Definition of Terms
  - connection
- A connection is an object from the application's model.  Connections
    link two other objects together, referred to as nodes.  One node is
    referred to as the source, the other the target.  In some
    applications, a connection may itself be a source or target node of another
    connection.  GEF assumes that nodes know, or can obtain, the
    connections for which they are the source or target.  The application
    does not need to have collection of all connections in it.
- source connection
- An "outgoing" connection.  The connection is leaving the
    object being talked about, making it the source of the connection.
- source node
- The model object that is the source of a connection.
- visuals
- Objects that are visible and rendered to the user in some way.  Most
    EditParts have visuals which they manage.  Examples include draw2d
    Figures and SWT TreeItems.