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EENum EdgeType
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Defines the directional type of edges. This impacts the behavior of the editing tools as well as the display of these edges.

:ePackage: :doc:`common <./EPackage_common>`

The EENum provides the following literals:

``UNILATERAL``
  Refers to directed edges that can be spanned between two anchors (a->b) of which (a) is a source and (b) is a target.  The edge can be spannend in the direction specified from a source anchor to a target anchor.  
``BILATERAL``
  Refers to undirected edges that can be spanned between two anchors (a<->b) of which one is a source anchor and one is a target anchor.  These edges can be spanned from sources to targets and from targets to sources, but not between anchors of the same type (e.g. not between two sources).
``MANY2MANY``
  Refers to edges that can be spanned between multiple anchors (a,b,c....) of which at least one is a source anchor and at least one is a target anchor. 
``MANY2ONE``
  This eLiteral is undocumented.
``ONE2ONE``
  This eLiteral is undocumented.
``ONE2MANY``
  This eLiteral is undocumented.