diff --git a/dhp-workflows/dhp-graph-mapper/src/main/scala/eu/dnetlib/dhp/sx/graph/SparkConvertRDDtoDataset.scala b/dhp-workflows/dhp-graph-mapper/src/main/scala/eu/dnetlib/dhp/sx/graph/SparkConvertRDDtoDataset.scala
index 0073afff5..a54acf1d3 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/scala/eu/dnetlib/dhp/sx/graph/SparkConvertRDDtoDataset.scala
+++ b/dhp-workflows/dhp-graph-mapper/src/main/scala/eu/dnetlib/dhp/sx/graph/SparkConvertRDDtoDataset.scala
@@ -2,6 +2,7 @@ package eu.dnetlib.dhp.sx.graph
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import eu.dnetlib.dhp.application.ArgumentApplicationParser
+import eu.dnetlib.dhp.schema.common.ModelConstants
 import eu.dnetlib.dhp.schema.oaf.{OtherResearchProduct, Publication, Relation, Result, Software, Dataset => OafDataset}
 import org.apache.commons.io.IOUtils
 import org.apache.commons.lang3.StringUtils
@@ -99,44 +100,32 @@ object SparkConvertRDDtoDataset {
 
     log.info("Converting Relation")
 
-    if (filterRelation != null && StringUtils.isNoneBlank(filterRelation)) {
+    val relationSemanticFilter = List(
+      ModelConstants.MERGES,
+      ModelConstants.IS_MERGED_IN,
+      ModelConstants.HAS_AMONG_TOP_N_SIMILAR_DOCS,
+      ModelConstants.IS_AMONG_TOP_N_SIMILAR_DOCS
+    )
 
-      val rddRelation = spark.sparkContext
-        .textFile(s"$sourcePath/relation")
-        .map(s => mapper.readValue(s, classOf[Relation]))
-        .filter(r => r.getDataInfo != null && r.getDataInfo.getDeletedbyinference == false)
-        .filter(r => r.getSource.startsWith("50") && r.getTarget.startsWith("50"))
-        //filter OpenCitations relations
-        .filter(r =>
-          r.getCollectedfrom != null && r.getCollectedfrom.size() > 0 && !r.getCollectedfrom.asScala.exists(k =>
-            "opencitations".equalsIgnoreCase(k.getValue)
-          )
-        )
-        .filter(r => r.getSubRelType != null && r.getSubRelType.equalsIgnoreCase(filterRelation))
-      spark.createDataset(rddRelation).as[Relation].write.mode(SaveMode.Overwrite).save(s"$relPath")
-    } else {
-
-      val relationSemanticFilter = List(
-        "merges",
-        "ismergedin",
-        "HasAmongTopNSimilarDocuments",
-        "IsAmongTopNSimilarDocuments"
+    val rddRelation = spark.sparkContext
+      .textFile(s"$sourcePath/relation")
+      .map(s => mapper.readValue(s, classOf[Relation]))
+      .filter(r => r.getDataInfo != null && r.getDataInfo.getDeletedbyinference == false)
+      .filter(r => r.getSource.startsWith("50") && r.getTarget.startsWith("50"))
+      //filter OpenCitations relations
+      .filter(r =>
+        r.getDataInfo.getProvenanceaction != null &&
+        !"sysimport:crosswalk:opencitations".equals(r.getDataInfo.getProvenanceaction.getClassid)
       )
+      .filter(r => filterRelations(filterRelation, relationSemanticFilter, r))
+    spark.createDataset(rddRelation).as[Relation].write.mode(SaveMode.Overwrite).save(s"$relPath")
+  }
 
-      val rddRelation = spark.sparkContext
-        .textFile(s"$sourcePath/relation")
-        .map(s => mapper.readValue(s, classOf[Relation]))
-        .filter(r => r.getDataInfo != null && r.getDataInfo.getDeletedbyinference == false)
-        .filter(r => r.getSource.startsWith("50") && r.getTarget.startsWith("50"))
-        //filter OpenCitations relations
-        .filter(r =>
-          r.getCollectedfrom != null && r.getCollectedfrom.size() > 0 && !r.getCollectedfrom.asScala.exists(k =>
-            "opencitations".equalsIgnoreCase(k.getValue)
-          )
-        )
-        .filter(r => !relationSemanticFilter.exists(k => k.equalsIgnoreCase(r.getRelClass)))
-      spark.createDataset(rddRelation).as[Relation].write.mode(SaveMode.Overwrite).save(s"$relPath")
+  private def filterRelations(filterRelation: String, relationSemanticFilter: List[String], r: Relation): Boolean = {
+    if (filterRelation != null && StringUtils.isNoneBlank(filterRelation)) {
+      r.getSubRelType != null && r.getSubRelType.equalsIgnoreCase(filterRelation)
+    } else {
+      !relationSemanticFilter.exists(k => k.equalsIgnoreCase(r.getRelClass))
     }
-
   }
 }