diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/community/CommunityInstance.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/community/CommunityInstance.java
index 03c770e84..f520ef04f 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/community/CommunityInstance.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/community/CommunityInstance.java
@@ -1,4 +1,41 @@
 package eu.dnetlib.dhp.schema.dump.oaf.community;
 
-public class CommunityInstance {
+import eu.dnetlib.dhp.schema.dump.oaf.Instance;
+import eu.dnetlib.dhp.schema.dump.oaf.KeyValue;
+
+/**
+ * It extends eu.dnetlib.dhp.dump.oaf.Instance with values related to the community dump. In the Result dump this information
+ * is not present because it is dumped as a set of relations between the result and the datasource.
+ * - hostedby of type eu.dnetlib.dhp.schema.dump.oaf.KeyValue to store the information about the source from which the instance can be
+ *   viewed or downloaded. It is mapped against the hostedby parameter of the instance to be dumped and
+ *  - key corresponds to hostedby.key
+ *  - value corresponds to hostedby.value
+ * - collectedfrom of type eu.dnetlib.dhp.schema.dump.oaf.KeyValue to store the information about the source from which the instance has been
+ *   collected. It is mapped against the collectedfrom parameter of the instance to be dumped and
+ *   - key corresponds to collectedfrom.key
+ *   - value corresponds to collectedfrom.value
+ */
+public class CommunityInstance extends Instance {
+    private KeyValue hostedby;
+    private KeyValue collectedfrom;
+
+
+    public KeyValue getHostedby() {
+        return hostedby;
+    }
+
+
+    public void setHostedby(KeyValue hostedby) {
+        this.hostedby = hostedby;
+    }
+
+
+    public KeyValue getCollectedfrom() {
+        return collectedfrom;
+    }
+
+
+    public void setCollectedfrom(KeyValue collectedfrom) {
+        this.collectedfrom = collectedfrom;
+    }
 }