itaps-parallel ITAPS for 2D meshes

[Devine, Karen D]

In 2D meshes (e.g., triangular or quadrilateral elements), what is the
entity type for an element?  Is it a region?  Or must regions be 3D?

Here's the reason I ask.  The function iMeshP_createGhostEnts takes as
integer arguments a ghost dimension and bridge dimension.  At first, I
thought of these arguments as entity types, e.g., regions and faces.  But
when I started to draw my 2D picture for the SC08 slides, I realized that
what I thought of as regions were actually 2D....so what should the ghost
dimension be?

Would the ghost function be clearer taking entity types rather than numeric
dimensions?

Thanks.
Karen