diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java
index f9935d0aa..a466cf074 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java
@@ -10,6 +10,12 @@ public class Constants {
 	public static final Map<String, String> accessRightsCoarMap = Maps.newHashMap();
 	public static final Map<String, String> coarCodeLabelMap = Maps.newHashMap();
 
+	public static final String INFERRED = "Inferred by OpenAIRE";
+
+	public static final String HARVESTED = "Harvested";
+	public static final String DEFAULT_TRUST = "0.9";
+	public static final String USER_CLAIM = "Linked by user";;
+
 	public static String COAR_ACCESS_RIGHT_SCHEMA = "http://vocabularies.coar-repositories.org/documentation/access_rights/";
 
 	public static String ZENODO_COMMUNITY_PREFIX = "https://zenodo.org/communities/";
@@ -18,6 +24,8 @@ public class Constants {
 
 	public static String RESEARCH_INFRASTRUCTURE = "Research Infrastructure/Initiative";
 
+	public static String ORCID = "orcid";
+
 	static {
 		accessRightsCoarMap.put("OPEN", "c_abf2");
 		accessRightsCoarMap.put("RESTRICTED", "c_16ec");