diff --git a/dhp-build/dhp-build-assembly-resources/pom.xml b/dhp-build/dhp-build-assembly-resources/pom.xml
index 92a939d195..327c33d6f2 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>1.2.1-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 551f041542..873046e080 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>1.2.1-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 4bf8ef4b6f..8099a72e4e 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>1.2.1-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
diff --git a/dhp-build/pom.xml b/dhp-build/pom.xml
index 44c0763d63..a700a29187 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>1.2.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>dhp-build</artifactId>
 	<packaging>pom</packaging>
diff --git a/dhp-common/pom.xml b/dhp-common/pom.xml
index 388998b945..c1d6e1b5bb 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>1.2.1-SNAPSHOT</version>
 		<relativePath>../</relativePath>
 	</parent>
 
diff --git a/dhp-schemas/pom.xml b/dhp-schemas/pom.xml
index fab26b3848..fe5d0c431a 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>1.2.1-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 ad5e9cebef..c928992aa3 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 2327b97e26..22a81f7da8 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>1.2.1-SNAPSHOT</version>
     </parent>
     <artifactId>dhp-actionmanager</artifactId>
 
diff --git a/dhp-workflows/dhp-aggregation/pom.xml b/dhp-workflows/dhp-aggregation/pom.xml
index 19237a5a81..1c5465c14a 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>1.2.1-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 c94c79f2cb..8b7ec38511 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>1.2.1-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 de39401b97..fcc356ac08 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>1.2.1-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 7d2d47eac0..8dd00be979 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
@@ -423,7 +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
diff --git a/dhp-workflows/dhp-dedup-scholexplorer/pom.xml b/dhp-workflows/dhp-dedup-scholexplorer/pom.xml
index 38f630451e..dff376c2d2 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>1.2.1-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 456e4dfa39..c13bec8e6d 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>1.2.1-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 9c407d2319..62968c4107 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>1.2.1-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 65218318a7..e0ee03660b 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>1.2.1-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 291082df71..39699b3b67 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>1.2.1-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 29015f9204..06408937bc 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>1.2.1-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 b305b5b8c3..5f99cdc8d3 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>1.2.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/dhp-workflows/pom.xml b/dhp-workflows/pom.xml
index 09c24004a2..ff392aa6f5 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>1.2.1-SNAPSHOT</version>
         <relativePath>../</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 2071519060..419de3540d 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>1.2.1-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<licenses>