diff --git a/src/org/gcube/application/framework/core/util/SessionConstants.java b/src/org/gcube/application/framework/core/util/SessionConstants.java
index 8dd6b12..02f1ec0 100644
--- a/src/org/gcube/application/framework/core/util/SessionConstants.java
+++ b/src/org/gcube/application/framework/core/util/SessionConstants.java
@@ -17,11 +17,22 @@ public class SessionConstants {
 	 */
 	public static final String SchemataInfo = "SchemataInfo";
 	
+	/**
+	 * Used for a variable in the session representing a HashMap<String, ArrayList<SchemaFieldPair>>:
+	 * pairs: (abstract field, list of mappable field for each schema)
+	 */
+	public static final String abstractFieldsInfo = "AbstractFieldsInfo";
+	
 	/**
 	 * Used for generic resource name which contains info about searchable fields per schema...
 	 */
 	public static final String MetadataSchemaInfo = "MetadataSchemaInfo";
 	
+	/**
+	 * Used for generic resource name which contains info about mappable fields per abstarct field and for every schema
+	 */
+	public static final String SearchFieldsMappingAbstraction = "SearchFieldsMappingAbstraction";
+	
 	/**
 	 * Used for a variable in the session representing the available collections
 	 */