diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java
index a6f0ccf..4e656aa 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java
@@ -2,7 +2,7 @@ package org.gcube.informationsystem.resourceregistry.schema;
 
 import java.util.List;
 
-import org.gcube.informationsystem.base.reference.ISManageable;
+import org.gcube.informationsystem.base.reference.Element;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.schema.SchemaException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.schema.SchemaNotFoundException;
@@ -13,14 +13,14 @@ import org.gcube.informationsystem.types.reference.TypeDefinition;
  */
 public interface ResourceRegistrySchemaClient {
 
-	public <ISM extends ISManageable> TypeDefinition create(Class<ISM> clz)
+	public <ISM extends Element> TypeDefinition create(Class<ISM> clz)
 			throws SchemaException, ResourceRegistryException;
 	
 	public String create(String baseType, String typeDefinitition)
 			throws SchemaException, ResourceRegistryException;
 	
 	
-	public <ISM extends ISManageable> List<TypeDefinition> read(Class<ISM> clz, Boolean polymorphic)
+	public <ISM extends Element> List<TypeDefinition> read(Class<ISM> clz, Boolean polymorphic)
 			throws SchemaNotFoundException, ResourceRegistryException;
 	
 	public String read(String type, Boolean polymorphic)
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java
index cccdb8e..88278f1 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java
@@ -8,7 +8,7 @@ import java.util.Map;
 import org.gcube.common.gxhttp.reference.GXConnection;
 import org.gcube.common.gxhttp.request.GXHTTPStringRequest;
 import org.gcube.informationsystem.base.reference.AccessType;
-import org.gcube.informationsystem.base.reference.ISManageable;
+import org.gcube.informationsystem.base.reference.Element;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextAlreadyPresentException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
@@ -37,7 +37,7 @@ public class ResourceRegistrySchemaClientImpl implements ResourceRegistrySchemaC
 	}
 	
 	@Override
-	public <ISM extends ISManageable> TypeDefinition create(Class<ISM> clz)
+	public <ISM extends Element> TypeDefinition create(Class<ISM> clz)
 			throws SchemaException, ResourceRegistryException {
 		try {
 			String typeDefinition = TypeBinder.serializeType(clz);
@@ -79,7 +79,7 @@ public class ResourceRegistrySchemaClientImpl implements ResourceRegistrySchemaC
 	
 	
 	@Override
-	public <ISM extends ISManageable> List<TypeDefinition> read(Class<ISM> clz, Boolean polymorphic)
+	public <ISM extends Element> List<TypeDefinition> read(Class<ISM> clz, Boolean polymorphic)
 			throws SchemaNotFoundException, ResourceRegistryException {
 		try {
 			String type = Utility.getType(clz);