UML package contains all OMG UML 1.4 Semantics and OMG UML 1.4 Notation implementation.
UML metamodel classes are in two packages : foundation and behavioralelements.
This version of API provides access only to foundation package.
The symbols package contains implementation of all UML notation elements, all helper classes, structures and mechanisms
for elements containing, storing, manipulating, displaying and etc.
The base class for all notation elements is PresentationElement.