diff --git a/dhp-build/dhp-build-assembly-resources/pom.xml b/dhp-build/dhp-build-assembly-resources/pom.xml
index 92a939d19..e35e1d515 100644
--- a/dhp-build/dhp-build-assembly-resources/pom.xml
+++ b/dhp-build/dhp-build-assembly-resources/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp-build</artifactId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>dhp-build-assembly-resources</artifactId>
diff --git a/dhp-build/dhp-build-properties-maven-plugin/pom.xml b/dhp-build/dhp-build-properties-maven-plugin/pom.xml
index 551f04154..e16184c27 100644
--- a/dhp-build/dhp-build-properties-maven-plugin/pom.xml
+++ b/dhp-build/dhp-build-properties-maven-plugin/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp-build</artifactId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>dhp-build-properties-maven-plugin</artifactId>
diff --git a/dhp-build/dhp-code-style/pom.xml b/dhp-build/dhp-code-style/pom.xml
index 4bf8ef4b6..72ccbba3c 100644
--- a/dhp-build/dhp-code-style/pom.xml
+++ b/dhp-build/dhp-code-style/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>eu.dnetlib.dhp</groupId>
     <artifactId>dhp-code-style</artifactId>
-    <version>1.1.8-SNAPSHOT</version>
+    <version>1.2.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
diff --git a/dhp-build/pom.xml b/dhp-build/pom.xml
index 44c0763d6..df9bafabd 100644
--- a/dhp-build/pom.xml
+++ b/dhp-build/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>eu.dnetlib.dhp</groupId>
 		<artifactId>dhp</artifactId>
-		<version>1.1.8-SNAPSHOT</version>
+		<version>1.2.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>dhp-build</artifactId>
 	<packaging>pom</packaging>
diff --git a/dhp-common/pom.xml b/dhp-common/pom.xml
index 388998b94..46f8c575c 100644
--- a/dhp-common/pom.xml
+++ b/dhp-common/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>eu.dnetlib.dhp</groupId>
 		<artifactId>dhp</artifactId>
-		<version>1.1.8-SNAPSHOT</version>
+		<version>1.2.0-SNAPSHOT</version>
 		<relativePath>../</relativePath>
 	</parent>
 
diff --git a/dhp-schemas/pom.xml b/dhp-schemas/pom.xml
index fab26b384..343518a51 100644
--- a/dhp-schemas/pom.xml
+++ b/dhp-schemas/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp</artifactId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
         <relativePath>../</relativePath>
     </parent>
 
diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/oaf/Relation.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/oaf/Relation.java
index ad5e9cebe..c928992aa 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/oaf/Relation.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/oaf/Relation.java
@@ -41,6 +41,12 @@ public class Relation extends Oaf {
 	 */
 	private String target;
 
+	/**
+	 * List of relation specific properties. Values include 'similarityLevel', indicating the similarity score between a
+	 * pair of publications.
+	 */
+	private List<KeyValue> properties = new ArrayList<>();
+
 	public String getRelType() {
 		return relType;
 	}
@@ -81,6 +87,14 @@ public class Relation extends Oaf {
 		this.target = target;
 	}
 
+	public List<KeyValue> getProperties() {
+		return properties;
+	}
+
+	public void setProperties(List<KeyValue> properties) {
+		this.properties = properties;
+	}
+
 	public void mergeFrom(final Relation r) {
 
 		checkArgument(Objects.equals(getSource(), r.getSource()), "source ids must be equal");
diff --git a/dhp-workflows/dhp-actionmanager/pom.xml b/dhp-workflows/dhp-actionmanager/pom.xml
index 2327b97e2..52eb31b3d 100644
--- a/dhp-workflows/dhp-actionmanager/pom.xml
+++ b/dhp-workflows/dhp-actionmanager/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp-workflows</artifactId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <artifactId>dhp-actionmanager</artifactId>
 
diff --git a/dhp-workflows/dhp-aggregation/pom.xml b/dhp-workflows/dhp-aggregation/pom.xml
index 19237a5a8..2e3904055 100644
--- a/dhp-workflows/dhp-aggregation/pom.xml
+++ b/dhp-workflows/dhp-aggregation/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp-workflows</artifactId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <artifactId>dhp-aggregation</artifactId>
     
diff --git a/dhp-workflows/dhp-broker-events/pom.xml b/dhp-workflows/dhp-broker-events/pom.xml
index c94c79f2c..586de5bbc 100644
--- a/dhp-workflows/dhp-broker-events/pom.xml
+++ b/dhp-workflows/dhp-broker-events/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/dhp-dedup-openaire/pom.xml b/dhp-workflows/dhp-dedup-openaire/pom.xml
index de39401b9..2bf7b64d6 100644
--- a/dhp-workflows/dhp-dedup-openaire/pom.xml
+++ b/dhp-workflows/dhp-dedup-openaire/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>dhp-dedup-openaire</artifactId>
diff --git a/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java b/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
index 232176289..8dd00be97 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
+++ b/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
@@ -12,7 +12,6 @@ import java.io.Serializable;
 import java.net.URISyntaxException;
 import java.nio.file.Paths;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
 import org.apache.spark.SparkConf;
@@ -31,6 +30,8 @@ import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mockito.junit.jupiter.MockitoExtension;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 import eu.dnetlib.dhp.application.ArgumentApplicationParser;
 import eu.dnetlib.dhp.schema.oaf.Relation;
 import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
@@ -422,7 +423,7 @@ public class SparkDedupTest implements Serializable {
 
 		long relations = jsc.textFile(testDedupGraphBasePath + "/relation").count();
 
-		assertEquals(5022, relations);
+		assertEquals(4975, relations);
 
 		// check deletedbyinference
 		final Dataset<Relation> mergeRels = spark
@@ -460,9 +461,12 @@ public class SparkDedupTest implements Serializable {
 	}
 
 	private void testUniqueness(String path, int expected_total, int expected_unique) {
-		Dataset<Relation> rel = spark.read()
-				.textFile(getClass().getResource(path).getPath())
-				.map((MapFunction<String, Relation>) s -> new ObjectMapper().readValue(s, Relation.class), Encoders.bean(Relation.class));
+		Dataset<Relation> rel = spark
+			.read()
+			.textFile(getClass().getResource(path).getPath())
+			.map(
+				(MapFunction<String, Relation>) s -> new ObjectMapper().readValue(s, Relation.class),
+				Encoders.bean(Relation.class));
 
 		assertEquals(expected_total, rel.count());
 		assertEquals(expected_unique, rel.distinct().count());
diff --git a/dhp-workflows/dhp-dedup-scholexplorer/pom.xml b/dhp-workflows/dhp-dedup-scholexplorer/pom.xml
index 38f630451..395f39e8c 100644
--- a/dhp-workflows/dhp-dedup-scholexplorer/pom.xml
+++ b/dhp-workflows/dhp-dedup-scholexplorer/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/dhp-distcp/pom.xml b/dhp-workflows/dhp-distcp/pom.xml
index 456e4dfa3..572667949 100644
--- a/dhp-workflows/dhp-distcp/pom.xml
+++ b/dhp-workflows/dhp-distcp/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/dhp-graph-mapper/pom.xml b/dhp-workflows/dhp-graph-mapper/pom.xml
index 9c407d231..f7984528e 100644
--- a/dhp-workflows/dhp-graph-mapper/pom.xml
+++ b/dhp-workflows/dhp-graph-mapper/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/dhp-graph-provision-scholexplorer/pom.xml b/dhp-workflows/dhp-graph-provision-scholexplorer/pom.xml
index 65218318a..c202c66f7 100644
--- a/dhp-workflows/dhp-graph-provision-scholexplorer/pom.xml
+++ b/dhp-workflows/dhp-graph-provision-scholexplorer/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/dhp-graph-provision/pom.xml b/dhp-workflows/dhp-graph-provision/pom.xml
index 291082df7..9b3aa2fc4 100644
--- a/dhp-workflows/dhp-graph-provision/pom.xml
+++ b/dhp-workflows/dhp-graph-provision/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/dhp-stats-update/pom.xml b/dhp-workflows/dhp-stats-update/pom.xml
index 29015f920..6a3fa8f1d 100644
--- a/dhp-workflows/dhp-stats-update/pom.xml
+++ b/dhp-workflows/dhp-stats-update/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>dhp-stats-update</artifactId>
diff --git a/dhp-workflows/dhp-worfklow-profiles/pom.xml b/dhp-workflows/dhp-worfklow-profiles/pom.xml
index b305b5b8c..c51b6a502 100644
--- a/dhp-workflows/dhp-worfklow-profiles/pom.xml
+++ b/dhp-workflows/dhp-worfklow-profiles/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>dhp-workflows</artifactId>
         <groupId>eu.dnetlib.dhp</groupId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/pom.xml b/dhp-workflows/pom.xml
index 54352352d..45f1645d1 100644
--- a/dhp-workflows/pom.xml
+++ b/dhp-workflows/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>eu.dnetlib.dhp</groupId>
         <artifactId>dhp</artifactId>
-        <version>1.1.8-SNAPSHOT</version>
+        <version>1.2.0-SNAPSHOT</version>
         <relativePath>../</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 207151906..3c5263bb1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>eu.dnetlib.dhp</groupId>
 	<artifactId>dhp</artifactId>
-	<version>1.1.8-SNAPSHOT</version>
+	<version>1.2.0-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<licenses>