRestClient.java

@@ -1,11 +1,11 @@
 
 package eu.dnetlib.dhp.common.rest;
 
+import java.io.IOException;
 import java.util.Arrays;
 import java.util.stream.Collectors;
 
 import org.apache.commons.io.IOUtils;
-import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.methods.HttpUriRequest;
@@ -23,17 +23,20 @@ public class DNetRestClient {
 
 	private static final ObjectMapper mapper = new ObjectMapper();
 
+	private DNetRestClient() {
+	}
+
 	public static <T> T doGET(final String url, Class<T> clazz) throws Exception {
 		final HttpGet httpGet = new HttpGet(url);
 		return doHTTPRequest(httpGet, clazz);
 	}
 
-	public static String doGET(final String url) throws Exception {
+	public static String doGET(final String url) throws IOException {
 		final HttpGet httpGet = new HttpGet(url);
 		return doHTTPRequest(httpGet);
 	}
 
-	public static <V> String doPOST(final String url, V objParam) throws Exception {
+	public static <V> String doPOST(final String url, V objParam) throws IOException {
 		final HttpPost httpPost = new HttpPost(url);
 
 		if (objParam != null) {
@@ -45,12 +48,12 @@ public class DNetRestClient {
 		return doHTTPRequest(httpPost);
 	}
 
-	public static <T, V> T doPOST(final String url, V objParam, Class<T> clazz) throws Exception {
+	public static <T, V> T doPOST(final String url, V objParam, Class<T> clazz) throws IOException {
 		return mapper.readValue(doPOST(url, objParam), clazz);
 	}
 
-	private static String doHTTPRequest(final HttpUriRequest r) throws Exception {
-		CloseableHttpClient client = HttpClients.createDefault();
+	private static String doHTTPRequest(final HttpUriRequest r) throws IOException {
+		try (CloseableHttpClient client = HttpClients.createDefault()) {
 
 			log.info("performing HTTP request, method {} on URI {}", r.getMethod(), r.getURI().toString());
 			log
@@ -62,8 +65,8 @@ public class DNetRestClient {
 						.map(h -> h.getName() + ":" + h.getValue())
 						.collect(Collectors.joining(",")));
 
-		CloseableHttpResponse response = client.execute(r);
-		return IOUtils.toString(response.getEntity().getContent());
+			return IOUtils.toString(client.execute(r).getEntity().getContent());
+		}
 	}
 
 	private static <T> T doHTTPRequest(final HttpUriRequest r, Class<T> clazz) throws Exception {

dhp-common/src/main/java/eu/dnetlib/dhp/common/vocabulary/Vocabulary.java

@@ -4,6 +4,7 @@ package eu.dnetlib.dhp.common.vocabulary;
 import java.io.Serializable;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Optional;
 
 import org.apache.commons.lang3.StringUtils;
@@ -46,7 +47,7 @@ public class Vocabulary implements Serializable {
 	}
 
 	public VocabularyTerm getTerm(final String id) {
-		return Optional.ofNullable(id).map(s -> s.toLowerCase()).map(s -> terms.get(s)).orElse(null);
+		return Optional.ofNullable(id).map(String::toLowerCase).map(terms::get).orElse(null);
 	}
 
 	protected void addTerm(final String id, final String name) {
@@ -62,26 +63,46 @@ public class Vocabulary implements Serializable {
 	}
 
 	public VocabularyTerm getTermBySynonym(final String syn) {
-		return getTerm(synonyms.get(syn.toLowerCase()));
+		return Optional
+			.ofNullable(syn)
+			.map(s -> getTerm(synonyms.get(s.toLowerCase())))
+			.orElse(null);
 	}
 
 	public Qualifier getTermAsQualifier(final String termId) {
-		if (StringUtils.isBlank(termId)) {
+		return getTermAsQualifier(termId, false);
+	}
+
+	public Qualifier getTermAsQualifier(final String termId, boolean strict) {
+		final VocabularyTerm term = getTerm(termId);
+		if (Objects.nonNull(term)) {
+			return OafMapperUtils.qualifier(term.getId(), term.getName(), getId(), getName());
+		} else if (Objects.isNull(term) && strict) {
 			return OafMapperUtils.unknown(getId(), getName());
-		} else if (termExists(termId)) {
-			final VocabularyTerm t = getTerm(termId);
-			return OafMapperUtils.qualifier(t.getId(), t.getName(), getId(), getName());
 		} else {
 			return OafMapperUtils.qualifier(termId, termId, getId(), getName());
 		}
 	}
 
 	public Qualifier getSynonymAsQualifier(final String syn) {
+		return getSynonymAsQualifier(syn, false);
+	}
+
+	public Qualifier getSynonymAsQualifier(final String syn, boolean strict) {
 		return Optional
 			.ofNullable(getTermBySynonym(syn))
-			.map(term -> getTermAsQualifier(term.getId()))
+			.map(term -> getTermAsQualifier(term.getId(), strict))
 			.orElse(null);
-		// .orElse(OafMapperUtils.unknown(getId(), getName()));
+	}
+
+	public Qualifier lookup(String id) {
+		return lookup(id, false);
+	}
+
+	public Qualifier lookup(String id, boolean strict) {
+		return Optional
+			.ofNullable(getSynonymAsQualifier(id, strict))
+			.orElse(getTermAsQualifier(id, strict));
 	}
 
 }

dhp-common/src/main/java/eu/dnetlib/dhp/common/vocabulary/VocabularyGroup.java

@@ -46,7 +46,6 @@ public class VocabularyGroup implements Serializable {
 				}
 
 				vocs.addTerm(vocId, termId, termName);
-				// vocs.addSynonyms(vocId, termId, termId);
 			}
 		}
 
@@ -58,10 +57,17 @@ public class VocabularyGroup implements Serializable {
 				final String syn = arr[2].trim();
 
 				vocs.addSynonyms(vocId, termId, syn);
-				// vocs.addSynonyms(vocId, termId, termId);
+
 			}
 		}
 
+		// add the term names as synonyms
+		vocs.vocs.values().forEach(voc -> {
+			voc.getTerms().values().forEach(term -> {
+				voc.addSynonym(term.getName().toLowerCase(), term.getId());
+			});
+		});
+
 		return vocs;
 	}
 
@@ -75,6 +81,13 @@ public class VocabularyGroup implements Serializable {
 		vocs.put(id.toLowerCase(), new Vocabulary(id, name));
 	}
 
+	public Optional<Vocabulary> find(final String vocId) {
+		return Optional
+			.ofNullable(vocId)
+			.map(String::toLowerCase)
+			.map(vocs::get);
+	}
+
 	public void addTerm(final String vocId, final String id, final String name) {
 		if (vocabularyExists(vocId)) {
 			vocs.get(vocId.toLowerCase()).addTerm(id, name);
@@ -98,7 +111,7 @@ public class VocabularyGroup implements Serializable {
 			.getTerms()
 			.values()
 			.stream()
-			.map(t -> t.getId())
+			.map(VocabularyTerm::getId)
 			.collect(Collectors.toCollection(HashSet::new));
 	}
 
@@ -122,6 +135,24 @@ public class VocabularyGroup implements Serializable {
 		return vocs.get(vocId.toLowerCase()).getSynonymAsQualifier(syn);
 	}
 
+	public Qualifier lookupTermBySynonym(final String vocId, final String syn) {
+		return find(vocId)
+			.map(
+				vocabulary -> Optional
+					.ofNullable(vocabulary.getTerm(syn))
+					.map(
+						term -> OafMapperUtils
+							.qualifier(term.getId(), term.getName(), vocabulary.getId(), vocabulary.getName()))
+					.orElse(
+						Optional
+							.ofNullable(vocabulary.getTermBySynonym(syn))
+							.map(
+								term -> OafMapperUtils
+									.qualifier(term.getId(), term.getName(), vocabulary.getId(), vocabulary.getName()))
+							.orElse(null)))
+			.orElse(null);
+	}
+
 	/**
 	 * getSynonymAsQualifierCaseSensitive
 	 *
@@ -154,16 +185,19 @@ public class VocabularyGroup implements Serializable {
 		return Optional
 			.ofNullable(vocId)
 			.map(String::toLowerCase)
-			.map(id -> vocs.containsKey(id))
+			.map(vocs::containsKey)
 			.orElse(false);
 	}
 
 	private void addSynonyms(final String vocId, final String termId, final String syn) {
 		String id = Optional
 			.ofNullable(vocId)
-			.map(s -> s.toLowerCase())
+			.map(String::toLowerCase)
 			.orElseThrow(
-				() -> new IllegalArgumentException(String.format("empty vocabulary id for [term:%s, synonym:%s]")));
+				() -> new IllegalArgumentException(
+					String
+						.format(
+							"empty vocabulary id for [term:%s, synonym:%s]", termId, syn)));
 		Optional
 			.ofNullable(vocs.get(id))
 			.orElseThrow(() -> new IllegalArgumentException("missing vocabulary id: " + vocId))

dhp-common/src/main/java/eu/dnetlib/dhp/message/Message.java

@@ -2,7 +2,6 @@
 package eu.dnetlib.dhp.message;
 
 import java.io.Serializable;
-import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -10,8 +9,8 @@ public class Message implements Serializable {
 
 	private static final long serialVersionUID = 401753881204524893L;
 
-	public static String CURRENT_PARAM = "current";
-	public static String TOTAL_PARAM = "total";
+	public static final String CURRENT_PARAM = "current";
+	public static final String TOTAL_PARAM = "total";
 
 	private MessageType messageType;
 

dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java

@@ -4,13 +4,13 @@ package eu.dnetlib.dhp.oa.merge;
 import java.text.Normalizer;
 import java.util.*;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 import org.apache.commons.lang3.StringUtils;
 
 import com.wcohen.ss.JaroWinkler;
 
 import eu.dnetlib.dhp.schema.oaf.Author;
+import eu.dnetlib.dhp.schema.oaf.Qualifier;
 import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
 import eu.dnetlib.pace.model.Person;
 import scala.Tuple2;
@@ -19,6 +19,9 @@ public class AuthorMerger {
 
 	private static final Double THRESHOLD = 0.95;
 
+	private AuthorMerger() {
+	}
+
 	public static List<Author> merge(List<List<Author>> authors) {
 
 		authors.sort((o1, o2) -> -Integer.compare(countAuthorsPids(o1), countAuthorsPids(o2)));
@@ -36,7 +39,8 @@ public class AuthorMerger {
 	public static List<Author> mergeAuthor(final List<Author> a, final List<Author> b, Double threshold) {
 		int pa = countAuthorsPids(a);
 		int pb = countAuthorsPids(b);
-		List<Author> base, enrich;
+		List<Author> base;
+		List<Author> enrich;
 		int sa = authorsSize(a);
 		int sb = authorsSize(b);
 
@@ -62,22 +66,24 @@ public class AuthorMerger {
 		// <pidComparableString, Author> (if an Author has more than 1 pid, it appears 2 times in the list)
 		final Map<String, Author> basePidAuthorMap = base
 			.stream()
-			.filter(a -> a.getPid() != null && a.getPid().size() > 0)
+			.filter(a -> a.getPid() != null && !a.getPid().isEmpty())
 			.flatMap(
 				a -> a
 					.getPid()
 					.stream()
+					.filter(Objects::nonNull)
 					.map(p -> new Tuple2<>(pidToComparableString(p), a)))
 			.collect(Collectors.toMap(Tuple2::_1, Tuple2::_2, (x1, x2) -> x1));
 
 		// <pid, Author> (list of pid that are missing in the other list)
 		final List<Tuple2<StructuredProperty, Author>> pidToEnrich = enrich
 			.stream()
-			.filter(a -> a.getPid() != null && a.getPid().size() > 0)
+			.filter(a -> a.getPid() != null && !a.getPid().isEmpty())
 			.flatMap(
 				a -> a
 					.getPid()
 					.stream()
+					.filter(Objects::nonNull)
 					.filter(p -> !basePidAuthorMap.containsKey(pidToComparableString(p)))
 					.map(p -> new Tuple2<>(p, a)))
 			.collect(Collectors.toList());
@@ -114,11 +120,47 @@ public class AuthorMerger {
 				});
 	}
 
+	public static String normalizeFullName(final String fullname) {
+		return nfd(fullname)
+			.toLowerCase()
+			// do not compact the regexes in a single expression, would cause StackOverflowError
+			// in case
+			// of large input strings
+			.replaceAll("(\\W)+", " ")
+			.replaceAll("(\\p{InCombiningDiacriticalMarks})+", " ")
+			.replaceAll("(\\p{Punct})+", " ")
+			.replaceAll("(\\d)+", " ")
+			.replaceAll("(\\n)+", " ")
+
+			.trim();
+	}
+
+	private static String authorFieldToBeCompared(Author author) {
+		if (StringUtils.isNotBlank(author.getSurname())) {
+			return author.getSurname();
+
+		}
+		if (StringUtils.isNotBlank(author.getFullname())) {
+			return author.getFullname();
+		}
+		return null;
+	}
+
 	public static String pidToComparableString(StructuredProperty pid) {
-		return (pid.getQualifier() != null
-			? pid.getQualifier().getClassid() != null ? pid.getQualifier().getClassid().toLowerCase() : ""
-			: "")
-			+ (pid.getValue() != null ? pid.getValue().toLowerCase() : "");
+		final String classId = Optional
+			.ofNullable(pid)
+			.map(
+				p -> Optional
+					.ofNullable(p.getQualifier())
+					.map(Qualifier::getClassid)
+					.map(String::toLowerCase)
+					.orElse(""))
+			.orElse("");
+		return Optional
+			.ofNullable(pid)
+			.map(StructuredProperty::getValue)
+			.map(v -> String.join("|", v, classId))
+			.orElse("");
 	}
 
 	public static int countAuthorsPids(List<Author> authors) {
@@ -150,7 +192,7 @@ public class AuthorMerger {
 	}
 
 	private static boolean hasPid(Author a) {
-		if (a == null || a.getPid() == null || a.getPid().size() == 0)
+		if (a == null || a.getPid() == null || a.getPid().isEmpty())
 			return false;
 		return a.getPid().stream().anyMatch(p -> p != null && StringUtils.isNotBlank(p.getValue()));
 	}
@@ -159,11 +201,14 @@ public class AuthorMerger {
 		if (StringUtils.isNotBlank(author.getSurname())) {
 			return new Person(author.getSurname() + ", " + author.getName(), false);
 		} else {
+			if (StringUtils.isNotBlank(author.getFullname()))
 				return new Person(author.getFullname(), false);
+			else
+				return new Person("", false);
 		}
 	}
 
-	private static String normalize(final String s) {
+	public static String normalize(final String s) {
 		String[] normalized = nfd(s)
 			.toLowerCase()
 			// do not compact the regexes in a single expression, would cause StackOverflowError

dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/GroupEntitiesSparkJob.java

@@ -0,0 +1,194 @@
+
+package eu.dnetlib.dhp.oa.merge;
+
+import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
+import static org.apache.spark.sql.functions.col;
+import static org.apache.spark.sql.functions.when;
+
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ForkJoinPool;
+import java.util.stream.Collectors;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.function.MapFunction;
+import org.apache.spark.api.java.function.MapGroupsFunction;
+import org.apache.spark.sql.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import eu.dnetlib.dhp.application.ArgumentApplicationParser;
+import eu.dnetlib.dhp.common.HdfsSupport;
+import eu.dnetlib.dhp.common.vocabulary.VocabularyGroup;
+import eu.dnetlib.dhp.schema.common.EntityType;
+import eu.dnetlib.dhp.schema.common.ModelSupport;
+import eu.dnetlib.dhp.schema.oaf.OafEntity;
+import eu.dnetlib.dhp.schema.oaf.utils.GraphCleaningFunctions;
+import eu.dnetlib.dhp.schema.oaf.utils.MergeUtils;
+import eu.dnetlib.dhp.utils.ISLookupClientFactory;
+import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
+import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
+import scala.Tuple2;
+
+/**
+ * Groups the graph content by entity identifier to ensure ID uniqueness
+ */
+public class GroupEntitiesSparkJob {
+	private static final Logger log = LoggerFactory.getLogger(GroupEntitiesSparkJob.class);
+
+	private static final Encoder<OafEntity> OAFENTITY_KRYO_ENC = Encoders.kryo(OafEntity.class);
+
+	private ArgumentApplicationParser parser;
+
+	public GroupEntitiesSparkJob(ArgumentApplicationParser parser) {
+		this.parser = parser;
+	}
+
+	public static void main(String[] args) throws Exception {
+
+		String jsonConfiguration = IOUtils
+			.toString(
+				GroupEntitiesSparkJob.class
+					.getResourceAsStream(
+						"/eu/dnetlib/dhp/oa/merge/group_graph_entities_parameters.json"));
+		final ArgumentApplicationParser parser = new ArgumentApplicationParser(jsonConfiguration);
+		parser.parseArgument(args);
+
+		Boolean isSparkSessionManaged = Optional
+			.ofNullable(parser.get("isSparkSessionManaged"))
+			.map(Boolean::valueOf)
+			.orElse(Boolean.TRUE);
+		log.info("isSparkSessionManaged: {}", isSparkSessionManaged);
+
+		final String isLookupUrl = parser.get("isLookupUrl");
+		log.info("isLookupUrl: {}", isLookupUrl);
+
+		final ISLookUpService isLookupService = ISLookupClientFactory.getLookUpService(isLookupUrl);
+
+		new GroupEntitiesSparkJob(parser).run(isSparkSessionManaged, isLookupService);
+	}
+
+	public void run(Boolean isSparkSessionManaged, ISLookUpService isLookUpService)
+		throws ISLookUpException {
+
+		String graphInputPath = parser.get("graphInputPath");
+		log.info("graphInputPath: {}", graphInputPath);
+
+		String checkpointPath = parser.get("checkpointPath");
+		log.info("checkpointPath: {}", checkpointPath);
+
+		String outputPath = parser.get("outputPath");
+		log.info("outputPath: {}", outputPath);
+
+		boolean filterInvisible = Boolean.parseBoolean(parser.get("filterInvisible"));
+		log.info("filterInvisible: {}", filterInvisible);
+
+		SparkConf conf = new SparkConf();
+		conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");
+		conf.registerKryoClasses(ModelSupport.getOafModelClasses());
+
+		final VocabularyGroup vocs = VocabularyGroup.loadVocsFromIS(isLookUpService);
+
+		runWithSparkSession(
+			conf,
+			isSparkSessionManaged,
+			spark -> {
+				HdfsSupport.remove(checkpointPath, spark.sparkContext().hadoopConfiguration());
+				groupEntities(spark, graphInputPath, checkpointPath, outputPath, filterInvisible, vocs);
+			});
+	}
+
+	private static void groupEntities(
+		SparkSession spark,
+		String inputPath,
+		String checkpointPath,
+		String outputPath,
+		boolean filterInvisible, VocabularyGroup vocs) {
+
+		Dataset<OafEntity> allEntities = spark.emptyDataset(OAFENTITY_KRYO_ENC);
+
+		for (Map.Entry<EntityType, Class> e : ModelSupport.entityTypes.entrySet()) {
+			String entity = e.getKey().name();
+			Class<? extends OafEntity> entityClass = e.getValue();
+			String entityInputPath = inputPath + "/" + entity;
+
+			if (!HdfsSupport.exists(entityInputPath, spark.sparkContext().hadoopConfiguration())) {
+				continue;
+			}
+
+			allEntities = allEntities
+				.union(
+					((Dataset<OafEntity>) spark
+						.read()
+						.schema(Encoders.bean(entityClass).schema())
+						.json(entityInputPath)
+						.filter("length(id) > 0")
+						.as(Encoders.bean(entityClass)))
+							.map((MapFunction<OafEntity, OafEntity>) r -> r, OAFENTITY_KRYO_ENC));
+		}
+
+		Dataset<?> groupedEntities = allEntities
+			.map(
+				(MapFunction<OafEntity, OafEntity>) entity -> GraphCleaningFunctions
+					.applyCoarVocabularies(entity, vocs),
+				OAFENTITY_KRYO_ENC)
+			.groupByKey((MapFunction<OafEntity, String>) OafEntity::getId, Encoders.STRING())
+			.mapGroups((MapGroupsFunction<String, OafEntity, OafEntity>) MergeUtils::mergeById, OAFENTITY_KRYO_ENC)
+			.map(
+				(MapFunction<OafEntity, Tuple2<String, OafEntity>>) t -> new Tuple2<>(
+					t.getClass().getName(), t),
+				Encoders.tuple(Encoders.STRING(), OAFENTITY_KRYO_ENC));
+
+		// pivot on "_1" (classname of the entity)
+		// created columns containing only entities of the same class
+		for (Map.Entry<EntityType, Class> e : ModelSupport.entityTypes.entrySet()) {
+			String entity = e.getKey().name();
+			Class<? extends OafEntity> entityClass = e.getValue();
+
+			groupedEntities = groupedEntities
+				.withColumn(
+					entity,
+					when(col("_1").equalTo(entityClass.getName()), col("_2")));
+		}
+
+		groupedEntities
+			.drop("_1", "_2")
+			.write()
+			.mode(SaveMode.Overwrite)
+			.option("compression", "gzip")
+			.save(checkpointPath);
+
+		ForkJoinPool parPool = new ForkJoinPool(ModelSupport.entityTypes.size());
+
+		ModelSupport.entityTypes
+			.entrySet()
+			.stream()
+			.map(e -> parPool.submit(() -> {
+				String entity = e.getKey().name();
+				Class<? extends OafEntity> entityClass = e.getValue();
+
+				spark
+					.read()
+					.load(checkpointPath)
+					.select(col(entity).as("value"))
+					.filter("value IS NOT NULL")
+					.as(OAFENTITY_KRYO_ENC)
+					.map((MapFunction<OafEntity, OafEntity>) r -> r, (Encoder<OafEntity>) Encoders.bean(entityClass))
+					.filter(filterInvisible ? "dataInfo.invisible != TRUE" : "TRUE")
+					.write()
+					.mode(SaveMode.Overwrite)
+					.option("compression", "gzip")
+					.json(outputPath + "/" + entity);
+			}))
+			.collect(Collectors.toList())
+			.forEach(t -> {
+				try {
+					t.get();
+				} catch (InterruptedException | ExecutionException e) {
+					throw new RuntimeException(e);
+				}
+			});
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/oozie/RunSQLSparkJob.java

@@ -0,0 +1,83 @@
+
+package eu.dnetlib.dhp.oozie;
+
+import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkHiveSession;
+
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+import org.apache.commons.lang3.time.DurationFormatUtils;
+import org.apache.commons.text.StringSubstitutor;
+import org.apache.spark.SparkConf;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.io.Resources;
+
+import eu.dnetlib.dhp.application.ArgumentApplicationParser;
+
+public class RunSQLSparkJob {
+	private static final Logger log = LoggerFactory.getLogger(RunSQLSparkJob.class);
+
+	private final ArgumentApplicationParser parser;
+
+	public RunSQLSparkJob(ArgumentApplicationParser parser) {
+		this.parser = parser;
+	}
+
+	public static void main(String[] args) throws Exception {
+
+		Map<String, String> params = new HashMap<>();
+		for (int i = 0; i < args.length - 1; i++) {
+			if (args[i].startsWith("--")) {
+				params.put(args[i].substring(2), args[++i]);
+			}
+		}
+
+		/*
+		 * String jsonConfiguration = IOUtils .toString( Objects .requireNonNull( RunSQLSparkJob.class
+		 * .getResourceAsStream( "/eu/dnetlib/dhp/oozie/run_sql_parameters.json"))); final ArgumentApplicationParser
+		 * parser = new ArgumentApplicationParser(jsonConfiguration); parser.parseArgument(args);
+		 */
+
+		Boolean isSparkSessionManaged = Optional
+			.ofNullable(params.get("isSparkSessionManaged"))
+			.map(Boolean::valueOf)
+			.orElse(Boolean.TRUE);
+		log.info("isSparkSessionManaged: {}", isSparkSessionManaged);
+
+		URL url = com.google.common.io.Resources.getResource(params.get("sql"));
+		String raw_sql = Resources.toString(url, StandardCharsets.UTF_8);
+
+		String sql = StringSubstitutor.replace(raw_sql, params);
+		log.info("sql: {}", sql);
+
+		SparkConf conf = new SparkConf();
+		conf.set("hive.metastore.uris", params.get("hiveMetastoreUris"));
+
+		runWithSparkHiveSession(
+			conf,
+			isSparkSessionManaged,
+			spark -> {
+				for (String statement : sql.split(";\\s*/\\*\\s*EOS\\s*\\*/\\s*")) {
+					log.info("executing: {}", statement);
+					long startTime = System.currentTimeMillis();
+					try {
+						spark.sql(statement).show();
+					} catch (Exception e) {
+						log.error("Error executing statement: {}", statement, e);
+						System.err.println("Error executing statement: " + statement + "\n" + e);
+						throw e;
+					}
+					log
+						.info(
+							"executed in {}",
+							DurationFormatUtils.formatDuration(System.currentTimeMillis() - startTime, "HH:mm:ss.S"));
+				}
+			});
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/parser/utility/VtdUtilityParser.java

@@ -12,6 +12,9 @@ import com.ximpleware.VTDNav;
 /** Created by sandro on 9/29/16. */
 public class VtdUtilityParser {
 
+	private VtdUtilityParser() {
+	}
+
 	public static List<Node> getTextValuesWithAttributes(
 		final AutoPilot ap, final VTDNav vn, final String xpath, final List<String> attributes)
 		throws VtdException {

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/CleaningFunctions.java

@@ -0,0 +1,76 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+
+import org.apache.commons.lang3.StringUtils;
+
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+
+public class CleaningFunctions {
+
+	public static final String DOI_PREFIX_REGEX = "(^10\\.|\\/10\\.)";
+	public static final String DOI_PREFIX = "10.";
+
+	public static final Set<String> PID_BLACKLIST = new HashSet<>();
+
+	static {
+		PID_BLACKLIST.add("none");
+		PID_BLACKLIST.add("na");
+	}
+
+	public CleaningFunctions() {
+	}
+
+	/**
+	 * Utility method that filter PID values on a per-type basis.
+	 * @param s the PID whose value will be checked.
+	 * @return false if the pid matches the filter criteria, true otherwise.
+	 */
+	public static boolean pidFilter(StructuredProperty s) {
+		final String pidValue = s.getValue();
+		if (Objects.isNull(s.getQualifier()) ||
+			StringUtils.isBlank(pidValue) ||
+			StringUtils.isBlank(pidValue.replaceAll("(?:\\n|\\r|\\t|\\s)", ""))) {
+			return false;
+		}
+		if (CleaningFunctions.PID_BLACKLIST.contains(pidValue)) {
+			return false;
+		}
+		return !PidBlacklistProvider.getBlacklist(s.getQualifier().getClassid()).contains(pidValue);
+	}
+
+	/**
+	 * Utility method that normalises PID values on a per-type basis.
+	 * @param pid the PID whose value will be normalised.
+	 * @return the PID containing the normalised value.
+	 */
+	public static StructuredProperty normalizePidValue(StructuredProperty pid) {
+		pid
+			.setValue(
+				normalizePidValue(
+					pid.getQualifier().getClassid(),
+					pid.getValue()));
+
+		return pid;
+	}
+
+	public static String normalizePidValue(String pidType, String pidValue) {
+		String value = Optional
+			.ofNullable(pidValue)
+			.map(String::trim)
+			.orElseThrow(() -> new IllegalArgumentException("PID value cannot be empty"));
+
+		switch (pidType) {
+
+			// TODO add cleaning for more PID types as needed
+			case "doi":
+				return value.toLowerCase().replaceFirst(DOI_PREFIX_REGEX, DOI_PREFIX);
+		}
+		return value;
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/DoiCleaningRule.java

@@ -0,0 +1,38 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import org.apache.commons.lang3.StringUtils;
+
+public class DoiCleaningRule {
+
+	public static String clean(final String doi) {
+		return doi
+			.toLowerCase()
+			.replaceAll("\\s", "")
+			.replaceAll("^doi:", "")
+			.replaceFirst(CleaningFunctions.DOI_PREFIX_REGEX, CleaningFunctions.DOI_PREFIX);
+	}
+
+	public static String normalizeDoi(final String input) {
+		if (input == null)
+			return null;
+		final String replaced = input
+			.replaceAll("\\n|\\r|\\t|\\s", "")
+			.toLowerCase()
+			.replaceFirst(CleaningFunctions.DOI_PREFIX_REGEX, CleaningFunctions.DOI_PREFIX);
+		if (StringUtils.isEmpty(replaced))
+			return null;
+
+		if (!replaced.contains("10."))
+			return null;
+
+		final String ret = replaced.substring(replaced.indexOf("10."));
+
+		if (!ret.startsWith(CleaningFunctions.DOI_PREFIX))
+			return null;
+
+		return ret;
+
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/FundRefCleaningRule.java

@@ -0,0 +1,25 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class FundRefCleaningRule {
+
+	public static final Pattern PATTERN = Pattern.compile("\\d+");
+
+	public static String clean(final String fundRefId) {
+
+		String s = fundRefId
+			.toLowerCase()
+			.replaceAll("\\s", "");
+
+		Matcher m = PATTERN.matcher(s);
+		if (m.find()) {
+			return m.group();
+		} else {
+			return "";
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/GraphCleaningFunctions.java

@@ -1,52 +1,245 @@
 
 package eu.dnetlib.dhp.schema.oaf.utils;
 
+import static eu.dnetlib.dhp.schema.common.ModelConstants.*;
+import static eu.dnetlib.dhp.schema.common.ModelConstants.OPENAIRE_META_RESOURCE_TYPE;
+import static eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils.getProvenance;
+
+import java.net.MalformedURLException;
+import java.net.URL;
 import java.time.LocalDate;
 import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
 import java.util.*;
 import java.util.function.Function;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.apache.commons.lang3.StringUtils;
-import org.jetbrains.annotations.NotNull;
 
 import com.github.sisyphsu.dateparser.DateParserUtils;
 import com.google.common.collect.Lists;
-import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
 
+import eu.dnetlib.dhp.common.vocabulary.VocabularyGroup;
+import eu.dnetlib.dhp.common.vocabulary.VocabularyTerm;
 import eu.dnetlib.dhp.schema.common.ModelConstants;
 import eu.dnetlib.dhp.schema.common.ModelSupport;
 import eu.dnetlib.dhp.schema.oaf.*;
+import me.xuender.unidecode.Unidecode;
 
 public class GraphCleaningFunctions extends CleaningFunctions {
 
+	public static final String DNET_PUBLISHERS = "dnet:publishers";
+
+	public static final String DNET_LICENSES = "dnet:licenses";
+
 	public static final String ORCID_CLEANING_REGEX = ".*([0-9]{4}).*[-–—−=].*([0-9]{4}).*[-–—−=].*([0-9]{4}).*[-–—−=].*([0-9x]{4})";
 	public static final int ORCID_LEN = 19;
 	public static final String CLEANING_REGEX = "(?:\\n|\\r|\\t)";
 	public static final String INVALID_AUTHOR_REGEX = ".*deactivated.*";
-	public static final String TITLE_FILTER_REGEX = "[.*test.*\\W\\d]";
-	public static final int TITLE_FILTER_RESIDUAL_LENGTH = 10;
+
+	public static final String TITLE_TEST = "test";
+	public static final String TITLE_FILTER_REGEX = String.format("(%s)|\\W|\\d", TITLE_TEST);
+
+	public static final int TITLE_FILTER_RESIDUAL_LENGTH = 5;
+	private static final String NAME_CLEANING_REGEX = "[\\r\\n\\t\\s]+";
+
+	private static final Set<String> INVALID_AUTHOR_NAMES = new HashSet<>();
+
+	private static final Set<String> INVALID_URLS = new HashSet<>();
+
+	private static final Set<String> INVALID_URL_HOSTS = new HashSet<>();
+
+	private static final HashSet<String> PEER_REVIEWED_TYPES = new HashSet<>();
+
+	static {
+		PEER_REVIEWED_TYPES.add("Article");
+		PEER_REVIEWED_TYPES.add("Part of book or chapter of book");
+		PEER_REVIEWED_TYPES.add("Book");
+		PEER_REVIEWED_TYPES.add("Doctoral thesis");
+		PEER_REVIEWED_TYPES.add("Master thesis");
+		PEER_REVIEWED_TYPES.add("Data Paper");
+		PEER_REVIEWED_TYPES.add("Thesis");
+		PEER_REVIEWED_TYPES.add("Bachelor thesis");
+		PEER_REVIEWED_TYPES.add("Conference object");
+
+		INVALID_AUTHOR_NAMES.add("(:null)");
+		INVALID_AUTHOR_NAMES.add("(:unap)");
+		INVALID_AUTHOR_NAMES.add("(:tba)");
+		INVALID_AUTHOR_NAMES.add("(:unas)");
+		INVALID_AUTHOR_NAMES.add("(:unav)");
+		INVALID_AUTHOR_NAMES.add("(:unkn)");
+		INVALID_AUTHOR_NAMES.add("(:unkn) unknown");
+		INVALID_AUTHOR_NAMES.add(":none");
+		INVALID_AUTHOR_NAMES.add(":null");
+		INVALID_AUTHOR_NAMES.add(":unas");
+		INVALID_AUTHOR_NAMES.add(":unav");
+		INVALID_AUTHOR_NAMES.add(":unkn");
+		INVALID_AUTHOR_NAMES.add("[autor desconocido]");
+		INVALID_AUTHOR_NAMES.add("[s. n.]");
+		INVALID_AUTHOR_NAMES.add("[s.n]");
+		INVALID_AUTHOR_NAMES.add("[unknown]");
+		INVALID_AUTHOR_NAMES.add("anonymous");
+		INVALID_AUTHOR_NAMES.add("n.n.");
+		INVALID_AUTHOR_NAMES.add("nn");
+		INVALID_AUTHOR_NAMES.add("no name supplied");
+		INVALID_AUTHOR_NAMES.add("none");
+		INVALID_AUTHOR_NAMES.add("none available");
+		INVALID_AUTHOR_NAMES.add("not available not available");
+		INVALID_AUTHOR_NAMES.add("null &na;");
+		INVALID_AUTHOR_NAMES.add("null anonymous");
+		INVALID_AUTHOR_NAMES.add("unbekannt");
+		INVALID_AUTHOR_NAMES.add("unknown");
+		INVALID_AUTHOR_NAMES.add("autor, Sin");
+		INVALID_AUTHOR_NAMES.add("Desconocido / Inconnu,");
+
+		INVALID_URL_HOSTS.add("creativecommons.org");
+		INVALID_URL_HOSTS.add("www.academia.edu");
+		INVALID_URL_HOSTS.add("academia.edu");
+		INVALID_URL_HOSTS.add("researchgate.net");
+		INVALID_URL_HOSTS.add("www.researchgate.net");
+
+		INVALID_URLS.add("http://repo.scoap3.org/api");
+		INVALID_URLS.add("http://ora.ox.ac.uk/objects/uuid:");
+		INVALID_URLS.add("http://ntur.lib.ntu.edu.tw/news/agent_contract.pdf");
+		INVALID_URLS.add("https://media.springer.com/full/springer-instructions-for-authors-assets/pdf/SN_BPF_EN.pdf");
+		INVALID_URLS.add("http://www.tobaccoinduceddiseases.org/dl/61aad426c96519bea4040a374c6a6110/");
+		INVALID_URLS.add("https://www.bilboard.nl/verenigingsbladen/bestuurskundige-berichten");
+	}
+
+	public static <T extends Oaf> T cleanContext(T value, String contextId, String verifyParam) {
+		if (ModelSupport.isSubClass(value, Result.class)) {
+			final Result res = (Result) value;
+			if (shouldCleanContext(res, verifyParam)) {
+				res
+					.setContext(
+						res
+							.getContext()
+							.stream()
+							.filter(c -> !StringUtils.startsWith(c.getId().toLowerCase(), contextId))
+							.collect(Collectors.toList()));
+			}
+			return (T) res;
+		} else {
+			return value;
+		}
+	}
+
+	private static boolean shouldCleanContext(Result res, String verifyParam) {
+		boolean titleMatch = res
+			.getTitle()
+			.stream()
+			.filter(
+				t -> t
+					.getQualifier()
+					.getClassid()
+					.equalsIgnoreCase(ModelConstants.MAIN_TITLE_QUALIFIER.getClassid()))
+			.anyMatch(t -> t.getValue().toLowerCase().startsWith(verifyParam.toLowerCase()));
+
+		return titleMatch && Objects.nonNull(res.getContext());
+	}
+
+	public static <T extends Oaf> T cleanCountry(T value, String[] verifyParam, Set<String> hostedBy,
+		String collectedfrom, String country) {
+		if (ModelSupport.isSubClass(value, Result.class)) {
+			final Result res = (Result) value;
+			if (res.getInstance().stream().anyMatch(i -> hostedBy.contains(i.getHostedby().getKey())) ||
+				!res.getCollectedfrom().stream().anyMatch(cf -> cf.getValue().equals(collectedfrom))) {
+				return (T) res;
+			}
+
+			List<StructuredProperty> ids = getPidsAndAltIds(res).collect(Collectors.toList());
+			if (ids
+				.stream()
+				.anyMatch(
+					p -> p
+						.getQualifier()
+						.getClassid()
+						.equals(PidType.doi.toString()) && pidInParam(p.getValue(), verifyParam))) {
+				res
+					.setCountry(
+						res
+							.getCountry()
+							.stream()
+							.filter(
+								c -> toTakeCountry(c, country))
+							.collect(Collectors.toList()));
+			}
+
+			return (T) res;
+		} else {
+			return value;
+		}
+	}
+
+	private static <T extends Result> Stream<StructuredProperty> getPidsAndAltIds(T r) {
+		final Stream<StructuredProperty> resultPids = Optional
+			.ofNullable(r.getPid())
+			.map(Collection::stream)
+			.orElse(Stream.empty());
+
+		final Stream<StructuredProperty> instancePids = Optional
+			.ofNullable(r.getInstance())
+			.map(
+				instance -> instance
+					.stream()
+					.flatMap(
+						i -> Optional
+							.ofNullable(i.getPid())
+							.map(Collection::stream)
+							.orElse(Stream.empty())))
+			.orElse(Stream.empty());
+
+		final Stream<StructuredProperty> instanceAltIds = Optional
+			.ofNullable(r.getInstance())
+			.map(
+				instance -> instance
+					.stream()
+					.flatMap(
+						i -> Optional
+							.ofNullable(i.getAlternateIdentifier())
+							.map(Collection::stream)
+							.orElse(Stream.empty())))
+			.orElse(Stream.empty());
+
+		return Stream
+			.concat(
+				Stream.concat(resultPids, instancePids),
+				instanceAltIds);
+	}
+
+	private static boolean pidInParam(String value, String[] verifyParam) {
+		for (String s : verifyParam)
+			if (value.startsWith(s))
+				return true;
+		return false;
+	}
+
+	private static boolean toTakeCountry(Country c, String country) {
+		// If dataInfo is not set, or dataInfo.inferenceprovenance is not set or not present then it cannot be
+		// inserted via propagation
+		if (!Optional.ofNullable(c.getDataInfo()).isPresent())
+			return true;
+		if (!Optional.ofNullable(c.getDataInfo().getInferenceprovenance()).isPresent())
+			return true;
+		return !(c
+			.getClassid()
+			.equalsIgnoreCase(country) &&
+			c.getDataInfo().getInferenceprovenance().equals("propagation"));
+	}
 
 	public static <T extends Oaf> T fixVocabularyNames(T value) {
-		if (value instanceof Datasource) {
-			// nothing to clean here
-		} else if (value instanceof Project) {
-			// nothing to clean here
-		} else if (value instanceof Organization) {
-			Organization o = (Organization) value;
-			if (Objects.nonNull(o.getCountry())) {
-				fixVocabName(o.getCountry(), ModelConstants.DNET_COUNTRY_TYPE);
-			}
-		} else if (value instanceof Relation) {
-			// nothing to clean here
-		} else if (value instanceof Result) {
+		if (value instanceof OafEntity) {
 
+			OafEntity e = (OafEntity) value;
+
+			Optional
+				.ofNullable(e.getPid())
+				.ifPresent(pid -> pid.forEach(p -> fixVocabName(p.getQualifier(), ModelConstants.DNET_PID_TYPES)));
+
+			if (value instanceof Result) {
 				Result r = (Result) value;
 
 				fixVocabName(r.getLanguage(), ModelConstants.DNET_LANGUAGES);
@@ -60,6 +253,11 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 					for (Instance i : r.getInstance()) {
 						fixVocabName(i.getAccessright(), ModelConstants.DNET_ACCESS_MODES);
 						fixVocabName(i.getRefereed(), ModelConstants.DNET_REVIEW_LEVELS);
+						Optional
+							.ofNullable(i.getPid())
+							.ifPresent(
+								pid -> pid.forEach(p -> fixVocabName(p.getQualifier(), ModelConstants.DNET_PID_TYPES)));
+
 					}
 				}
 				if (Objects.nonNull(r.getAuthor())) {
@@ -80,16 +278,47 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 				} else if (value instanceof Software) {
 
 				}
+			} else if (value instanceof Datasource) {
+				// nothing to clean here
+			} else if (value instanceof Project) {
+				// nothing to clean here
+			} else if (value instanceof Organization) {
+				Organization o = (Organization) value;
+				if (Objects.nonNull(o.getCountry())) {
+					fixVocabName(o.getCountry(), ModelConstants.DNET_COUNTRY_TYPE);
+				}
+
+			}
+		} else if (value instanceof Relation) {
+			// nothing to clean here
 		}
 
 		return value;
 	}
 
 	public static <T extends Oaf> boolean filter(T value) {
+		if (!(value instanceof Relation) && (Boolean.TRUE
+			.equals(
+				Optional
+					.ofNullable(value)
+					.map(
+						o -> Optional
+							.ofNullable(o.getDataInfo())
+							.map(
+								d -> Optional
+									.ofNullable(d.getInvisible())
+									.orElse(true))
+							.orElse(false))
+					.orElse(true)))) {
+			return true;
+		}
+
 		if (value instanceof Datasource) {
-			// nothing to evaluate here
+			final Datasource d = (Datasource) value;
+			return Objects.nonNull(d.getOfficialname()) && StringUtils.isNotBlank(d.getOfficialname().getValue());
 		} else if (value instanceof Project) {
-			// nothing to evaluate here
+			final Project p = (Project) value;
+			return Objects.nonNull(p.getCode()) && StringUtils.isNotBlank(p.getCode().getValue());
 		} else if (value instanceof Organization) {
 			// nothing to evaluate here
 		} else if (value instanceof Relation) {
@@ -115,7 +344,21 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 		return true;
 	}
 
-	public static <T extends Oaf> T cleanup(T value) {
+	public static <T extends Oaf> T cleanup(T value, VocabularyGroup vocs) {
+
+		if (Objects.isNull(value.getDataInfo())) {
+			final DataInfo d = new DataInfo();
+			d.setDeletedbyinference(false);
+			value.setDataInfo(d);
+		}
+
+		if (value instanceof OafEntity) {
+
+			OafEntity e = (OafEntity) value;
+			if (Objects.nonNull(e.getPid())) {
+				e.setPid(processPidCleaning(e.getPid()));
+			}
+
 			if (value instanceof Datasource) {
 				// nothing to clean here
 			} else if (value instanceof Project) {
@@ -125,21 +368,20 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 				if (Objects.isNull(o.getCountry()) || StringUtils.isBlank(o.getCountry().getClassid())) {
 					o.setCountry(ModelConstants.UNKNOWN_COUNTRY);
 				}
-		} else if (value instanceof Relation) {
-			Relation r = (Relation) value;
-
-			Optional<String> validationDate = doCleanDate(r.getValidationDate());
-			if (validationDate.isPresent()) {
-				r.setValidationDate(validationDate.get());
-				r.setValidated(true);
-			} else {
-				r.setValidationDate(null);
-				r.setValidated(false);
-			}
 			} else if (value instanceof Result) {
-
 				Result r = (Result) value;
 
+				if (Objects.isNull(r.getContext())) {
+					r.setContext(new ArrayList<>());
+				}
+
+				if (Objects.nonNull(r.getFulltext())
+					&& (ModelConstants.SOFTWARE_RESULTTYPE_CLASSID.equals(r.getResulttype().getClassid()) ||
+						ModelConstants.DATASET_RESULTTYPE_CLASSID.equals(r.getResulttype().getClassid()))) {
+					r.setFulltext(null);
+
+				}
+
 				if (Objects.nonNull(r.getDateofacceptance())) {
 					Optional<String> date = cleanDateField(r.getDateofacceptance());
 					if (date.isPresent()) {
@@ -164,8 +406,26 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 								.filter(sp -> StringUtils.isNotBlank(sp.getValue()))
 								.collect(Collectors.toList()));
 				}
-			if (Objects.nonNull(r.getPublisher()) && StringUtils.isBlank(r.getPublisher().getValue())) {
+				if (Objects.nonNull(r.getPublisher())) {
+					if (StringUtils.isBlank(r.getPublisher().getValue())) {
 						r.setPublisher(null);
+					} else {
+						r
+							.getPublisher()
+							.setValue(
+								r
+									.getPublisher()
+									.getValue()
+									.replaceAll(NAME_CLEANING_REGEX, " "));
+
+						if (vocs.vocabularyExists(DNET_PUBLISHERS)) {
+							vocs
+								.find(DNET_PUBLISHERS)
+								.map(voc -> voc.getTermBySynonym(r.getPublisher().getValue()))
+								.map(VocabularyTerm::getName)
+								.ifPresent(publisher -> r.getPublisher().setValue(publisher));
+						}
+					}
 				}
 				if (Objects.isNull(r.getLanguage()) || StringUtils.isBlank(r.getLanguage().getClassid())) {
 					r
@@ -173,8 +433,8 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 							qualifier("und", "Undetermined", ModelConstants.DNET_LANGUAGES));
 				}
 				if (Objects.nonNull(r.getSubject())) {
-				r
-					.setSubject(
+					List<Subject> subjects = Lists
+						.newArrayList(
 							r
 								.getSubject()
 								.stream()
@@ -182,8 +442,26 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 								.filter(sp -> StringUtils.isNotBlank(sp.getValue()))
 								.filter(sp -> Objects.nonNull(sp.getQualifier()))
 								.filter(sp -> StringUtils.isNotBlank(sp.getQualifier().getClassid()))
+								.map(s -> {
+									if ("dnet:result_subject".equals(s.getQualifier().getClassid())) {
+										s.getQualifier().setClassid(ModelConstants.DNET_SUBJECT_TYPOLOGIES);
+										s.getQualifier().setClassname(ModelConstants.DNET_SUBJECT_TYPOLOGIES);
+									}
+									return s;
+								})
 								.map(GraphCleaningFunctions::cleanValue)
-							.collect(Collectors.toList()));
+								.collect(
+									Collectors
+										.toMap(
+											s -> Optional
+												.ofNullable(s.getQualifier())
+												.map(q -> q.getClassid() + s.getValue())
+												.orElse(s.getValue()),
+											Function.identity(),
+											(s1, s2) -> Collections
+												.min(Lists.newArrayList(s1, s2), new SubjectProvenanceComparator())))
+								.values());
+					r.setSubject(subjects);
 				}
 				if (Objects.nonNull(r.getTitle())) {
 					r
@@ -194,11 +472,30 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 								.filter(Objects::nonNull)
 								.filter(sp -> StringUtils.isNotBlank(sp.getValue()))
 								.filter(
-								sp -> sp
+									sp -> {
+										final String title = sp
 											.getValue()
-									.toLowerCase()
+											.toLowerCase();
+										final String decoded = Unidecode.decode(title);
+
+										if (StringUtils.contains(decoded, TITLE_TEST)) {
+											return decoded
 												.replaceAll(TITLE_FILTER_REGEX, "")
-									.length() > TITLE_FILTER_RESIDUAL_LENGTH)
+												.length() > TITLE_FILTER_RESIDUAL_LENGTH;
+										}
+										return !decoded
+											.replaceAll("\\W|\\d", "")
+											.isEmpty();
+									})
+								.map(GraphCleaningFunctions::cleanValue)
+								.collect(Collectors.toList()));
+				}
+				if (Objects.nonNull(r.getFormat())) {
+					r
+						.setFormat(
+							r
+								.getFormat()
+								.stream()
 								.map(GraphCleaningFunctions::cleanValue)
 								.collect(Collectors.toList()));
 				}
@@ -211,11 +508,10 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 								.filter(Objects::nonNull)
 								.filter(sp -> StringUtils.isNotBlank(sp.getValue()))
 								.map(GraphCleaningFunctions::cleanValue)
+								.sorted((s1, s2) -> s2.getValue().length() - s1.getValue().length())
+								.limit(ModelHardLimits.MAX_ABSTRACTS)
 								.collect(Collectors.toList()));
 				}
-			if (Objects.nonNull(r.getPid())) {
-				r.setPid(processPidCleaning(r.getPid()));
-			}
 				if (Objects.isNull(r.getResourcetype()) || StringUtils.isBlank(r.getResourcetype().getClassid())) {
 					r
 						.setResourcetype(
@@ -224,6 +520,40 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 				if (Objects.nonNull(r.getInstance())) {
 
 					for (Instance i : r.getInstance()) {
+						if (!vocs
+							.termExists(ModelConstants.DNET_PUBLICATION_RESOURCE, i.getInstancetype().getClassid())) {
+							if (r instanceof Publication) {
+								i
+									.setInstancetype(
+										OafMapperUtils
+											.qualifier(
+												"0038", "Other literature type",
+												ModelConstants.DNET_PUBLICATION_RESOURCE,
+												ModelConstants.DNET_PUBLICATION_RESOURCE));
+							} else if (r instanceof Dataset) {
+								i
+									.setInstancetype(
+										OafMapperUtils
+											.qualifier(
+												"0039", "Other dataset type", ModelConstants.DNET_PUBLICATION_RESOURCE,
+												ModelConstants.DNET_PUBLICATION_RESOURCE));
+							} else if (r instanceof Software) {
+								i
+									.setInstancetype(
+										OafMapperUtils
+											.qualifier(
+												"0040", "Other software type", ModelConstants.DNET_PUBLICATION_RESOURCE,
+												ModelConstants.DNET_PUBLICATION_RESOURCE));
+							} else if (r instanceof OtherResearchProduct) {
+								i
+									.setInstancetype(
+										OafMapperUtils
+											.qualifier(
+												"0020", "Other ORP type", ModelConstants.DNET_PUBLICATION_RESOURCE,
+												ModelConstants.DNET_PUBLICATION_RESOURCE));
+							}
+						}
+
 						if (Objects.nonNull(i.getPid())) {
 							i.setPid(processPidCleaning(i.getPid()));
 						}
@@ -242,7 +572,8 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 									});
 							});
 
-					if (Objects.isNull(i.getAccessright()) || StringUtils.isBlank(i.getAccessright().getClassid())) {
+						if (Objects.isNull(i.getAccessright())
+							|| StringUtils.isBlank(i.getAccessright().getClassid())) {
 							i
 								.setAccessright(
 									accessRight(
@@ -252,9 +583,46 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 						if (Objects.isNull(i.getHostedby()) || StringUtils.isBlank(i.getHostedby().getKey())) {
 							i.setHostedby(ModelConstants.UNKNOWN_REPOSITORY);
 						}
-					if (Objects.isNull(i.getRefereed())) {
+						if (Objects.isNull(i.getRefereed()) || StringUtils.isBlank(i.getRefereed().getClassid())) {
 							i.setRefereed(qualifier("0000", "Unknown", ModelConstants.DNET_REVIEW_LEVELS));
 						}
+
+						if (Objects.nonNull(i.getLicense()) && Objects.nonNull(i.getLicense().getValue())) {
+							vocs
+								.find(DNET_LICENSES)
+								.map(voc -> voc.getTermBySynonym(i.getLicense().getValue()))
+								.map(VocabularyTerm::getId)
+								.ifPresent(license -> i.getLicense().setValue(license));
+						}
+
+						// from the script from Dimitris
+						if ("0000".equals(i.getRefereed().getClassid())) {
+							final boolean isFromCrossref = Optional
+								.ofNullable(i.getCollectedfrom())
+								.map(KeyValue::getKey)
+								.map(id -> id.equals(ModelConstants.CROSSREF_ID))
+								.orElse(false);
+							final boolean hasDoi = Optional
+								.ofNullable(i.getPid())
+								.map(
+									pid -> pid
+										.stream()
+										.anyMatch(
+											p -> PidType.doi.toString().equals(p.getQualifier().getClassid())))
+								.orElse(false);
+							final boolean isPeerReviewedType = PEER_REVIEWED_TYPES
+								.contains(i.getInstancetype().getClassname());
+							final boolean noOtherLitType = r
+								.getInstance()
+								.stream()
+								.noneMatch(ii -> "Other literature type".equals(ii.getInstancetype().getClassname()));
+							if (isFromCrossref && hasDoi && isPeerReviewedType && noOtherLitType) {
+								i.setRefereed(qualifier("0001", "peerReviewed", ModelConstants.DNET_REVIEW_LEVELS));
+							} else {
+								i.setRefereed(qualifier("0002", "nonPeerReviewed", ModelConstants.DNET_REVIEW_LEVELS));
+							}
+						}
+
 						if (Objects.nonNull(i.getDateofacceptance())) {
 							Optional<String> date = cleanDateField(i.getDateofacceptance());
 							if (date.isPresent()) {
@@ -263,9 +631,24 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 								i.setDateofacceptance(null);
 							}
 						}
+						if (StringUtils.isNotBlank(i.getFulltext()) &&
+							(ModelConstants.SOFTWARE_RESULTTYPE_CLASSID.equals(r.getResulttype().getClassid()) ||
+								ModelConstants.DATASET_RESULTTYPE_CLASSID.equals(r.getResulttype().getClassid()))) {
+							i.setFulltext(null);
+						}
+						if (Objects.nonNull(i.getUrl())) {
+							i
+								.setUrl(
+									i
+										.getUrl()
+										.stream()
+										.filter(GraphCleaningFunctions::urlFilter)
+										.collect(Collectors.toList()));
 						}
 					}
-			if (Objects.isNull(r.getBestaccessright()) || StringUtils.isBlank(r.getBestaccessright().getClassid())) {
+				}
+				if (Objects.isNull(r.getBestaccessright())
+					|| StringUtils.isBlank(r.getBestaccessright().getClassid())) {
 					Qualifier bestaccessrights = OafMapperUtils.createBestAccessRights(r.getInstance());
 					if (Objects.isNull(bestaccessrights)) {
 						r
@@ -283,9 +666,9 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 							r
 								.getAuthor()
 								.stream()
-							.filter(a -> Objects.nonNull(a))
-							.filter(a -> StringUtils.isNotBlank(a.getFullname()))
-							.filter(a -> StringUtils.isNotBlank(a.getFullname().replaceAll("[\\W]", "")))
+								.filter(Objects::nonNull)
+								.filter(GraphCleaningFunctions::isValidAuthorName)
+								.map(GraphCleaningFunctions::cleanupAuthor)
 								.collect(Collectors.toList()));
 
 					boolean nullRank = r
@@ -311,23 +694,20 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 										.filter(Objects::nonNull)
 										.filter(p -> Objects.nonNull(p.getQualifier()))
 										.filter(p -> StringUtils.isNotBlank(p.getValue()))
+										.filter(
+											p -> StringUtils
+												.contains(StringUtils.lowerCase(p.getQualifier().getClassid()), ORCID))
 										.map(p -> {
 											// hack to distinguish orcid from orcid_pending
-										String pidProvenance = Optional
-											.ofNullable(p.getDataInfo())
-											.map(
-												d -> Optional
-													.ofNullable(d.getProvenanceaction())
-													.map(Qualifier::getClassid)
-													.orElse(""))
-											.orElse("");
+											String pidProvenance = getProvenance(p.getDataInfo());
 											if (p
 												.getQualifier()
 												.getClassid()
 												.toLowerCase()
 												.contains(ModelConstants.ORCID)) {
 												if (pidProvenance
-												.equals(ModelConstants.SYSIMPORT_CROSSWALK_ENTITYREGISTRY)) {
+													.equals(ModelConstants.SYSIMPORT_CROSSWALK_ENTITYREGISTRY) ||
+													pidProvenance.equals("ORCID_ENRICHMENT")) {
 													p.getQualifier().setClassid(ModelConstants.ORCID);
 												} else {
 													p.getQualifier().setClassid(ModelConstants.ORCID_PENDING);
@@ -368,11 +748,54 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 				} else if (value instanceof Software) {
 
 				}
+
+			}
+
+		} else if (value instanceof Relation) {
+			Relation r = (Relation) value;
+
+			Optional<String> validationDate = doCleanDate(r.getValidationDate());
+			if (validationDate.isPresent()) {
+				r.setValidationDate(validationDate.get());
+				r.setValidated(true);
+			} else {
+				r.setValidationDate(null);
+				r.setValidated(false);
+			}
 		}
 
 		return value;
 	}
 
+	private static Author cleanupAuthor(Author author) {
+		if (StringUtils.isNotBlank(author.getFullname())) {
+			author
+				.setFullname(
+					author
+						.getFullname()
+						.replaceAll(NAME_CLEANING_REGEX, " ")
+						.replace("\"", "\\\""));
+		}
+		if (StringUtils.isNotBlank(author.getName())) {
+			author
+				.setName(
+					author
+						.getName()
+						.replaceAll(NAME_CLEANING_REGEX, " ")
+						.replace("\"", "\\\""));
+		}
+		if (StringUtils.isNotBlank(author.getSurname())) {
+			author
+				.setSurname(
+					author
+						.getSurname()
+						.replaceAll(NAME_CLEANING_REGEX, " ")
+						.replace("\"", "\\\""));
+		}
+
+		return author;
+	}
+
 	private static Optional<String> cleanDateField(Field<String> dateofacceptance) {
 		return Optional
 			.ofNullable(dateofacceptance)
@@ -406,14 +829,32 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 	// HELPERS
 
 	private static boolean isValidAuthorName(Author a) {
-		return !Stream
+		return StringUtils.isNotBlank(a.getFullname()) &&
+			StringUtils.isNotBlank(a.getFullname().replaceAll("[\\W]", "")) &&
+			!INVALID_AUTHOR_NAMES.contains(StringUtils.lowerCase(a.getFullname()).trim()) &&
+			!Stream
 				.of(a.getFullname(), a.getName(), a.getSurname())
-			.filter(s -> s != null && !s.isEmpty())
+				.filter(StringUtils::isNotBlank)
 				.collect(Collectors.joining(""))
 				.toLowerCase()
 				.matches(INVALID_AUTHOR_REGEX);
 	}
 
+	private static boolean urlFilter(String u) {
+		try {
+			final URL url = new URL(u);
+			if (StringUtils.isBlank(url.getPath()) || "/".equals(url.getPath())) {
+				return false;
+			}
+			if (INVALID_URL_HOSTS.contains(url.getHost())) {
+				return false;
+			}
+			return !INVALID_URLS.contains(url.toString());
+		} catch (MalformedURLException ex) {
+			return false;
+		}
+	}
+
 	private static List<StructuredProperty> processPidCleaning(List<StructuredProperty> pids) {
 		return pids
 			.stream()
@@ -422,7 +863,7 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 			.filter(sp -> !PID_BLACKLIST.contains(sp.getValue().trim().toLowerCase()))
 			.filter(sp -> Objects.nonNull(sp.getQualifier()))
 			.filter(sp -> StringUtils.isNotBlank(sp.getQualifier().getClassid()))
-			.map(CleaningFunctions::normalizePidValue)
+			.map(PidCleaner::normalizePidValue)
 			.filter(CleaningFunctions::pidFilter)
 			.collect(Collectors.toList());
 	}
@@ -451,9 +892,115 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 		return s;
 	}
 
+	protected static Subject cleanValue(Subject s) {
+		s.setValue(s.getValue().replaceAll(CLEANING_REGEX, " "));
+		return s;
+	}
+
 	protected static Field<String> cleanValue(Field<String> s) {
 		s.setValue(s.getValue().replaceAll(CLEANING_REGEX, " "));
 		return s;
 	}
 
+	public static OafEntity applyCoarVocabularies(OafEntity entity, VocabularyGroup vocs) {
+
+		if (entity instanceof Result) {
+			final Result result = (Result) entity;
+
+			Optional
+				.ofNullable(result.getInstance())
+				.ifPresent(
+					instances -> instances
+						.forEach(
+							instance -> {
+								if (Objects.isNull(instance.getInstanceTypeMapping())) {
+									List<InstanceTypeMapping> mapping = Lists.newArrayList();
+									mapping
+										.add(
+											OafMapperUtils
+												.instanceTypeMapping(
+													instance.getInstancetype().getClassname(),
+													OPENAIRE_COAR_RESOURCE_TYPES_3_1));
+									instance.setInstanceTypeMapping(mapping);
+								}
+								Optional<InstanceTypeMapping> optionalItm = instance
+									.getInstanceTypeMapping()
+									.stream()
+									.filter(GraphCleaningFunctions::originalResourceType)
+									.findFirst();
+								if (optionalItm.isPresent()) {
+									InstanceTypeMapping coarItm = optionalItm.get();
+									Optional
+										.ofNullable(
+											vocs
+												.lookupTermBySynonym(
+													OPENAIRE_COAR_RESOURCE_TYPES_3_1, coarItm.getOriginalType()))
+										.ifPresent(type -> {
+											coarItm.setTypeCode(type.getClassid());
+											coarItm.setTypeLabel(type.getClassname());
+										});
+									final List<InstanceTypeMapping> mappings = Lists.newArrayList();
+									if (vocs.vocabularyExists(OPENAIRE_USER_RESOURCE_TYPES)) {
+										Optional
+											.ofNullable(
+												vocs
+													.lookupTermBySynonym(
+														OPENAIRE_USER_RESOURCE_TYPES, coarItm.getTypeCode()))
+											.ifPresent(
+												type -> mappings
+													.add(
+														OafMapperUtils
+															.instanceTypeMapping(coarItm.getTypeCode(), type)));
+									}
+									if (!mappings.isEmpty()) {
+										instance.getInstanceTypeMapping().addAll(mappings);
+									}
+								}
+							}));
+			result.setMetaResourceType(getMetaResourceType(result.getInstance(), vocs));
+		}
+
+		return entity;
+	}
+
+	private static boolean originalResourceType(InstanceTypeMapping itm) {
+		return StringUtils.isNotBlank(itm.getOriginalType()) &&
+			OPENAIRE_COAR_RESOURCE_TYPES_3_1.equals(itm.getVocabularyName()) &&
+			StringUtils.isBlank(itm.getTypeCode()) &&
+			StringUtils.isBlank(itm.getTypeLabel());
+	}
+
+	private static Qualifier getMetaResourceType(final List<Instance> instances, final VocabularyGroup vocs) {
+		return Optional
+			.ofNullable(instances)
+			.map(ii -> {
+				if (vocs.vocabularyExists(OPENAIRE_META_RESOURCE_TYPE)) {
+					Optional<InstanceTypeMapping> itm = ii
+						.stream()
+						.filter(Objects::nonNull)
+						.flatMap(
+							i -> Optional
+								.ofNullable(i.getInstanceTypeMapping())
+								.map(Collection::stream)
+								.orElse(Stream.empty()))
+						.filter(t -> OPENAIRE_COAR_RESOURCE_TYPES_3_1.equals(t.getVocabularyName()))
+						.findFirst();
+
+					if (!itm.isPresent() || Objects.isNull(itm.get().getTypeCode())) {
+						return null;
+					} else {
+						final String typeCode = itm.get().getTypeCode();
+						return Optional
+							.ofNullable(vocs.lookupTermBySynonym(OPENAIRE_META_RESOURCE_TYPE, typeCode))
+							.orElseThrow(
+								() -> new IllegalStateException("unable to find a synonym for '" + typeCode + "' in " +
+									OPENAIRE_META_RESOURCE_TYPE));
+					}
+				} else {
+					throw new IllegalStateException("vocabulary '" + OPENAIRE_META_RESOURCE_TYPE + "' not available");
+				}
+			})
+			.orElse(null);
+	}
+
 }

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/GridCleaningRule.java

@@ -0,0 +1,24 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class GridCleaningRule {
+
+	public static final Pattern PATTERN = Pattern.compile("(?<grid>\\d{4,6}\\.[0-9a-z]{1,2})");
+
+	public static String clean(String grid) {
+		String s = grid
+			.replaceAll("\\s", "")
+			.toLowerCase();
+
+		Matcher m = PATTERN.matcher(s);
+		if (m.find()) {
+			return "grid." + m.group("grid");
+		}
+
+		return "";
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/ISNICleaningRule.java

@@ -0,0 +1,21 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+// https://www.wikidata.org/wiki/Property:P213
+public class ISNICleaningRule {
+
+	public static final Pattern PATTERN = Pattern.compile("([0]{4}) ?([0-9]{4}) ?([0-9]{4}) ?([0-9]{3}[0-9X])");
+
+	public static String clean(final String isni) {
+
+		Matcher m = PATTERN.matcher(isni);
+		if (m.find()) {
+			return String.join("", m.group(1), m.group(2), m.group(3), m.group(4));
+		} else {
+			return "";
+		}
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/IdentifierFactory.java

@@ -0,0 +1,294 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static eu.dnetlib.dhp.schema.common.ModelConstants.*;
+
+import java.io.Serializable;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.util.*;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.apache.commons.codec.binary.Hex;
+import org.apache.commons.lang3.StringUtils;
+
+import com.google.common.collect.HashBiMap;
+import com.google.common.collect.Maps;
+
+import eu.dnetlib.dhp.schema.common.ModelSupport;
+import eu.dnetlib.dhp.schema.oaf.*;
+
+/**
+ * Factory class for OpenAIRE identifiers in the Graph
+ */
+public class IdentifierFactory implements Serializable {
+
+	public static final String ID_SEPARATOR = "::";
+	public static final String ID_PREFIX_SEPARATOR = "|";
+
+	public static final int ID_PREFIX_LEN = 12;
+
+	/**
+	 * Declares the associations PID_TYPE -> [DATASOURCE ID, NAME] considered authoritative for that PID_TYPE.
+	 * The id of the record (source_::id) will be rewritten as pidType_::id)
+	 */
+	public static final Map<PidType, HashBiMap<String, String>> PID_AUTHORITY = Maps.newHashMap();
+
+	static {
+		PID_AUTHORITY.put(PidType.doi, HashBiMap.create());
+		PID_AUTHORITY.get(PidType.doi).put(CROSSREF_ID, "Crossref");
+		PID_AUTHORITY.get(PidType.doi).put(DATACITE_ID, "Datacite");
+		PID_AUTHORITY.get(PidType.doi).put(ZENODO_OD_ID, "ZENODO");
+		PID_AUTHORITY.get(PidType.doi).put(ZENODO_R3_ID, "Zenodo");
+
+		PID_AUTHORITY.put(PidType.pmc, HashBiMap.create());
+		PID_AUTHORITY.get(PidType.pmc).put(EUROPE_PUBMED_CENTRAL_ID, "Europe PubMed Central");
+		PID_AUTHORITY.get(PidType.pmc).put(PUBMED_CENTRAL_ID, "PubMed Central");
+
+		PID_AUTHORITY.put(PidType.pmid, HashBiMap.create());
+		PID_AUTHORITY.get(PidType.pmid).put(EUROPE_PUBMED_CENTRAL_ID, "Europe PubMed Central");
+		PID_AUTHORITY.get(PidType.pmid).put(PUBMED_CENTRAL_ID, "PubMed Central");
+
+		PID_AUTHORITY.put(PidType.arXiv, HashBiMap.create());
+		PID_AUTHORITY.get(PidType.arXiv).put(ARXIV_ID, "arXiv.org e-Print Archive");
+
+		PID_AUTHORITY.put(PidType.w3id, HashBiMap.create());
+		PID_AUTHORITY.get(PidType.w3id).put(ROHUB_ID, "ROHub");
+	}
+
+	/**
+	 * Declares the associations PID_TYPE -> [DATASOURCE ID, PID SUBSTRING] considered as delegated authority for that
+	 * PID_TYPE. Example, Zenodo is delegated to forge DOIs that contain the 'zenodo' word.
+	 *
+	 * If a record with the same id (same pid) comes from 2 data sources, the one coming from a delegated source wins. E.g. Zenodo records win over those from Datacite.
+	 * See also https://code-repo.d4science.org/D-Net/dnet-hadoop/pulls/187 and the class dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/OafMapperUtils.java
+	 */
+	public static final Map<PidType, Map<String, String>> DELEGATED_PID_AUTHORITY = Maps.newHashMap();
+
+	static {
+		DELEGATED_PID_AUTHORITY.put(PidType.doi, new HashMap<>());
+		DELEGATED_PID_AUTHORITY.get(PidType.doi).put(ZENODO_OD_ID, "zenodo");
+		DELEGATED_PID_AUTHORITY.get(PidType.doi).put(ZENODO_R3_ID, "zenodo");
+		DELEGATED_PID_AUTHORITY.put(PidType.w3id, new HashMap<>());
+		DELEGATED_PID_AUTHORITY.get(PidType.w3id).put(ROHUB_ID, "ro-id");
+	}
+
+	/**
+	 * Declares the associations PID_TYPE -> [DATASOURCE ID, NAME] whose records are considered enrichment for the graph.
+	 * Their OpenAIRE ID is built from the declared PID type. Are merged with their corresponding record, identified by
+	 * the same OpenAIRE id.
+	 */
+	public static final Map<PidType, HashBiMap<String, String>> ENRICHMENT_PROVIDER = Maps.newHashMap();
+
+	static {
+		ENRICHMENT_PROVIDER.put(PidType.doi, HashBiMap.create());
+		ENRICHMENT_PROVIDER.get(PidType.doi).put(OPEN_APC_ID, OPEN_APC_NAME);
+	}
+
+	public static Set<String> delegatedAuthorityDatasourceIds() {
+		return DELEGATED_PID_AUTHORITY
+			.values()
+			.stream()
+			.flatMap(m -> m.keySet().stream())
+			.collect(Collectors.toCollection(HashSet::new));
+	}
+
+	public static List<StructuredProperty> getPids(List<StructuredProperty> pid, KeyValue collectedFrom) {
+		return pidFromInstance(pid, collectedFrom, true).distinct().collect(Collectors.toList());
+	}
+
+	public static <T extends Result> String createDOIBoostIdentifier(T entity) {
+		if (entity == null)
+			return null;
+
+		StructuredProperty pid = null;
+		if (entity.getPid() != null) {
+			pid = entity
+				.getPid()
+				.stream()
+				.filter(Objects::nonNull)
+				.filter(s -> s.getQualifier() != null && "doi".equalsIgnoreCase(s.getQualifier().getClassid()))
+				.filter(CleaningFunctions::pidFilter)
+				.findAny()
+				.orElse(null);
+		} else {
+			if (entity.getInstance() != null) {
+				pid = entity
+					.getInstance()
+					.stream()
+					.filter(i -> i.getPid() != null)
+					.flatMap(i -> i.getPid().stream())
+					.filter(CleaningFunctions::pidFilter)
+					.findAny()
+					.orElse(null);
+			}
+		}
+		if (pid != null)
+			return idFromPid(entity, pid, true);
+		return null;
+	}
+
+	/**
+	 * Creates an identifier from the most relevant PID (if available) provided by a known PID authority in the given
+	 * entity T. Returns entity.id when none of the PIDs meet the selection criteria is available.
+	 *
+	 * @param entity the entity providing PIDs and a default ID.
+	 * @param <T> the specific entity type. Currently Organization and Result subclasses are supported.
+	 * @param md5 indicates whether should hash the PID value or not.
+	 * @return an identifier from the most relevant PID, entity.id otherwise
+	 */
+	public static <T extends OafEntity> String createIdentifier(T entity, boolean md5) {
+
+		checkArgument(StringUtils.isNoneBlank(entity.getId()), "missing entity identifier");
+
+		final Map<String, Set<StructuredProperty>> pids = extractPids(entity);
+
+		return pids
+			.values()
+			.stream()
+			.flatMap(Set::stream)
+			.min(new PidComparator<>(entity))
+			.map(
+				min -> Optional
+					.ofNullable(pids.get(min.getQualifier().getClassid()))
+					.map(
+						p -> p
+							.stream()
+							.sorted(new PidValueComparator())
+							.findFirst()
+							.map(s -> idFromPid(entity, s, md5))
+							.orElseGet(entity::getId))
+					.orElseGet(entity::getId))
+			.orElseGet(entity::getId);
+	}
+
+	private static <T extends OafEntity> Map<String, Set<StructuredProperty>> extractPids(T entity) {
+		if (entity instanceof Result) {
+			return Optional
+				.ofNullable(((Result) entity).getInstance())
+				.map(IdentifierFactory::mapPids)
+				.orElse(new HashMap<>());
+		} else {
+			return entity
+				.getPid()
+				.stream()
+				.map(CleaningFunctions::normalizePidValue)
+				.filter(CleaningFunctions::pidFilter)
+				.collect(
+					Collectors
+						.groupingBy(
+							p -> p.getQualifier().getClassid(),
+							Collectors.mapping(p -> p, Collectors.toCollection(HashSet::new))));
+		}
+	}
+
+	private static Map<String, Set<StructuredProperty>> mapPids(List<Instance> instance) {
+		return instance
+			.stream()
+			.map(i -> pidFromInstance(i.getPid(), i.getCollectedfrom(), false))
+			.flatMap(Function.identity())
+			.collect(
+				Collectors
+					.groupingBy(
+						p -> p.getQualifier().getClassid(),
+						Collectors.mapping(p -> p, Collectors.toCollection(HashSet::new))));
+	}
+
+	private static Stream<StructuredProperty> pidFromInstance(List<StructuredProperty> pid, KeyValue collectedFrom,
+		boolean mapHandles) {
+		return Optional
+			.ofNullable(pid)
+			.map(
+				pp -> pp
+					.stream()
+					// filter away PIDs provided by a DS that is not considered an authority for the
+					// given PID Type
+					.filter(p -> shouldFilterPidByCriteria(collectedFrom, p, mapHandles))
+					.map(CleaningFunctions::normalizePidValue)
+					.filter(p -> isNotFromDelegatedAuthority(collectedFrom, p))
+					.filter(CleaningFunctions::pidFilter))
+			.orElse(Stream.empty());
+	}
+
+	private static boolean shouldFilterPidByCriteria(KeyValue collectedFrom, StructuredProperty p, boolean mapHandles) {
+		final PidType pType = PidType.tryValueOf(p.getQualifier().getClassid());
+
+		if (Objects.isNull(collectedFrom)) {
+			return false;
+		}
+
+		boolean isEnrich = Optional
+			.ofNullable(ENRICHMENT_PROVIDER.get(pType))
+			.map(
+				enrich -> enrich.containsKey(collectedFrom.getKey())
+					|| enrich.containsValue(collectedFrom.getValue()))
+			.orElse(false);
+
+		boolean isAuthority = Optional
+			.ofNullable(PID_AUTHORITY.get(pType))
+			.map(
+				authorities -> authorities.containsKey(collectedFrom.getKey())
+					|| authorities.containsValue(collectedFrom.getValue()))
+			.orElse(false);
+
+		return (mapHandles && pType.equals(PidType.handle)) || isEnrich || isAuthority;
+	}
+
+	private static boolean isNotFromDelegatedAuthority(KeyValue collectedFrom, StructuredProperty p) {
+		final PidType pType = PidType.tryValueOf(p.getQualifier().getClassid());
+
+		final Map<String, String> da = DELEGATED_PID_AUTHORITY.get(pType);
+		if (Objects.isNull(da)) {
+			return true;
+		}
+		if (!da.containsKey(collectedFrom.getKey())) {
+			return true;
+		}
+		return StringUtils.contains(p.getValue(), da.get(collectedFrom.getKey()));
+	}
+
+	/**
+	 * @see {@link IdentifierFactory#createIdentifier(OafEntity, boolean)}
+	 */
+	public static <T extends OafEntity> String createIdentifier(T entity) {
+
+		return createIdentifier(entity, true);
+	}
+
+	private static <T extends OafEntity> String idFromPid(T entity, StructuredProperty s, boolean md5) {
+		return idFromPid(ModelSupport.getIdPrefix(entity.getClass()), s.getQualifier().getClassid(), s.getValue(), md5);
+	}
+
+	public static String idFromPid(String numericPrefix, String pidType, String pidValue, boolean md5) {
+		return new StringBuilder()
+			.append(numericPrefix)
+			.append(ID_PREFIX_SEPARATOR)
+			.append(createPrefix(pidType))
+			.append(ID_SEPARATOR)
+			.append(md5 ? md5(pidValue) : pidValue)
+			.toString();
+	}
+
+	// create the prefix (length = 12)
+	private static String createPrefix(String pidType) {
+		StringBuilder prefix = new StringBuilder(StringUtils.left(pidType, ID_PREFIX_LEN));
+		while (prefix.length() < ID_PREFIX_LEN) {
+			prefix.append("_");
+		}
+		return prefix.substring(0, ID_PREFIX_LEN);
+	}
+
+	public static String md5(final String s) {
+		try {
+			final MessageDigest md = MessageDigest.getInstance("MD5");
+			md.update(s.getBytes(StandardCharsets.UTF_8));
+			return new String(Hex.encodeHex(md.digest()));
+		} catch (final Exception e) {
+			return null;
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/MergeComparator.java

@@ -0,0 +1,78 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+// 
+// Source code recreated from a .class file by IntelliJ IDEA
+// (powered by FernFlower decompiler)
+//
+import eu.dnetlib.dhp.schema.common.EntityType;
+import eu.dnetlib.dhp.schema.oaf.KeyValue;
+import eu.dnetlib.dhp.schema.oaf.Oaf;
+import eu.dnetlib.dhp.schema.oaf.OafEntity;
+import eu.dnetlib.dhp.schema.oaf.Result;
+
+public class MergeComparator implements Comparator<Oaf> {
+	public MergeComparator() {
+	}
+
+	public int compare(Oaf left, Oaf right) {
+		// nulls at the end
+		if (left == null && right == null) {
+			return 0;
+		} else if (left == null) {
+			return -1;
+		} else if (right == null) {
+			return 1;
+		}
+
+		// invisible
+		if (left.getDataInfo() != null && left.getDataInfo().getInvisible() == true) {
+			if (right.getDataInfo() != null && right.getDataInfo().getInvisible() == false) {
+				return -1;
+			}
+		}
+
+		// collectedfrom
+		HashSet<String> lCf = getCollectedFromIds(left);
+		HashSet<String> rCf = getCollectedFromIds(right);
+		if (lCf.contains("10|openaire____::081b82f96300b6a6e3d282bad31cb6e2")
+			&& !rCf.contains("10|openaire____::081b82f96300b6a6e3d282bad31cb6e2")) {
+			return -1;
+		} else if (!lCf.contains("10|openaire____::081b82f96300b6a6e3d282bad31cb6e2")
+			&& rCf.contains("10|openaire____::081b82f96300b6a6e3d282bad31cb6e2")) {
+			return 1;
+		}
+
+		SubEntityType lClass = SubEntityType.fromClass(left.getClass());
+		SubEntityType rClass = SubEntityType.fromClass(right.getClass());
+		return lClass.ordinal() - rClass.ordinal();
+
+	}
+
+	protected HashSet<String> getCollectedFromIds(Oaf left) {
+		return (HashSet) Optional.ofNullable(left.getCollectedfrom()).map((cf) -> {
+			return (HashSet) cf.stream().map(KeyValue::getKey).collect(Collectors.toCollection(HashSet::new));
+		}).orElse(new HashSet());
+	}
+
+	enum SubEntityType {
+		publication, dataset, software, otherresearchproduct, datasource, organization, project;
+
+		/**
+		 * Resolves the EntityType, given the relative class name
+		 *
+		 * @param clazz the given class name
+		 * @param <T> actual OafEntity subclass
+		 * @return the EntityType associated to the given class
+		 */
+		public static <T extends Oaf> SubEntityType fromClass(Class<T> clazz) {
+			return valueOf(clazz.getSimpleName().toLowerCase());
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/MergeEntitiesComparator.java

@@ -0,0 +1,106 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.*;
+
+import eu.dnetlib.dhp.schema.common.ModelConstants;
+import eu.dnetlib.dhp.schema.oaf.Oaf;
+import eu.dnetlib.dhp.schema.oaf.OafEntity;
+import eu.dnetlib.dhp.schema.oaf.Result;
+
+public class MergeEntitiesComparator implements Comparator<Oaf> {
+	static final List<String> PID_AUTHORITIES = Arrays
+		.asList(
+			ModelConstants.ARXIV_ID,
+			ModelConstants.PUBMED_CENTRAL_ID,
+			ModelConstants.EUROPE_PUBMED_CENTRAL_ID,
+			ModelConstants.DATACITE_ID,
+			ModelConstants.CROSSREF_ID);
+
+	static final List<String> RESULT_TYPES = Arrays
+		.asList(
+			ModelConstants.ORP_RESULTTYPE_CLASSID,
+			ModelConstants.SOFTWARE_RESULTTYPE_CLASSID,
+			ModelConstants.DATASET_RESULTTYPE_CLASSID,
+			ModelConstants.PUBLICATION_RESULTTYPE_CLASSID);
+
+	public static final Comparator<Oaf> INSTANCE = new MergeEntitiesComparator();
+
+	@Override
+	public int compare(Oaf left, Oaf right) {
+		if (left == null && right == null)
+			return 0;
+		if (left == null)
+			return -1;
+		if (right == null)
+			return 1;
+
+		int res = 0;
+
+		// pid authority
+		int cfp1 = Optional
+			.ofNullable(left.getCollectedfrom())
+			.map(
+				cf -> cf
+					.stream()
+					.map(kv -> PID_AUTHORITIES.indexOf(kv.getKey()))
+					.max(Integer::compare)
+					.orElse(-1))
+			.orElse(-1);
+		int cfp2 = Optional
+			.ofNullable(right.getCollectedfrom())
+			.map(
+				cf -> cf
+					.stream()
+					.map(kv -> PID_AUTHORITIES.indexOf(kv.getKey()))
+					.max(Integer::compare)
+					.orElse(-1))
+			.orElse(-1);
+
+		if (cfp1 >= 0 && cfp1 > cfp2) {
+			return 1;
+		} else if (cfp2 >= 0 && cfp2 > cfp1) {
+			return -1;
+		}
+
+		// trust
+		if (left.getDataInfo() != null && right.getDataInfo() != null) {
+			res = left.getDataInfo().getTrust().compareTo(right.getDataInfo().getTrust());
+		}
+
+		// result type
+		if (res == 0) {
+			if (left instanceof Result && right instanceof Result) {
+				Result r1 = (Result) left;
+				Result r2 = (Result) right;
+
+				if (r1.getResulttype() == null || r1.getResulttype().getClassid() == null) {
+					if (r2.getResulttype() != null && r2.getResulttype().getClassid() != null) {
+						return -1;
+					}
+				} else if (r2.getResulttype() == null || r2.getResulttype().getClassid() == null) {
+					return 1;
+				}
+
+				int rt1 = RESULT_TYPES.indexOf(r1.getResulttype().getClassid());
+				int rt2 = RESULT_TYPES.indexOf(r2.getResulttype().getClassid());
+
+				if (rt1 >= 0 && rt1 > rt2) {
+					return 1;
+				} else if (rt2 >= 0 && rt2 > rt1) {
+					return -1;
+				}
+			}
+		}
+
+		// id
+		if (res == 0) {
+			if (left instanceof OafEntity && right instanceof OafEntity) {
+				res = ((OafEntity) left).getId().compareTo(((OafEntity) right).getId());
+			}
+		}
+
+		return res;
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/ModelHardLimits.java

@@ -0,0 +1,27 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+public class ModelHardLimits {
+
+	private ModelHardLimits() {
+	}
+
+	public static final String LAYOUT = "index";
+	public static final String INTERPRETATION = "openaire";
+	public static final String SEPARATOR = "-";
+
+	public static final int MAX_EXTERNAL_ENTITIES = 50;
+	public static final int MAX_AUTHORS = 200;
+	public static final int MAX_AUTHOR_FULLNAME_LENGTH = 1000;
+	public static final int MAX_TITLE_LENGTH = 5000;
+	public static final int MAX_TITLES = 10;
+	public static final int MAX_ABSTRACTS = 10;
+	public static final int MAX_ABSTRACT_LENGTH = 150000;
+	public static final int MAX_RELATED_ABSTRACT_LENGTH = 500;
+	public static final int MAX_INSTANCES = 10;
+
+	public static String getCollectionName(String format) {
+		return format + SEPARATOR + LAYOUT + SEPARATOR + INTERPRETATION;
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/OafMapperUtils.java

@@ -3,6 +3,8 @@ package eu.dnetlib.dhp.schema.oaf.utils;
 
 import static eu.dnetlib.dhp.schema.common.ModelConstants.*;
 
+import java.sql.Array;
+import java.sql.SQLException;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Function;
@@ -12,45 +14,11 @@ import java.util.stream.Collectors;
 import org.apache.commons.lang3.StringUtils;
 
 import eu.dnetlib.dhp.schema.common.AccessRightComparator;
-import eu.dnetlib.dhp.schema.common.ModelSupport;
 import eu.dnetlib.dhp.schema.oaf.*;
 
 public class OafMapperUtils {
 
-	public static Oaf merge(final Oaf left, final Oaf right) {
-		if (ModelSupport.isSubClass(left, OafEntity.class)) {
-			return mergeEntities((OafEntity) left, (OafEntity) right);
-		} else if (ModelSupport.isSubClass(left, Relation.class)) {
-			((Relation) left).mergeFrom((Relation) right);
-		} else {
-			throw new RuntimeException("invalid Oaf type:" + left.getClass().getCanonicalName());
-		}
-		return left;
-	}
-
-	public static OafEntity mergeEntities(OafEntity left, OafEntity right) {
-		if (ModelSupport.isSubClass(left, Result.class)) {
-			return mergeResults((Result) left, (Result) right);
-		} else if (ModelSupport.isSubClass(left, Datasource.class)) {
-			left.mergeFrom(right);
-		} else if (ModelSupport.isSubClass(left, Organization.class)) {
-			left.mergeFrom(right);
-		} else if (ModelSupport.isSubClass(left, Project.class)) {
-			left.mergeFrom(right);
-		} else {
-			throw new RuntimeException("invalid OafEntity subtype:" + left.getClass().getCanonicalName());
-		}
-		return left;
-	}
-
-	public static Result mergeResults(Result left, Result right) {
-		if (new ResultTypeComparator().compare(left, right) < 0) {
-			left.mergeFrom(right);
-			return left;
-		} else {
-			right.mergeFrom(left);
-			return right;
-		}
+	private OafMapperUtils() {
 	}
 
 	public static KeyValue keyValue(final String k, final String v) {
@@ -62,7 +30,7 @@ public class OafMapperUtils {
 
 	public static List<KeyValue> listKeyValues(final String... s) {
 		if (s.length % 2 > 0) {
-			throw new RuntimeException("Invalid number of parameters (k,v,k,v,....)");
+			throw new IllegalArgumentException("Invalid number of parameters (k,v,k,v,....)");
 		}
 
 		final List<KeyValue> list = new ArrayList<>();
@@ -88,7 +56,18 @@ public class OafMapperUtils {
 			.stream(values)
 			.map(v -> field(v, info))
 			.filter(Objects::nonNull)
-			.filter(distinctByKey(f -> f.getValue()))
+			.filter(distinctByKey(Field::getValue))
+			.collect(Collectors.toList());
+	}
+
+	public static <T> List<T> listValues(Array values) throws SQLException {
+		if (Objects.isNull(values)) {
+			return null;
+		}
+		return Arrays
+			.stream((T[]) values.getArray())
+			.filter(Objects::nonNull)
+			.distinct()
 			.collect(Collectors.toList());
 	}
 
@@ -97,12 +76,34 @@ public class OafMapperUtils {
 			.stream()
 			.map(v -> field(v, info))
 			.filter(Objects::nonNull)
-			.filter(distinctByKey(f -> f.getValue()))
+			.filter(distinctByKey(Field::getValue))
 			.collect(Collectors.toList());
 	}
 
+	public static InstanceTypeMapping instanceTypeMapping(String originalType, String code, String label,
+		String vocabularyName) {
+		final InstanceTypeMapping m = new InstanceTypeMapping();
+		m.setVocabularyName(vocabularyName);
+		m.setOriginalType(originalType);
+		m.setTypeCode(code);
+		m.setTypeLabel(label);
+		return m;
+	}
+
+	public static InstanceTypeMapping instanceTypeMapping(String originalType, Qualifier term) {
+		return instanceTypeMapping(originalType, term.getClassid(), term.getClassname(), term.getSchemeid());
+	}
+
+	public static InstanceTypeMapping instanceTypeMapping(String originalType) {
+		return instanceTypeMapping(originalType, null, null, null);
+	}
+
+	public static InstanceTypeMapping instanceTypeMapping(String originalType, String vocabularyName) {
+		return instanceTypeMapping(originalType, null, null, vocabularyName);
+	}
+
 	public static Qualifier unknown(final String schemeid, final String schemename) {
-		return qualifier("UNKNOWN", "Unknown", schemeid, schemename);
+		return qualifier(UNKNOWN, "Unknown", schemeid, schemename);
 	}
 
 	public static AccessRight accessRight(
@@ -150,6 +151,17 @@ public class OafMapperUtils {
 		return q;
 	}
 
+	public static Subject subject(
+		final String value,
+		final String classid,
+		final String classname,
+		final String schemeid,
+		final String schemename,
+		final DataInfo dataInfo) {
+
+		return subject(value, qualifier(classid, classname, schemeid, schemename), dataInfo);
+	}
+
 	public static StructuredProperty structuredProperty(
 		final String value,
 		final String classid,
@@ -161,6 +173,20 @@ public class OafMapperUtils {
 		return structuredProperty(value, qualifier(classid, classname, schemeid, schemename), dataInfo);
 	}
 
+	public static Subject subject(
+		final String value,
+		final Qualifier qualifier,
+		final DataInfo dataInfo) {
+		if (value == null) {
+			return null;
+		}
+		final Subject s = new Subject();
+		s.setValue(value);
+		s.setQualifier(qualifier);
+		s.setDataInfo(dataInfo);
+		return s;
+	}
+
 	public static StructuredProperty structuredProperty(
 		final String value,
 		final Qualifier qualifier,
@@ -342,10 +368,10 @@ public class OafMapperUtils {
 		if (instanceList != null) {
 			final Optional<AccessRight> min = instanceList
 				.stream()
-				.map(i -> i.getAccessright())
+				.map(Instance::getAccessright)
 				.min(new AccessRightComparator<>());
 
-			final Qualifier rights = min.isPresent() ? qualifier(min.get()) : new Qualifier();
+			final Qualifier rights = min.map(OafMapperUtils::qualifier).orElseGet(Qualifier::new);
 
 			if (StringUtils.isBlank(rights.getClassid())) {
 				rights.setClassid(UNKNOWN);
@@ -365,4 +391,88 @@ public class OafMapperUtils {
 		}
 		return null;
 	}
+
+	public static KeyValue newKeyValueInstance(String key, String value, DataInfo dataInfo) {
+		KeyValue kv = new KeyValue();
+		kv.setDataInfo(dataInfo);
+		kv.setKey(key);
+		kv.setValue(value);
+		return kv;
+	}
+
+	public static Measure newMeasureInstance(String id, String value, String key, DataInfo dataInfo) {
+		Measure m = new Measure();
+		m.setId(id);
+		m.setUnit(Arrays.asList(newKeyValueInstance(key, value, dataInfo)));
+		return m;
+	}
+
+	public static Relation getRelation(final String source,
+		final String target,
+		final String relType,
+		final String subRelType,
+		final String relClass,
+		final OafEntity entity) {
+		return getRelation(source, target, relType, subRelType, relClass, entity, null);
+	}
+
+	public static Relation getRelation(final String source,
+		final String target,
+		final String relType,
+		final String subRelType,
+		final String relClass,
+		final OafEntity entity,
+		final String validationDate) {
+		return getRelation(
+			source, target, relType, subRelType, relClass, entity.getCollectedfrom(), entity.getDataInfo(),
+			entity.getLastupdatetimestamp(), validationDate, null);
+	}
+
+	public static Relation getRelation(final String source,
+		final String target,
+		final String relType,
+		final String subRelType,
+		final String relClass,
+		final List<KeyValue> collectedfrom,
+		final DataInfo dataInfo,
+		final Long lastupdatetimestamp) {
+		return getRelation(
+			source, target, relType, subRelType, relClass, collectedfrom, dataInfo, lastupdatetimestamp, null, null);
+	}
+
+	public static Relation getRelation(final String source,
+		final String target,
+		final String relType,
+		final String subRelType,
+		final String relClass,
+		final List<KeyValue> collectedfrom,
+		final DataInfo dataInfo,
+		final Long lastupdatetimestamp,
+		final String validationDate,
+		final List<KeyValue> properties) {
+		final Relation rel = new Relation();
+		rel.setRelType(relType);
+		rel.setSubRelType(subRelType);
+		rel.setRelClass(relClass);
+		rel.setSource(source);
+		rel.setTarget(target);
+		rel.setCollectedfrom(collectedfrom);
+		rel.setDataInfo(dataInfo);
+		rel.setLastupdatetimestamp(lastupdatetimestamp);
+		rel.setValidated(StringUtils.isNotBlank(validationDate));
+		rel.setValidationDate(StringUtils.isNotBlank(validationDate) ? validationDate : null);
+		rel.setProperties(properties);
+		return rel;
+	}
+
+	public static String getProvenance(DataInfo dataInfo) {
+		return Optional
+			.ofNullable(dataInfo)
+			.map(
+				d -> Optional
+					.ofNullable(d.getProvenanceaction())
+					.map(Qualifier::getClassid)
+					.orElse(""))
+			.orElse("");
+	}
 }

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/OrganizationPidComparator.java

@@ -0,0 +1,46 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.Comparator;
+
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+
+public class OrganizationPidComparator implements Comparator<StructuredProperty> {
+
+	@Override
+	public int compare(StructuredProperty left, StructuredProperty right) {
+		if (left == null) {
+			return right == null ? 0 : -1;
+		} else if (right == null) {
+			return 1;
+		}
+
+		PidType lClass = PidType.tryValueOf(left.getQualifier().getClassid());
+		PidType rClass = PidType.tryValueOf(right.getQualifier().getClassid());
+
+		if (lClass.equals(rClass))
+			return 0;
+
+		if (lClass.equals(PidType.openorgs))
+			return -1;
+		if (rClass.equals(PidType.openorgs))
+			return 1;
+
+		if (lClass.equals(PidType.GRID))
+			return -1;
+		if (rClass.equals(PidType.GRID))
+			return 1;
+
+		if (lClass.equals(PidType.mag_id))
+			return -1;
+		if (rClass.equals(PidType.mag_id))
+			return 1;
+
+		if (lClass.equals(PidType.urn))
+			return -1;
+		if (rClass.equals(PidType.urn))
+			return 1;
+
+		return 0;
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PICCleaningRule.java

@@ -0,0 +1,21 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class PICCleaningRule {
+
+	public static final Pattern PATTERN = Pattern.compile("\\d{9}");
+
+	public static String clean(final String pic) {
+
+		Matcher m = PATTERN.matcher(pic);
+		if (m.find()) {
+			return m.group();
+		} else {
+			return "";
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PidBlacklist.java

@@ -0,0 +1,8 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.HashMap;
+import java.util.HashSet;
+
+public class PidBlacklist extends HashMap<String, HashSet<String>> {
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PidBlacklistProvider.java

@@ -0,0 +1,40 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Optional;
+import java.util.Set;
+
+import org.apache.commons.io.IOUtils;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class PidBlacklistProvider {
+
+	private static final PidBlacklist blacklist;
+
+	static {
+		try {
+			String json = IOUtils.toString(IdentifierFactory.class.getResourceAsStream("pid_blacklist.json"));
+			blacklist = new ObjectMapper().readValue(json, PidBlacklist.class);
+
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	public static PidBlacklist getBlacklist() {
+		return blacklist;
+	}
+
+	public static Set<String> getBlacklist(String pidType) {
+		return Optional
+			.ofNullable(getBlacklist().get(pidType))
+			.orElse(new HashSet<>());
+	}
+
+	private PidBlacklistProvider() {
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PidCleaner.java

@@ -0,0 +1,62 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.Optional;
+
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+
+public class PidCleaner {
+
+	/**
+	 * Utility method that normalises PID values on a per-type basis.
+	 * @param pid the PID whose value will be normalised.
+	 * @return the PID containing the normalised value.
+	 */
+	public static StructuredProperty normalizePidValue(StructuredProperty pid) {
+		pid
+			.setValue(
+				normalizePidValue(
+					pid.getQualifier().getClassid(),
+					pid.getValue()));
+
+		return pid;
+	}
+
+	public static String normalizePidValue(String pidType, String pidValue) {
+		String value = Optional
+			.ofNullable(pidValue)
+			.map(String::trim)
+			.orElseThrow(() -> new IllegalArgumentException("PID value cannot be empty"));
+
+		switch (pidType) {
+
+			// TODO add cleaning for more PID types as needed
+
+			// Result
+			case "doi":
+				return DoiCleaningRule.clean(value);
+			case "pmid":
+				return PmidCleaningRule.clean(value);
+			case "pmc":
+				return PmcCleaningRule.clean(value);
+			case "handle":
+			case "arXiv":
+				return value;
+
+			// Organization
+			case "GRID":
+				return GridCleaningRule.clean(value);
+			case "ISNI":
+				return ISNICleaningRule.clean(value);
+			case "ROR":
+				return RorCleaningRule.clean(value);
+			case "PIC":
+				return PICCleaningRule.clean(value);
+			case "FundRef":
+				return FundRefCleaningRule.clean(value);
+			default:
+				return value;
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PidComparator.java

@@ -0,0 +1,48 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.Comparator;
+
+import eu.dnetlib.dhp.schema.common.ModelSupport;
+import eu.dnetlib.dhp.schema.oaf.OafEntity;
+import eu.dnetlib.dhp.schema.oaf.Organization;
+import eu.dnetlib.dhp.schema.oaf.Result;
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+
+public class PidComparator<T extends OafEntity> implements Comparator<StructuredProperty> {
+
+	private final T entity;
+
+	public PidComparator(T entity) {
+		this.entity = entity;
+	}
+
+	@Override
+	public int compare(StructuredProperty left, StructuredProperty right) {
+
+		if (left == null && right == null)
+			return 0;
+		if (left == null)
+			return 1;
+		if (right == null)
+			return -1;
+
+		if (ModelSupport.isSubClass(entity, Result.class)) {
+			return compareResultPids(left, right);
+		}
+		if (ModelSupport.isSubClass(entity, Organization.class)) {
+			return compareOrganizationtPids(left, right);
+		}
+
+		// Else (but unlikely), lexicographical ordering will do.
+		return left.getQualifier().getClassid().compareTo(right.getQualifier().getClassid());
+	}
+
+	private int compareResultPids(StructuredProperty left, StructuredProperty right) {
+		return new ResultPidComparator().compare(left, right);
+	}
+
+	private int compareOrganizationtPids(StructuredProperty left, StructuredProperty right) {
+		return new OrganizationPidComparator().compare(left, right);
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PidType.java

@@ -0,0 +1,79 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import org.apache.commons.lang3.EnumUtils;
+
+public enum PidType {
+
+	/**
+	 * The DOI syntax shall be made up of a DOI prefix and a DOI suffix separated by a forward slash.
+	 *
+	 * There is no defined limit on the length of the DOI name, or of the DOI prefix or DOI suffix.
+	 *
+	 * The DOI name is case-insensitive and can incorporate any printable characters from the legal graphic characters
+	 * of Unicode. Further constraints on character use (e.g. use of language-specific alphanumeric characters) can be
+	 * defined for an application by the ISO 26324 Registration Authority.
+	 *
+	 *
+	 * DOI prefix: The DOI prefix shall be composed of a directory indicator followed by a registrant code.
+	 * These two components shall be separated by a full stop (period). The directory indicator shall be "10" and
+	 * distinguishes the entire set of character strings (prefix and suffix) as digital object identifiers within the
+	 * resolution system.
+	 *
+	 * Registrant code: The second element of the DOI prefix shall be the registrant code. The registrant code is a
+	 * unique string assigned to a registrant.
+	 *
+	 * DOI suffix: The DOI suffix shall consist of a character string of any length chosen by the registrant.
+	 * Each suffix shall be unique to the prefix element that precedes it. The unique suffix can be a sequential number,
+	 * or it might incorporate an identifier generated from or based on another system used by the registrant
+	 * (e.g. ISAN, ISBN, ISRC, ISSN, ISTC, ISNI; in such cases, a preferred construction for such a suffix can be
+	 * specified, as in Example 1).
+	 *
+	 * Source: https://www.doi.org/doi_handbook/2_Numbering.html#2.2
+	 */
+	doi,
+
+	/**
+	 * PubMed Unique Identifier (PMID)
+	 *
+	 * This field is a 1-to-8 digit accession number with no leading zeros. It is present on all records and is the
+	 * accession number for managing and disseminating records. PMIDs are not reused after records are deleted.
+	 *
+	 * Beginning in February 2012 PMIDs include extensions following a decimal point to account for article versions
+	 * (e.g., 21804956.2). All citations are considered version 1 until replaced.  The extended PMID is not displayed
+	 * on the MEDLINE format.
+	 *
+	 * View the citation in abstract format in PubMed to access additional versions when available (see the article in
+	 * the Jan-Feb 2012 NLM Technical Bulletin).
+	 *
+	 * Source: https://www.nlm.nih.gov/bsd/mms/medlineelements.html#pmid
+	 */
+	pmid,
+
+	/**
+	 * This field contains the unique identifier for the cited article in PubMed Central. The identifier begins with the
+	 * prefix PMC.
+	 *
+	 * Source: https://www.nlm.nih.gov/bsd/mms/medlineelements.html#pmc
+	 */
+	pmc, handle, arXiv, nct, pdb, w3id,
+
+	// Organization
+	openorgs, ROR, GRID, PIC, ISNI, Wikidata, FundRef, corda, corda_h2020, mag_id, urn,
+
+	// Used by dedup
+	undefined, original;
+
+	public static boolean isValid(String type) {
+		return EnumUtils.isValidEnum(PidType.class, type);
+	}
+
+	public static PidType tryValueOf(String s) {
+		try {
+			return PidType.valueOf(s);
+		} catch (Exception e) {
+			return PidType.original;
+		}
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PidValueComparator.java

@@ -0,0 +1,33 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.Comparator;
+import java.util.Optional;
+
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+
+public class PidValueComparator implements Comparator<StructuredProperty> {
+
+	@Override
+	public int compare(StructuredProperty left, StructuredProperty right) {
+
+		if (left == null && right == null)
+			return 0;
+		if (left == null)
+			return 1;
+		if (right == null)
+			return -1;
+
+		StructuredProperty l = CleaningFunctions.normalizePidValue(left);
+		StructuredProperty r = CleaningFunctions.normalizePidValue(right);
+
+		return Optional
+			.ofNullable(l.getValue())
+			.map(
+				lv -> Optional
+					.ofNullable(r.getValue())
+					.map(rv -> lv.compareTo(rv))
+					.orElse(-1))
+			.orElse(1);
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PmcCleaningRule.java

@@ -0,0 +1,24 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class PmcCleaningRule {
+
+	public static final Pattern PATTERN = Pattern.compile("PMC\\d{1,8}");
+
+	public static String clean(String pmc) {
+		String s = pmc
+			.replaceAll("\\s", "")
+			.toUpperCase();
+
+		final Matcher m = PATTERN.matcher(s);
+
+		if (m.find()) {
+			return m.group();
+		}
+		return "";
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/PmidCleaningRule.java

@@ -0,0 +1,25 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+// https://researchguides.stevens.edu/c.php?g=442331&p=6577176
+public class PmidCleaningRule {
+
+	public static final Pattern PATTERN = Pattern.compile("0*(\\d{1,8})");
+
+	public static String clean(String pmid) {
+		String s = pmid
+			.toLowerCase()
+			.replaceAll("\\s", "");
+
+		final Matcher m = PATTERN.matcher(s);
+
+		if (m.find()) {
+			return m.group(1);
+		}
+		return "";
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/RefereedComparator.java

@@ -0,0 +1,46 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.Comparator;
+
+import eu.dnetlib.dhp.schema.oaf.Qualifier;
+
+/**
+ * Comparator for sorting the values from the dnet:review_levels vocabulary, implements the following ordering
+ *
+ * peerReviewed (0001) > nonPeerReviewed (0002) > UNKNOWN (0000)
+ */
+public class RefereedComparator implements Comparator<Qualifier> {
+
+	@Override
+	public int compare(Qualifier left, Qualifier right) {
+		if (left == null || left.getClassid() == null) {
+			return (right == null || right.getClassid() == null) ? 0 : -1;
+		} else if (right == null || right.getClassid() == null) {
+			return 1;
+		}
+
+		String lClass = left.getClassid();
+		String rClass = right.getClassid();
+
+		if (lClass.equals(rClass))
+			return 0;
+
+		if ("0001".equals(lClass))
+			return -1;
+		if ("0001".equals(rClass))
+			return 1;
+
+		if ("0002".equals(lClass))
+			return -1;
+		if ("0002".equals(rClass))
+			return 1;
+
+		if ("0000".equals(lClass))
+			return -1;
+		if ("0000".equals(rClass))
+			return 1;
+
+		return 0;
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/ResultPidComparator.java

@@ -0,0 +1,56 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.Comparator;
+
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+
+public class ResultPidComparator implements Comparator<StructuredProperty> {
+
+	@Override
+	public int compare(StructuredProperty left, StructuredProperty right) {
+
+		PidType lClass = PidType.tryValueOf(left.getQualifier().getClassid());
+		PidType rClass = PidType.tryValueOf(right.getQualifier().getClassid());
+
+		if (lClass.equals(rClass))
+			return 0;
+
+		if (lClass.equals(PidType.doi))
+			return -1;
+		if (rClass.equals(PidType.doi))
+			return 1;
+
+		if (lClass.equals(PidType.pmid))
+			return -1;
+		if (rClass.equals(PidType.pmid))
+			return 1;
+
+		if (lClass.equals(PidType.pmc))
+			return -1;
+		if (rClass.equals(PidType.pmc))
+			return 1;
+
+		if (lClass.equals(PidType.handle))
+			return -1;
+		if (rClass.equals(PidType.handle))
+			return 1;
+
+		if (lClass.equals(PidType.arXiv))
+			return -1;
+		if (rClass.equals(PidType.arXiv))
+			return 1;
+
+		if (lClass.equals(PidType.nct))
+			return -1;
+		if (rClass.equals(PidType.nct))
+			return 1;
+
+		if (lClass.equals(PidType.pdb))
+			return -1;
+		if (rClass.equals(PidType.pdb))
+			return 1;
+
+		return 0;
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/RorCleaningRule.java

@@ -0,0 +1,27 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+// https://ror.readme.io/docs/ror-identifier-pattern
+public class RorCleaningRule {
+
+	public static final String ROR_PREFIX = "https://ror.org/";
+
+	private static final Pattern PATTERN = Pattern.compile("(?<ror>0[a-hj-km-np-tv-z|0-9]{6}[0-9]{2})");
+
+	public static String clean(String ror) {
+		String s = ror
+			.replaceAll("\\s", "")
+			.toLowerCase();
+
+		Matcher m = PATTERN.matcher(s);
+
+		if (m.find()) {
+			return ROR_PREFIX + m.group("ror");
+		}
+		return "";
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/SubjectProvenanceComparator.java

@@ -0,0 +1,46 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import static eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils.getProvenance;
+import static org.apache.commons.lang3.StringUtils.isBlank;
+
+import java.util.Comparator;
+
+import eu.dnetlib.dhp.schema.oaf.Subject;
+
+public class SubjectProvenanceComparator implements Comparator<Subject> {
+
+	@Override
+	public int compare(Subject left, Subject right) {
+
+		String lProv = getProvenance(left.getDataInfo());
+		String rProv = getProvenance(right.getDataInfo());
+
+		if (isBlank(lProv) && isBlank(rProv))
+			return 0;
+		if (isBlank(lProv))
+			return 1;
+		if (isBlank(rProv))
+			return -1;
+		if (lProv.equals(rProv))
+			return 0;
+		if (lProv.toLowerCase().contains("crosswalk"))
+			return -1;
+		if (rProv.toLowerCase().contains("crosswalk"))
+			return 1;
+		if (lProv.toLowerCase().contains("user"))
+			return -1;
+		if (rProv.toLowerCase().contains("user"))
+			return 1;
+		if (lProv.toLowerCase().contains("propagation"))
+			return -1;
+		if (rProv.toLowerCase().contains("propagation"))
+			return 1;
+		if (lProv.toLowerCase().contains("iis"))
+			return -1;
+		if (rProv.toLowerCase().contains("iis"))
+			return 1;
+
+		return 0;
+	}
+}

dhp-common/src/main/java/eu/dnetlib/dhp/utils/DHPUtils.java

@@ -4,19 +4,19 @@ package eu.dnetlib.dhp.utils;
 import java.io.*;
 import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-import java.util.zip.GZIPInputStream;
-import java.util.zip.GZIPOutputStream;
+import java.util.*;
+import java.util.stream.Collectors;
 
-import org.apache.commons.codec.binary.Base64;
-import org.apache.commons.codec.binary.Base64OutputStream;
 import org.apache.commons.codec.binary.Hex;
 import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
 import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.SaveMode;
 import org.slf4j.Logger;
@@ -26,6 +26,8 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.Maps;
 import com.jayway.jsonpath.JsonPath;
 
+import eu.dnetlib.dhp.schema.mdstore.MDStoreWithInfo;
+import eu.dnetlib.dhp.schema.oaf.utils.CleaningFunctions;
 import net.minidev.json.JSONArray;
 import scala.collection.JavaConverters;
 import scala.collection.Seq;
@@ -34,6 +36,9 @@ public class DHPUtils {
 
 	private static final Logger log = LoggerFactory.getLogger(DHPUtils.class);
 
+	private DHPUtils() {
+	}
+
 	public static Seq<String> toSeq(List<String> list) {
 		return JavaConverters.asScalaIteratorConverter(list.iterator()).asScala().toSeq();
 	}
@@ -44,40 +49,64 @@ public class DHPUtils {
 			md.update(s.getBytes(StandardCharsets.UTF_8));
 			return new String(Hex.encodeHex(md.digest()));
 		} catch (final Exception e) {
-			System.err.println("Error creating id");
+			log.error("Error creating id from {}", s);
 			return null;
 		}
 	}
 
+	/**
+	 * Retrieves from the metadata store manager application the list of paths associated with mdstores characterized
+	 * by he given format, layout, interpretation
+	 * @param mdstoreManagerUrl the URL of the mdstore manager service
+	 * @param format the mdstore format
+	 * @param layout the mdstore layout
+	 * @param interpretation the mdstore interpretation
+	 * @param includeEmpty include Empty mdstores
+	 * @return the set of hdfs paths
+	 * @throws IOException in case of HTTP communication issues
+	 */
+	public static Set<String> mdstorePaths(final String mdstoreManagerUrl,
+		final String format,
+		final String layout,
+		final String interpretation,
+		boolean includeEmpty) throws IOException {
+		final String url = mdstoreManagerUrl + "/mdstores/";
+		final ObjectMapper objectMapper = new ObjectMapper();
+
+		final HttpGet req = new HttpGet(url);
+
+		log.info("MDStoreManager request: {}", req);
+
+		try (final CloseableHttpClient client = HttpClients.createDefault()) {
+			try (final CloseableHttpResponse response = client.execute(req)) {
+				final String json = IOUtils.toString(response.getEntity().getContent());
+
+				log.info("MDStoreManager response: {}", json);
+
+				final MDStoreWithInfo[] mdstores = objectMapper.readValue(json, MDStoreWithInfo[].class);
+				return Arrays
+					.stream(mdstores)
+					.filter(md -> md.getFormat().equalsIgnoreCase(format))
+					.filter(md -> md.getLayout().equalsIgnoreCase(layout))
+					.filter(md -> md.getInterpretation().equalsIgnoreCase(interpretation))
+					.filter(md -> StringUtils.isNotBlank(md.getHdfsPath()))
+					.filter(md -> StringUtils.isNotBlank(md.getCurrentVersion()))
+					.filter(md -> includeEmpty || md.getSize() > 0)
+					.map(md -> md.getHdfsPath() + "/" + md.getCurrentVersion() + "/store")
+					.collect(Collectors.toSet());
+			}
+		}
+	}
+
 	public static String generateIdentifier(final String originalId, final String nsPrefix) {
 		return String.format("%s::%s", nsPrefix, DHPUtils.md5(originalId));
 	}
 
-	public static String compressString(final String input) {
-		try (ByteArrayOutputStream out = new ByteArrayOutputStream();
-			Base64OutputStream b64os = new Base64OutputStream(out)) {
-			GZIPOutputStream gzip = new GZIPOutputStream(b64os);
-			gzip.write(input.getBytes(StandardCharsets.UTF_8));
-			gzip.close();
-			return out.toString();
-		} catch (Throwable e) {
-			return null;
-		}
-	}
+	public static String generateUnresolvedIdentifier(final String pid, final String pidType) {
 
-	public static String decompressString(final String input) {
-		byte[] byteArray = Base64.decodeBase64(input.getBytes());
-		int len;
-		try (GZIPInputStream gis = new GZIPInputStream(new ByteArrayInputStream((byteArray)));
-			ByteArrayOutputStream bos = new ByteArrayOutputStream(byteArray.length)) {
-			byte[] buffer = new byte[1024];
-			while ((len = gis.read(buffer)) != -1) {
-				bos.write(buffer, 0, len);
-			}
-			return bos.toString();
-		} catch (Exception e) {
-			return null;
-		}
+		final String cleanedPid = CleaningFunctions.normalizePidValue(pidType, pid);
+
+		return String.format("unresolved::%s::%s", cleanedPid, pidType.toLowerCase().trim());
 	}
 
 	public static String getJPathString(final String jsonPath, final String json) {

dhp-common/src/main/java/eu/dnetlib/dhp/utils/ISLookupClientFactory.java

@@ -18,13 +18,16 @@ public class ISLookupClientFactory {
 	private static final int requestTimeout = 60000 * 10;
 	private static final int connectTimeout = 60000 * 10;
 
+	private ISLookupClientFactory() {
+	}
+
 	public static ISLookUpService getLookUpService(final String isLookupUrl) {
 		return getServiceStub(ISLookUpService.class, isLookupUrl);
 	}
 
 	@SuppressWarnings("unchecked")
 	private static <T> T getServiceStub(final Class<T> clazz, final String endpoint) {
-		log.info(String.format("creating %s stub from %s", clazz.getName(), endpoint));
+		log.info("creating {} stub from {}", clazz.getName(), endpoint);
 		final JaxWsProxyFactoryBean jaxWsProxyFactory = new JaxWsProxyFactoryBean();
 		jaxWsProxyFactory.setServiceClass(clazz);
 		jaxWsProxyFactory.setAddress(endpoint);
@@ -38,12 +41,10 @@ public class ISLookupClientFactory {
 
 			log
 				.info(
-					String
-						.format(
-							"setting connectTimeout to %s, requestTimeout to %s for service %s",
+					"setting connectTimeout to {}, requestTimeout to {} for service {}",
 					connectTimeout,
 					requestTimeout,
-							clazz.getCanonicalName()));
+					clazz.getCanonicalName());
 
 			policy.setConnectionTimeout(connectTimeout);
 			policy.setReceiveTimeout(requestTimeout);

dhp-common/src/main/java/eu/dnetlib/dhp/utils/saxon/AbstractExtensionFunction.java

@@ -10,7 +10,7 @@ import net.sf.saxon.trans.XPathException;
 
 public abstract class AbstractExtensionFunction extends ExtensionFunctionDefinition {
 
-	public static String DEFAULT_SAXON_EXT_NS_URI = "http://www.d-net.research-infrastructures.eu/saxon-extension";
+	public static final String DEFAULT_SAXON_EXT_NS_URI = "http://www.d-net.research-infrastructures.eu/saxon-extension";
 
 	public abstract String getName();
 

dhp-common/src/main/java/eu/dnetlib/dhp/utils/saxon/ExtractYear.java

@@ -26,7 +26,7 @@ public class ExtractYear extends AbstractExtensionFunction {
 
 	@Override
 	public Sequence doCall(XPathContext context, Sequence[] arguments) throws XPathException {
-		if (arguments == null | arguments.length == 0) {
+		if (arguments == null || arguments.length == 0) {
 			return new StringValue("");
 		}
 		final Item item = arguments[0].head();
@@ -63,8 +63,7 @@ public class ExtractYear extends AbstractExtensionFunction {
 		for (String format : dateFormats) {
 			try {
 				c.setTime(new SimpleDateFormat(format).parse(s));
-				String year = String.valueOf(c.get(Calendar.YEAR));
-				return year;
+				return String.valueOf(c.get(Calendar.YEAR));
 			} catch (ParseException e) {
 			}
 		}

dhp-common/src/main/java/eu/dnetlib/dhp/utils/saxon/NormalizeDate.java

@@ -30,7 +30,7 @@ public class NormalizeDate extends AbstractExtensionFunction {
 
 	@Override
 	public Sequence doCall(XPathContext context, Sequence[] arguments) throws XPathException {
-		if (arguments == null | arguments.length == 0) {
+		if (arguments == null || arguments.length == 0) {
 			return new StringValue(BLANK);
 		}
 		String s = arguments[0].head().getStringValue();

dhp-common/src/main/java/eu/dnetlib/dhp/utils/saxon/PickFirst.java

@@ -1,6 +1,8 @@
 
 package eu.dnetlib.dhp.utils.saxon;
 
+import static org.apache.commons.lang3.StringUtils.isNotBlank;
+
 import org.apache.commons.lang3.StringUtils;
 
 import net.sf.saxon.expr.XPathContext;
@@ -26,7 +28,8 @@ public class PickFirst extends AbstractExtensionFunction {
 		final String s1 = getValue(arguments[0]);
 		final String s2 = getValue(arguments[1]);
 
-		return new StringValue(StringUtils.isNotBlank(s1) ? s1 : StringUtils.isNotBlank(s2) ? s2 : "");
+		final String value = isNotBlank(s1) ? s1 : isNotBlank(s2) ? s2 : "";
+		return new StringValue(value);
 	}
 
 	private String getValue(final Sequence arg) throws XPathException {

dhp-common/src/main/java/eu/dnetlib/dhp/utils/saxon/SaxonTransformerFactory.java

@@ -12,6 +12,9 @@ import net.sf.saxon.TransformerFactoryImpl;
 
 public class SaxonTransformerFactory {
 
+	private SaxonTransformerFactory() {
+	}
+
 	/**
 	 * Creates the index record transformer from the given XSLT
 	 *

dhp-common/src/main/java/eu/dnetlib/pace/common/PaceCommonUtils.java

@@ -0,0 +1,101 @@
+
+package eu.dnetlib.pace.common;
+
+import java.nio.charset.StandardCharsets;
+import java.text.Normalizer;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
+
+import com.google.common.base.Splitter;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Sets;
+import com.ibm.icu.text.Transliterator;
+
+/**
+ * Set of common functions for the framework
+ *
+ * @author claudio
+ */
+public class PaceCommonUtils {
+
+	// transliterator
+	protected static Transliterator transliterator = Transliterator.getInstance("Any-Eng");
+
+	protected static final String aliases_from = "⁰¹²³⁴⁵⁶⁷⁸⁹⁺⁻⁼⁽⁾ⁿ₀₁₂₃₄₅₆₇₈₉₊₋₌₍₎àáâäæãåāèéêëēėęəîïíīįìôöòóœøōõûüùúūßśšłžźżçćčñń";
+	protected static final String aliases_to = "0123456789+-=()n0123456789+-=()aaaaaaaaeeeeeeeeiiiiiioooooooouuuuussslzzzcccnn";
+
+	protected static Pattern hexUnicodePattern = Pattern.compile("\\\\u(\\p{XDigit}{4})");
+
+	protected static String fixAliases(final String s) {
+		final StringBuilder sb = new StringBuilder();
+
+		s.chars().forEach(ch -> {
+			final int i = StringUtils.indexOf(aliases_from, ch);
+			sb.append(i >= 0 ? aliases_to.charAt(i) : (char) ch);
+		});
+
+		return sb.toString();
+	}
+
+	protected static String transliterate(final String s) {
+		try {
+			return transliterator.transliterate(s);
+		} catch (Exception e) {
+			return s;
+		}
+	}
+
+	public static String normalize(final String s) {
+		return fixAliases(transliterate(nfd(unicodeNormalization(s))))
+			.toLowerCase()
+			// do not compact the regexes in a single expression, would cause StackOverflowError in case of large input
+			// strings
+			.replaceAll("[^ \\w]+", "")
+			.replaceAll("(\\p{InCombiningDiacriticalMarks})+", "")
+			.replaceAll("(\\p{Punct})+", " ")
+			.replaceAll("(\\d)+", " ")
+			.replaceAll("(\\n)+", " ")
+			.trim();
+	}
+
+	public static String nfd(final String s) {
+		return Normalizer.normalize(s, Normalizer.Form.NFD);
+	}
+
+	public static String unicodeNormalization(final String s) {
+
+		Matcher m = hexUnicodePattern.matcher(s);
+		StringBuffer buf = new StringBuffer(s.length());
+		while (m.find()) {
+			String ch = String.valueOf((char) Integer.parseInt(m.group(1), 16));
+			m.appendReplacement(buf, Matcher.quoteReplacement(ch));
+		}
+		m.appendTail(buf);
+		return buf.toString();
+	}
+
+	public static Set<String> loadFromClasspath(final String classpath) {
+
+		Transliterator transliterator = Transliterator.getInstance("Any-Eng");
+
+		final Set<String> h = Sets.newHashSet();
+		try {
+			for (final String s : IOUtils
+				.readLines(PaceCommonUtils.class.getResourceAsStream(classpath), StandardCharsets.UTF_8)) {
+				h.add(fixAliases(transliterator.transliterate(s))); // transliteration of the stopwords
+			}
+		} catch (final Throwable e) {
+			return Sets.newHashSet();
+		}
+		return h;
+	}
+
+	protected static Iterable<String> tokens(final String s, final int maxTokens) {
+		return Iterables.limit(Splitter.on(" ").omitEmptyStrings().trimResults().split(s), maxTokens);
+	}
+
+}

dhp-common/src/main/java/eu/dnetlib/pace/model/Person.java

@@ -0,0 +1,156 @@
+
+package eu.dnetlib.pace.model;
+
+import java.nio.charset.Charset;
+import java.text.Normalizer;
+import java.util.List;
+import java.util.Set;
+
+import com.google.common.base.Joiner;
+import com.google.common.base.Splitter;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Lists;
+import com.google.common.hash.Hashing;
+
+import eu.dnetlib.pace.common.PaceCommonUtils;
+import eu.dnetlib.pace.util.Capitalise;
+import eu.dnetlib.pace.util.DotAbbreviations;
+
+public class Person {
+
+	private static final String UTF8 = "UTF-8";
+	private List<String> name = Lists.newArrayList();
+	private List<String> surname = Lists.newArrayList();
+	private List<String> fullname = Lists.newArrayList();
+	private final String original;
+
+	private static Set<String> particles = null;
+
+	public Person(String s, final boolean aggressive) {
+		original = s;
+		s = Normalizer.normalize(s, Normalizer.Form.NFD);
+		s = s.replaceAll("\\(.+\\)", "");
+		s = s.replaceAll("\\[.+\\]", "");
+		s = s.replaceAll("\\{.+\\}", "");
+		s = s.replaceAll("\\s+-\\s+", "-");
+		s = s.replaceAll("[\\p{Punct}&&[^,-]]", " ");
+		s = s.replaceAll("\\d", " ");
+		s = s.replaceAll("\\n", " ");
+		s = s.replaceAll("\\.", " ");
+		s = s.replaceAll("\\s+", " ");
+
+		if (aggressive) {
+			s = s.replaceAll("[\\p{InCombiningDiacriticalMarks}&&[^,-]]", "");
+			// s = s.replaceAll("[\\W&&[^,-]]", "");
+		}
+
+		if (s.contains(",")) { // if the name contains a comma it is easy derivable the name and the surname
+			final String[] arr = s.split(",");
+			if (arr.length == 1) {
+				fullname = splitTerms(arr[0]);
+			} else if (arr.length > 1) {
+				surname = splitTerms(arr[0]);
+				name = splitTerms(arr[1]);
+				fullname.addAll(surname);
+				fullname.addAll(name);
+			}
+		} else {
+			fullname = splitTerms(s);
+
+			int lastInitialPosition = fullname.size();
+			boolean hasSurnameInUpperCase = false;
+
+			for (int i = 0; i < fullname.size(); i++) {
+				final String term = fullname.get(i);
+				if (term.length() == 1) {
+					lastInitialPosition = i;
+				} else if (term.equals(term.toUpperCase())) {
+					hasSurnameInUpperCase = true;
+				}
+			}
+
+			if (lastInitialPosition < (fullname.size() - 1)) { // Case: Michele G. Artini
+				name = fullname.subList(0, lastInitialPosition + 1);
+				surname = fullname.subList(lastInitialPosition + 1, fullname.size());
+			} else if (hasSurnameInUpperCase) { // Case: Michele ARTINI
+				for (final String term : fullname) {
+					if ((term.length() > 1) && term.equals(term.toUpperCase())) {
+						surname.add(term);
+					} else {
+						name.add(term);
+					}
+				}
+			}
+		}
+	}
+
+	private List<String> splitTerms(final String s) {
+		if (particles == null) {
+			particles = PaceCommonUtils.loadFromClasspath("/eu/dnetlib/pace/config/name_particles.txt");
+		}
+
+		final List<String> list = Lists.newArrayList();
+		for (final String part : Splitter.on(" ").omitEmptyStrings().split(s)) {
+			if (!particles.contains(part.toLowerCase())) {
+				list.add(part);
+			}
+		}
+		return list;
+	}
+
+	public List<String> getName() {
+		return name;
+	}
+
+	public String getNameString() {
+		return Joiner.on(" ").join(getName());
+	}
+
+	public List<String> getSurname() {
+		return surname;
+	}
+
+	public List<String> getFullname() {
+		return fullname;
+	}
+
+	public String getOriginal() {
+		return original;
+	}
+
+	public String hash() {
+		return Hashing.murmur3_128().hashString(getNormalisedFullname(), Charset.forName(UTF8)).toString();
+	}
+
+	public String getNormalisedFirstName() {
+		return Joiner.on(" ").join(getCapitalFirstnames());
+	}
+
+	public String getNormalisedSurname() {
+		return Joiner.on(" ").join(getCapitalSurname());
+	}
+
+	public String getSurnameString() {
+		return Joiner.on(" ").join(getSurname());
+	}
+
+	public String getNormalisedFullname() {
+		return isAccurate() ? getNormalisedSurname() + ", " + getNormalisedFirstName() : Joiner.on(" ").join(fullname);
+	}
+
+	public List<String> getCapitalFirstnames() {
+		return Lists.newArrayList(Iterables.transform(getNameWithAbbreviations(), new Capitalise()));
+	}
+
+	public List<String> getCapitalSurname() {
+		return Lists.newArrayList(Iterables.transform(surname, new Capitalise()));
+	}
+
+	public List<String> getNameWithAbbreviations() {
+		return Lists.newArrayList(Iterables.transform(name, new DotAbbreviations()));
+	}
+
+	public boolean isAccurate() {
+		return ((name != null) && (surname != null) && !name.isEmpty() && !surname.isEmpty());
+	}
+}

dhp-common/src/main/java/eu/dnetlib/pace/util/Capitalise.java

@@ -0,0 +1,18 @@
+
+package eu.dnetlib.pace.util;
+
+import org.apache.commons.lang3.text.WordUtils;
+
+import com.google.common.base.Function;
+
+public class Capitalise implements Function<String, String> {
+
+	private final char[] DELIM = {
+		' ', '-'
+	};
+
+	@Override
+	public String apply(final String s) {
+		return WordUtils.capitalize(s.toLowerCase(), DELIM);
+	}
+}

dhp-common/src/main/java/eu/dnetlib/pace/util/DotAbbreviations.java

@@ -0,0 +1,11 @@
+
+package eu.dnetlib.pace.util;
+
+import com.google.common.base.Function;
+
+public class DotAbbreviations implements Function<String, String> {
+	@Override
+	public String apply(String s) {
+		return s.length() == 1 ? s + "." : s;
+	}
+}

dhp-common/src/main/resources/eu/dnetlib/dhp/common/name_particles.txt

@@ -0,0 +1,8 @@
+van
+von
+der
+de
+dell
+sig
+mr
+mrs

dhp-common/src/main/resources/eu/dnetlib/dhp/oa/merge/group_graph_entities_parameters.json

@@ -0,0 +1,38 @@
+[
+  {
+    "paramName": "issm",
+    "paramLongName": "isSparkSessionManaged",
+    "paramDescription": "when true will stop SparkSession after job execution",
+    "paramRequired": false
+  },
+  {
+    "paramName": "gin",
+    "paramLongName": "graphInputPath",
+    "paramDescription": "the input graph root path",
+    "paramRequired": true
+  },
+  {
+    "paramName": "cp",
+    "paramLongName": "checkpointPath",
+    "paramDescription": "checkpoint directory",
+    "paramRequired": true
+  },
+  {
+    "paramName": "out",
+    "paramLongName": "outputPath",
+    "paramDescription": "the output graph root path",
+    "paramRequired": true
+  },
+  {
+    "paramName": "fi",
+    "paramLongName": "filterInvisible",
+    "paramDescription": "if true filters out invisible entities",
+    "paramRequired": true
+  },
+  {
+    "paramName": "isu",
+    "paramLongName": "isLookupUrl",
+    "paramDescription": "url to the ISLookup Service",
+    "paramRequired": true
+  }
+]

dhp-common/src/main/resources/eu/dnetlib/dhp/oozie/run_sql_parameters.json

@@ -0,0 +1,20 @@
+[
+  {
+    "paramName": "issm",
+    "paramLongName": "isSparkSessionManaged",
+    "paramDescription": "when true will stop SparkSession after job execution",
+    "paramRequired": false
+  },
+  {
+    "paramName": "hmu",
+    "paramLongName": "hiveMetastoreUris",
+    "paramDescription": "the hive metastore uris",
+    "paramRequired": true
+  },
+  {
+    "paramName": "sql",
+    "paramLongName": "sql",
+    "paramDescription": "sql script to execute",
+    "paramRequired": true
+  }
+]

dhp-common/src/main/resources/eu/dnetlib/scholexplorer/relation/relations.json

@@ -154,5 +154,13 @@
   "unknown":{
     "original":"Unknown",
     "inverse":"Unknown"
+  },
+  "isamongtopnsimilardocuments": {
+    "original": "IsAmongTopNSimilarDocuments",
+    "inverse": "HasAmongTopNSimilarDocuments"
+  },
+  "hasamongtopnsimilardocuments": {
+    "original": "HasAmongTopNSimilarDocuments",
+    "inverse": "IsAmongTopNSimilarDocuments"
   }
 }

dhp-common/src/main/scala/eu/dnetlib/dhp/application/SparkScalaApplication.scala

@@ -0,0 +1,86 @@
+package eu.dnetlib.dhp.application
+
+import eu.dnetlib.dhp.common.Constants
+import eu.dnetlib.dhp.utils.DHPUtils.writeHdfsFile
+
+import scala.io.Source
+
+/** This is the main Interface SparkApplication
+  * where all the Spark Scala class should inherit
+  */
+trait SparkScalaApplication {
+
+  /** This is the path in the classpath of the json
+    * describes all the argument needed to run
+    */
+  val propertyPath: String
+
+  /** Utility to parse the arguments using the
+    * property json in the classpath identified from
+    * the variable propertyPath
+    *
+    * @param args the list of arguments
+    */
+  def parseArguments(args: Array[String]): ArgumentApplicationParser = {
+    val parser = new ArgumentApplicationParser(
+      Source.fromInputStream(getClass.getResourceAsStream(propertyPath)).mkString
+    )
+    parser.parseArgument(args)
+    parser
+  }
+
+  /** Here all the spark applications runs this method
+    * where the whole logic of the spark node is defined
+    */
+  def run(): Unit
+}
+
+import org.apache.spark.SparkConf
+import org.apache.spark.sql.SparkSession
+import org.slf4j.Logger
+
+abstract class AbstractScalaApplication(
+  val propertyPath: String,
+  val args: Array[String],
+  log: Logger
+) extends SparkScalaApplication {
+
+  var parser: ArgumentApplicationParser = null
+
+  var spark: SparkSession = null
+
+  def initialize(): SparkScalaApplication = {
+    parser = parseArguments(args)
+    spark = createSparkSession()
+    this
+  }
+
+  /** Utility for creating a spark session starting from parser
+    *
+    * @return a spark Session
+    */
+  private def createSparkSession(): SparkSession = {
+    require(parser != null)
+
+    val conf: SparkConf = new SparkConf()
+    val master = parser.get("master")
+    log.info(s"Creating Spark session: Master: $master")
+    val b = SparkSession
+      .builder()
+      .config(conf)
+      .appName(getClass.getSimpleName)
+    if (master != null)
+      b.master(master)
+    b.getOrCreate()
+  }
+
+  def reportTotalSize(targetPath: String, outputBasePath: String): Unit = {
+    val total_items = spark.read.text(targetPath).count()
+    writeHdfsFile(
+      spark.sparkContext.hadoopConfiguration,
+      s"$total_items",
+      outputBasePath + Constants.MDSTORE_SIZE_PATH
+    )
+  }
+
+}

dhp-common/src/main/scala/eu/dnetlib/dhp/application/dedup/log/DedupLogModel.scala

@@ -0,0 +1,10 @@
+package eu.dnetlib.dhp.application.dedup.log
+
+case class DedupLogModel(
+  tag: String,
+  configuration: String,
+  entity: String,
+  startTS: Long,
+  endTS: Long,
+  totalMs: Long
+) {}

dhp-common/src/main/scala/eu/dnetlib/dhp/application/dedup/log/DedupLogWriter.scala

@@ -0,0 +1,14 @@
+package eu.dnetlib.dhp.application.dedup.log
+
+import org.apache.spark.sql.{SaveMode, SparkSession}
+
+class DedupLogWriter(path: String) {
+
+  def appendLog(dedupLogModel: DedupLogModel, spark: SparkSession): Unit = {
+    import spark.implicits._
+    val df = spark.createDataset[DedupLogModel](data = List(dedupLogModel))
+    df.write.mode(SaveMode.Append).save(path)
+
+  }
+
+}