diff --git a/src/main/java/org/gcube/data/publishing/ckan2zenodo/Translator.java b/src/main/java/org/gcube/data/publishing/ckan2zenodo/Translator.java
index f94acd5..189ed83 100644
--- a/src/main/java/org/gcube/data/publishing/ckan2zenodo/Translator.java
+++ b/src/main/java/org/gcube/data/publishing/ckan2zenodo/Translator.java
@@ -12,8 +12,9 @@ import org.gcube.data.publishing.ckan2zenodo.model.CkanItemDescriptor;
 import org.gcube.data.publishing.ckan2zenodo.model.CkanResource;
 import org.gcube.data.publishing.ckan2zenodo.model.faults.TransformationException;
 import org.gcube.data.publishing.ckan2zenodo.model.parsing.Mapping;
-import org.gcube.data.publishing.ckan2zenodo.model.parsing.ResourceFilter;
 import org.gcube.data.publishing.ckan2zenodo.model.parsing.Mapping.Regexp;
+import org.gcube.data.publishing.ckan2zenodo.model.parsing.Mapping.Source.Value;
+import org.gcube.data.publishing.ckan2zenodo.model.parsing.ResourceFilter;
 import org.gcube.data.publishing.ckan2zenodo.model.parsing.ResourceFilter.Filter;
 import org.gcube.data.publishing.ckan2zenodo.model.zenodo.Contributor;
 import org.gcube.data.publishing.ckan2zenodo.model.zenodo.DepositionMetadata;
@@ -121,17 +122,28 @@ public class Translator {
 				try {
 					// extract source
 					List<String> sourceValues=new ArrayList<>();
-					switch(mapping.getSource().getType()) {
-					case constant : {
-						sourceValues.add(mapping.getSource().getValue());
-						break;
+					
+					for(Value v: mapping.getSource().getValues()) {
+					
+						switch(v.getType()) {
+						case constant : {
+							sourceValues.add(v.getValue());
+							break;
+						}
+						case jsonPath : {
+							sourceValues.addAll(sourceCtx.read(v.getValue()));
+							break;
+						}
+						}
+						
+						if(!sourceValues.isEmpty()) break;
+						
 					}
-					case jsonPath : {
-						sourceValues.addAll(sourceCtx.read(mapping.getSource().getValue()));
-						break;
-					}
-					}
-
+					
+					
+					
+					
+					
 					for(String sourceValue:sourceValues) {
 						String resultingValue=sourceValue;
 
diff --git a/src/main/java/org/gcube/data/publishing/ckan2zenodo/commons/IS.java b/src/main/java/org/gcube/data/publishing/ckan2zenodo/commons/IS.java
index 9e1d572..eef4034 100644
--- a/src/main/java/org/gcube/data/publishing/ckan2zenodo/commons/IS.java
+++ b/src/main/java/org/gcube/data/publishing/ckan2zenodo/commons/IS.java
@@ -11,9 +11,10 @@ import org.gcube.common.resources.gcore.GenericResource;
 import org.gcube.common.resources.gcore.ServiceEndpoint;
 import org.gcube.data.publishing.ckan2zenodo.model.faults.ConfigurationException;
 import org.gcube.data.publishing.ckan2zenodo.model.parsing.Mapping;
-import org.gcube.data.publishing.ckan2zenodo.model.parsing.ResourceFilter;
 import org.gcube.data.publishing.ckan2zenodo.model.parsing.Mapping.Regexp;
 import org.gcube.data.publishing.ckan2zenodo.model.parsing.Mapping.Source;
+import org.gcube.data.publishing.ckan2zenodo.model.parsing.Mapping.Source.Value;
+import org.gcube.data.publishing.ckan2zenodo.model.parsing.ResourceFilter;
 import org.gcube.resources.discovery.client.api.DiscoveryClient;
 import org.gcube.resources.discovery.client.queries.api.SimpleQuery;
 import org.w3c.dom.Element;
@@ -61,8 +62,13 @@ public class IS {
 			for(int i = 0; i<mappings.getLength();i++) {
 				Element mapping=(Element) mappings.item(i);
 				Element sourceElement=(Element) mapping.getElementsByTagName("source").item(0);
-				Source source=new Source(Source.Type.valueOf(sourceElement.getAttribute("type")),
-						sourceElement.getElementsByTagName("value").item(0).getTextContent());
+				NodeList valuesNodeList=sourceElement.getElementsByTagName("value");
+				Source source=new Source();
+				for(int j=0;j<valuesNodeList.getLength();j++) {
+					Element valueElement=(Element) valuesNodeList.item(j);
+					source.getValues().add(new Value(Value.Type.valueOf(valueElement.getAttribute("type")),
+							valueElement.getTextContent()));
+				}
 				
 				
 				String targetPath=mapping.getElementsByTagName("targetPath").item(0).getTextContent();
diff --git a/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanItemDescriptor.java b/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanItemDescriptor.java
index 19344c9..dec8824 100644
--- a/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanItemDescriptor.java
+++ b/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanItemDescriptor.java
@@ -13,10 +13,12 @@ import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
+import lombok.ToString;
 import net.minidev.json.JSONObject;
 
 @RequiredArgsConstructor
 @NoArgsConstructor
+@ToString
 public class CkanItemDescriptor {
 
 	static private ObjectMapper mapper;
diff --git a/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanRelatedIdentifier.java b/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanRelatedIdentifier.java
index 0dc12f2..d612468 100644
--- a/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanRelatedIdentifier.java
+++ b/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/CkanRelatedIdentifier.java
@@ -7,7 +7,7 @@ import lombok.RequiredArgsConstructor;
 import lombok.ToString;
 
 @Getter
-@RequiredArgsConstructor
+//@RequiredArgsConstructor
 @NoArgsConstructor
 @ToString
 public class CkanRelatedIdentifier {
@@ -16,14 +16,23 @@ public class CkanRelatedIdentifier {
 		return new CkanRelatedIdentifier("URL", "isReferencedBy", doi);
 	}
 	
-	@NonNull
+//	@NonNull
 	private String relatedIdentifierType;
-	@NonNull
+//	@NonNull
 	private String relationType;
-	@NonNull
+//	@NonNull
 	private String link;
 	
 	public Integer getZenodoId() {
 		return Integer.parseInt(link.substring(link.lastIndexOf(".")+1));
 	}
+
+	public CkanRelatedIdentifier(String relatedIdentifierType, String relationType, String link) {
+		super();
+		this.relatedIdentifierType = relatedIdentifierType;
+		this.relationType = relationType;
+		this.link = link;
+	}
+	
+	
 }
diff --git a/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/parsing/Mapping.java b/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/parsing/Mapping.java
index 2f6e083..d1c5302 100644
--- a/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/parsing/Mapping.java
+++ b/src/main/java/org/gcube/data/publishing/ckan2zenodo/model/parsing/Mapping.java
@@ -1,5 +1,6 @@
 package org.gcube.data.publishing.ckan2zenodo.model.parsing;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 
@@ -28,17 +29,24 @@ public class Mapping {
 		@Setter
 		private String replacement;
 	}
-	@RequiredArgsConstructor
+	
 	@Getter
 	@ToString
 	public static class Source{
-		public static enum Type{
-			jsonPath,constant
+		
+		@RequiredArgsConstructor
+		@Getter
+		@ToString
+		public static class Value{
+			public static enum Type{
+				jsonPath,constant
+			}
+			@NonNull
+			private Type type;
+			@NonNull
+			private String value;			
 		}
-		@NonNull
-		private Type type;
-		@NonNull
-		private String value;
+		private List<Value> values=new ArrayList<>();
 	}
 	
 	@NonNull
diff --git a/src/test/java/org/gcube/tests/ParsingTests.java b/src/test/java/org/gcube/tests/ParsingTests.java
index a672ffd..628dd6c 100644
--- a/src/test/java/org/gcube/tests/ParsingTests.java
+++ b/src/test/java/org/gcube/tests/ParsingTests.java
@@ -142,9 +142,46 @@ public class ParsingTests {
 		String json=TestCommons.convertStreamToString(TransformationTests.class.getResourceAsStream("/ResearchObject.json"));		
 		CkanItemDescriptor desc=new CkanItemDescriptor(json);
 		Assert.assertNull(desc.getZenodoDoi());
-		desc.setZenodoDoi(new CkanRelatedIdentifier("URL", "isReferencedBy", "http://some.dumb.link.com"));
+		desc.setZenodoDoi(new CkanRelatedIdentifier("URL", "isReferencedBy", "http://10.5281/zenodo.1000001"));
 		CkanRelatedIdentifier id=desc.getZenodoDoi();
 		Assert.assertNotNull(id);
 		System.out.println(desc.getContent());
 	}
+	
+	@Test
+	public void guiTest() throws JsonParseException, JsonMappingException, IOException {
+		String toParse="{\n" + 
+				"    \"metadata\":\n" + 
+				"    {\n" + 
+				"        \"title\": \"Crop Parameters\",\n" + 
+				"        \"description\": \"Parameter definitions for various crops. Can be used as input for a crop \\r\\nsimulation model, such as WOFOST.\",\n" + 
+				"        \"access_right\": \"open\",\n" + 
+				"        \"license\": \"AFL-3.0\",\n" + 
+				"        \"keywords\": [\"crop parameters\", \"crop simulation\", \"input files\", \"wofost\"],\n" + 
+				"        \"related_identifiers\": [\n" + 
+				"        {\n" + 
+				"            \"identifier\": \"http://data.d4science.org/ctlg/AgroClimaticModelling/crop_parameters\",\n" + 
+				"            \"relation\": \"compiles\"\n" + 
+				"        }],\n" + 
+				"        \"contributors\": [\n" + 
+				"        {\n" + 
+				"            \"type\": \"Producer\",\n" + 
+				"            \"name\": \"Knapen Rob\"\n" + 
+				"        },\n" + 
+				"        {\n" + 
+				"            \"type\": \"DataCurator\",\n" + 
+				"            \"name\": \"Knapen Rob\"\n" + 
+				"        }],\n" + 
+				"        \"version\": \"1\",\n" + 
+				"        \"upload_type\": \"dataset\",\n" + 
+				"        \"creators\": [\n" + 
+				"        {\n" + 
+				"            \"name\": \"Knapen Rob\",\n" + 
+				"            \"type\": \"Producer\"\n" + 
+				"        }]\n" + 
+				"    }\n" + 
+				"}";
+		ZenodoDeposition dep=Parsing.getMapper().readValue(toParse,ZenodoDeposition.class);
+		System.out.println(dep);
+	}
 }
diff --git a/src/test/java/org/gcube/tests/TransformationTests.java b/src/test/java/org/gcube/tests/TransformationTests.java
index b34eac6..61f40fb 100644
--- a/src/test/java/org/gcube/tests/TransformationTests.java
+++ b/src/test/java/org/gcube/tests/TransformationTests.java
@@ -24,16 +24,17 @@ public class TransformationTests {
 		Translator basic=new Translator();
 		TestCommons.readAndTransform("/simpleItem.json",basic);
 		TestCommons.readAndTransform("/FSKXModel.json",basic);
-		TestCommons.readAndTransform("/ResearchObject.json",basic);
-		
+		TestCommons.readAndTransform("/ResearchObject.json",basic);		
 	}
 	
 	
 	@Test
 	public void transformWithMappings() throws Exception {
-		GenericResource res=Resources.unmarshal(GenericResource.class, TransformationTests.class.getResourceAsStream("/ResearchObject.xml"));
-		TestCommons.readAndTransform("/ResearchObject.json", new Translator(IS.readMappings(res)));
 		
+		GenericResource res=Resources.unmarshal(GenericResource.class, TransformationTests.class.getResourceAsStream("/ResearchObject.xml"));
+		Translator t=new Translator(IS.readMappings(res));
+//		TestCommons.readAndTransform("/ResearchObject.json", t);
+		TestCommons.readAndTransform("/crop_parameters.json",t);
 	}	
 	
 	
diff --git a/src/test/resources/ResearchObject.xml b/src/test/resources/ResearchObject.xml
index 3e1c9d2..3296462 100644
--- a/src/test/resources/ResearchObject.xml
+++ b/src/test/resources/ResearchObject.xml
@@ -17,8 +17,8 @@
 			<mappings>
 			
 				<mapping>
-					<source type="constant">
-						<value>dataset</value>						
+					<source>
+						<value type="constant">dataset</value>						
 					</source>					
 					<targetPath>$.metadata</targetPath>
 					<targetElement>upload_type</targetElement>
@@ -26,22 +26,23 @@
 			
 			
 				<mapping>
-					<source type="jsonPath">
-						<value>$.extras[?(@.key=='Author')].value</value>
+					<source>
+						<value type="jsonPath">$.extras[?(@.key=='Author')].value</value>
+						<value type="jsonPath">$.author</value>						
 					</source>
 					<targetPath>$.metadata.creators[0]</targetPath>
 					<targetElement>name</targetElement>
-					<regexp type="extract">
+					<!-- <regexp type="extract">
 						<target>([A-Za-z]*, [A-Za-z]*)(?=,)</target>
-					</regexp>
+					</regexp> -->
 				</mapping>
-				<mapping>
-					<source type="constant">
-						<value>Producer</value>
+				<!--  <mapping>
+					<source>
+						<value type="constant">Producer</value>
 					</source>
 					<targetPath>$.metadata.creators[0]</targetPath>
 					<targetElement>type</targetElement>					
-				</mapping>
+				</mapping> -->
 				<!-- <mapping>
 					 <source type="jsonPath">
 						<value>$.extras[?(@.key=='Author')].value</value>