diff --git a/src/main/java/eu/dnetlib/dhp/schema/common/ModelConstants.java b/src/main/java/eu/dnetlib/dhp/schema/common/ModelConstants.java
index 7cae122..ddb80ee 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/common/ModelConstants.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/common/ModelConstants.java
@@ -8,6 +8,7 @@ public class ModelConstants {
 	public static final String ORCID = "orcid";
 	public static final String ORCID_PENDING = "orcid_pending";
 	public static final String ORCID_CLASSNAME = "Open Researcher and Contributor ID";
+	public static final String ORCID_DS = ORCID.toUpperCase();
 
 	public static final String CROSSREF_ID = "10|openaire____::081b82f96300b6a6e3d282bad31cb6e2";
 	public static final String DATACITE_ID = "10|openaire____::9e3be59865b2c1c335d32dae2fe7b254";