diff --git a/src/main/java/org/gcube/gcat/api/GCatConstants.java b/src/main/java/org/gcube/gcat/api/GCatConstants.java
index 0fe4ccf..16a376b 100644
--- a/src/main/java/org/gcube/gcat/api/GCatConstants.java
+++ b/src/main/java/org/gcube/gcat/api/GCatConstants.java
@@ -14,6 +14,7 @@ public class GCatConstants {
 	public static final String LIMIT_PARAMETER = "limit";
 	public static final String OFFSET_PARAMETER = "offset";
 	public static final String COUNT_PARAMETER = "count";
+	public static final String OWN_ONLY_QUERY_PARAMETER = "own_only";
 	
 	public static final String COUNT_KEY = "count";
 	
@@ -25,6 +26,7 @@ public class GCatConstants {
 	
 	public static final String REFER_ONLY_RESOURCE_QUERY_PARAMETER = "refers_only";
 	
+	
 	public static final String ORGANIZATION_FILTER_TEMPLATE = ORGANIZATION_PARAMETER + ":%s";
 	
 }