diff --git a/src/main/java/eu/dnetlib/app/directindex/input/ResultEntry.java b/src/main/java/eu/dnetlib/app/directindex/input/ResultEntry.java
index 226e67c..0c6aad6 100644
--- a/src/main/java/eu/dnetlib/app/directindex/input/ResultEntry.java
+++ b/src/main/java/eu/dnetlib/app/directindex/input/ResultEntry.java
@@ -40,7 +40,7 @@ public class ResultEntry implements Serializable {
 	@Schema(allowableValues = { "publication", "dataset", "software", "other" })
 	private String type = "publication";
 
-	@Schema(requiredMode = RequiredMode.REQUIRED, description = "Use 001 for articles, 021 for datasets, 0029 for software. See: http://api.openaire.eu/vocabularies/dnet:publication_resource for all the available resource types.")
+	@Schema(requiredMode = RequiredMode.REQUIRED, description = "Use 0001 for articles, 0021 for datasets, 0029 for software. See: http://api.openaire.eu/vocabularies/dnet:publication_resource for all the available resource types.")
 	private String resourceType;
 
 	@Schema(requiredMode = RequiredMode.REQUIRED)
diff --git a/src/main/java/eu/dnetlib/app/directindex/mapping/InstanceWithTypeCode.java b/src/main/java/eu/dnetlib/app/directindex/mapping/InstanceWithTypeCode.java
new file mode 100644
index 0000000..c6ccadb
--- /dev/null
+++ b/src/main/java/eu/dnetlib/app/directindex/mapping/InstanceWithTypeCode.java
@@ -0,0 +1,20 @@
+package eu.dnetlib.app.directindex.mapping;
+
+import eu.dnetlib.dhp.schema.solr.Instance;
+
+// TODO: To delete after the dismission of the XML
+public class InstanceWithTypeCode extends Instance {
+
+	private static final long serialVersionUID = -5415824868827493090L;
+
+	private String instancetypeCode;
+
+	public String getInstancetypeCode() {
+		return instancetypeCode;
+	}
+
+	public void setInstancetypeCode(final String instancetypeCode) {
+		this.instancetypeCode = instancetypeCode;
+	}
+
+}
diff --git a/src/main/java/eu/dnetlib/app/directindex/mapping/SolrRecordMapper.java b/src/main/java/eu/dnetlib/app/directindex/mapping/SolrRecordMapper.java
index bab5ca3..40e519e 100644
--- a/src/main/java/eu/dnetlib/app/directindex/mapping/SolrRecordMapper.java
+++ b/src/main/java/eu/dnetlib/app/directindex/mapping/SolrRecordMapper.java
@@ -264,10 +264,10 @@ public class SolrRecordMapper {
 			r.setBestaccessright(BestAccessRight.newInstance("UNKNOWN", "not available"));
 		}
 
-		final Instance instance = new Instance();
-
-		// TODO verificare il valore (dovrebbe essere classid="0004" classname="Conference object")
-		instance.setInstancetype(re.getResourceType());
+		// TODO: To replace with Instance after the dismission of the XML
+		final InstanceWithTypeCode instance = new InstanceWithTypeCode();
+		instance.setInstancetype(vocClient.findTermLabel("dnet:publication_resource", re.getResourceType()));
+		instance.setInstancetypeCode(re.getResourceType());
 		instance.setCollectedfrom(collectedFrom);
 		instance.setHostedby(hostedBy);
 		instance.setPid(pids);
diff --git a/src/main/java/eu/dnetlib/app/directindex/solr/XMLSolrSerializer.java b/src/main/java/eu/dnetlib/app/directindex/solr/XMLSolrSerializer.java
index da9ff01..2c2e941 100644
--- a/src/main/java/eu/dnetlib/app/directindex/solr/XMLSolrSerializer.java
+++ b/src/main/java/eu/dnetlib/app/directindex/solr/XMLSolrSerializer.java
@@ -6,6 +6,7 @@ import org.dom4j.Element;
 import org.dom4j.Namespace;
 import org.dom4j.QName;
 
+import eu.dnetlib.app.directindex.mapping.InstanceWithTypeCode;
 import eu.dnetlib.dhp.schema.common.ModelConstants;
 import eu.dnetlib.dhp.schema.solr.BestAccessRight;
 import eu.dnetlib.dhp.schema.solr.Instance;
@@ -135,8 +136,9 @@ public class XMLSolrSerializer {
 	private static void addResultInstance(final Element childrenNode, final Instance i) {
 		final Element instanceNode = childrenNode.addElement("instance");
 
-		//TODO manca il code o il name
-		addStructuredField(instanceNode, "instancetype", i.getInstancetype(), ModelConstants.DNET_PUBLICATION_RESOURCE, null);
+		if (i instanceof InstanceWithTypeCode) {
+			addStructuredField(instanceNode, "instancetype", ((InstanceWithTypeCode) i).getInstancetypeCode(), i.getInstancetype(), ModelConstants.DNET_PUBLICATION_RESOURCE, null);
+		}
 
 		addStructuredField(instanceNode, "accessright", i.getAccessright().getCode(), i.getAccessright().getLabel(), ModelConstants.DNET_ACCESS_MODES, null);