diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java
index 95dd1e1ca..cccf15398 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java
@@ -75,6 +75,8 @@ public abstract class AbstractMdRecordToOafMapper {
 	protected static final Qualifier MAG_PID_TYPE = qualifier(
 		"MAGIdentifier", "Microsoft Academic Graph Identifier", DNET_PID_TYPES, DNET_PID_TYPES);
 
+	protected static final String DEFAULT_TRUST_FOR_VALIDATED_RELS = "0.999";
+
 	protected static final Map<String, String> nsContext = new HashMap<>();
 
 	static {
@@ -244,25 +246,54 @@ public abstract class AbstractMdRecordToOafMapper {
 
 			final String originalId = ((Node) o).getText();
 
+			final String validationdDate = ((Node) o).valueOf("@validationDate");
+
 			if (StringUtils.isNotBlank(originalId)) {
 				final String projectId = createOpenaireId(40, originalId, true);
 
 				res
 					.add(
-						getRelation(
+						getRelationWithValidationDate(
 							docId, projectId, RESULT_PROJECT, OUTCOME, IS_PRODUCED_BY, collectedFrom, info,
-							lastUpdateTimestamp));
+							lastUpdateTimestamp, validationdDate));
 				res
 					.add(
-						getRelation(
+						getRelationWithValidationDate(
 							projectId, docId, RESULT_PROJECT, OUTCOME, PRODUCES, collectedFrom, info,
-							lastUpdateTimestamp));
+							lastUpdateTimestamp, validationdDate));
 			}
 		}
 
 		return res;
 	}
 
+	protected Relation getRelationWithValidationDate(final String source,
+		final String target,
+		final String relType,
+		final String subRelType,
+		final String relClass,
+		final KeyValue collectedFrom,
+		final DataInfo info,
+		final long lastUpdateTimestamp,
+		final String validationDate) {
+
+		final Relation r = getRelation(
+			source, target, relType, subRelType, relClass, collectedFrom, info, lastUpdateTimestamp);
+		r.setValidated(StringUtils.isNotBlank(validationDate));
+		r.setValidationDate(StringUtils.isNotBlank(validationDate) ? validationDate : null);
+
+		if (StringUtils.isNotBlank(validationDate)) {
+			r.setValidated(true);
+			r.setValidationDate(validationDate);
+			r.getDataInfo().setTrust(DEFAULT_TRUST_FOR_VALIDATED_RELS);
+		} else {
+			r.setValidated(false);
+			r.setValidationDate(null);
+		}
+
+		return r;
+	}
+
 	protected Relation getRelation(final String source,
 		final String target,
 		final String relType,
diff --git a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java
index 46cb1a535..a0348f8ec 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java
+++ b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java
@@ -141,7 +141,10 @@ public class MappersTest {
 		assertTrue(StringUtils.isNotBlank(r2.getRelClass()));
 		assertTrue(StringUtils.isNotBlank(r1.getRelType()));
 		assertTrue(StringUtils.isNotBlank(r2.getRelType()));
-
+		assertTrue(r1.getValidated());
+		assertTrue(r2.getValidated());
+		assertEquals(r1.getValidationDate(), "2020-01-01");
+		assertEquals(r2.getValidationDate(), "2020-01-01");
 		// System.out.println(new ObjectMapper().writeValueAsString(p));
 		// System.out.println(new ObjectMapper().writeValueAsString(r1));
 		// System.out.println(new ObjectMapper().writeValueAsString(r2));
@@ -246,6 +249,10 @@ public class MappersTest {
 		assertTrue(StringUtils.isNotBlank(r2.getRelClass()));
 		assertTrue(StringUtils.isNotBlank(r1.getRelType()));
 		assertTrue(StringUtils.isNotBlank(r2.getRelType()));
+		assertTrue(r1.getValidated());
+		assertTrue(r2.getValidated());
+		assertEquals(r1.getValidationDate(), "2020-01-01");
+		assertEquals(r2.getValidationDate(), "2020-01-01");
 	}
 
 	@Test
diff --git a/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/oaf_record.xml b/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/oaf_record.xml
index 2c6c98ebb..f4b0c477f 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/oaf_record.xml
+++ b/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/oaf_record.xml
@@ -51,7 +51,7 @@
     <!--<dr:CobjCategory type="publication">0001</dr:CobjCategory>-->
     <dr:CobjCategory>0001</dr:CobjCategory>
     <oaf:dateAccepted>2017-01-01</oaf:dateAccepted>
-    <oaf:projectid>corda_______::226852</oaf:projectid>
+    <oaf:projectid validationDate="2020-01-01">corda_______::226852</oaf:projectid>
     <oaf:accessrights>OPEN</oaf:accessrights>
     <oaf:hostedBy id="openaire____::issn226852" name="One Ecosystem"/>
     <oaf:collectedFrom
diff --git a/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/odf_dataset.xml b/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/odf_dataset.xml
index 6648d1804..31de2e45b 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/odf_dataset.xml
+++ b/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/raw/odf_dataset.xml
@@ -89,7 +89,7 @@
     <oaf:language>und</oaf:language>
     <oaf:concept id="https://zenodo.org/communities/epfl"/>
     <oaf:hostedBy id="re3data_____::r3d100010468" name="Zenodo"/>
-    <oaf:projectid>corda_______::226852</oaf:projectid>
+    <oaf:projectid validationDate="2020-01-01">corda_______::226852</oaf:projectid>
     <oaf:collectedFrom id="re3data_____::r3d100010468" name="Zenodo"/>
     <oaf:refereed>0001</oaf:refereed>s
   </metadata>