Element function allInstances(a: Element, b: Element) Element function allOutgoingAssociationInstances(model: Element, source_name : String, assoc_name: String) Element function allIncomingAssociationInstances(a: Element, b: Element, c: Element) Element function readElementByName(a: Element, b: String) Element function getAttributeList(a: Element, b: Element) Element function getInstantiatableAttributes(a: Element, b: Element) String function getName(a: Element, b: Element) String function reverseKeyLookup(a: Element, b: Element) String function print_dict(dict : Element) Element function selectPossibleIncoming(model : Element, target : String, limit_set : Element) Element function selectPossibleOutgoing(model : Element, source : String, limit_set : Element)