Gaphor Diagram Items
====================
The Gaphor diagram items (or in short `items`) represent UML metamodel on a
diagram.

Basic items

    DiagramItem
        Basic diagram item supporting item style, text elements
        and stereotypes.
    ElementItem
        Rectangular canvas item.
    NamedItem
        NamedElement (UML metamodel) representation.
    CompartmentItem
        An item with compartments (i.e. Class or State)
    ClassifierItem
        Classifer (UML metamodel) representation.
    DiagramLine
        Line canvas item.
    NamedLine
        NamedElement (UML metamodel) representation.

