diff --git a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/GraphMappingUtils.java b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/GraphMappingUtils.java
index 2069ad9f7b..bd1896b753 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/GraphMappingUtils.java
+++ b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/GraphMappingUtils.java
@@ -40,34 +40,6 @@ public class GraphMappingUtils {
 
     public static Set<String> instanceFieldFilter = Sets.newHashSet("instancetype", "hostedby", "license", "accessright", "collectedfrom", "dateofacceptance", "distributionlocation");
 
-    private static BiMap<String, String> relClassMapping = HashBiMap.create();
-
-    static {
-        relClassMapping.put("isAuthorInstitutionOf", "hasAuthorInstitution");
-        relClassMapping.put("isMergedIn", "merges");
-        relClassMapping.put("isProducedBy", "produces");
-        relClassMapping.put("hasParticipant", "isParticipant");
-        relClassMapping.put("isProvidedBy", "provides");
-        relClassMapping.put("isRelatedTo", "isRelatedTo");
-        relClassMapping.put("isAmongTopNSimilarDocuments", "hasAmongTopNSimilarDocuments");
-        relClassMapping.put("isRelatedTo", "isRelatedTo");
-        relClassMapping.put("isSupplementTo", "isSupplementedBy");
-    }
-
-    public static String getInverseRelClass(final String relClass) {
-        String res = relClassMapping.get(relClass);
-        if (isNotBlank(res)) {
-            return res;
-        }
-        res = relClassMapping.inverse().get(relClass);
-
-        if (isNotBlank(res)) {
-            return res;
-        }
-
-        throw new IllegalArgumentException("unable to find an inverse relationship class for term: " + relClass);
-    }
-
     private static final String schemeTemplate = "dnet:%s_%s_relations";
 
     private static Map<EntityType, MainEntityType> entityMapping = Maps.newHashMap();
diff --git a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/XmlRecordFactory.java b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/XmlRecordFactory.java
index b8ffd7f7af..55c5c1d3ca 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/XmlRecordFactory.java
+++ b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/graph/utils/XmlRecordFactory.java
@@ -727,13 +727,8 @@ public class XmlRecordFactory implements Serializable {
 
             }
             final DataInfo info = rel.getDataInfo();
-
-            final String inverseRelClass = getInverseRelClass(rel.getRelClass());
             final String scheme = getScheme(re.getType(), targetType);
 
-            if (StringUtils.isBlank(inverseRelClass)) {
-                throw new IllegalArgumentException("missing inverse for: " + rel.getRelClass());
-            }
             if (StringUtils.isBlank(scheme)) {
                 throw new IllegalArgumentException(String.format("missing scheme for: <%s - %s>", re.getType(), targetType));
             }
@@ -747,7 +742,7 @@ public class XmlRecordFactory implements Serializable {
                     targetType,
                     rel.getTarget(),
                     Sets.newHashSet(metadata),
-                    inverseRelClass,
+                    rel.getRelClass(),
                     scheme,
                     info));
         }
@@ -961,7 +956,7 @@ public class XmlRecordFactory implements Serializable {
 
 
     @SuppressWarnings("unchecked")
-    private String getRelFundingTree(final String xmlTree) {
+    protected static String getRelFundingTree(final String xmlTree) {
         String funding = "<funding>";
         try {
             final Document ftree = new SAXReader().read(new StringReader(xmlTree));
@@ -982,11 +977,11 @@ public class XmlRecordFactory implements Serializable {
         return funding;
     }
 
-    private String getFunderElement(final Document ftree) {
-        final String funderId = ftree.valueOf("//fundingtree/funder/id/text()");
-        final String funderShortName = ftree.valueOf("//fundingtree/funder/shortname/text()");
-        final String funderName = ftree.valueOf("//fundingtree/funder/name/text()");
-        final String funderJurisdiction = ftree.valueOf("//fundingtree/funder/jurisdiction/text()");
+    private static String getFunderElement(final Document ftree) {
+        final String funderId = ftree.valueOf("//fundingtree/funder/id");
+        final String funderShortName = ftree.valueOf("//fundingtree/funder/shortname");
+        final String funderName = ftree.valueOf("//fundingtree/funder/name");
+        final String funderJurisdiction = ftree.valueOf("//fundingtree/funder/jurisdiction");
 
         return "<funder id=\"" + escapeXml(funderId) + "\" shortname=\"" + escapeXml(funderShortName) + "\" name=\"" + escapeXml(funderName)
                 + "\" jurisdiction=\"" + escapeXml(funderJurisdiction) + "\" />";