A composite surface is a collection of connected surfaces. The components can be simple surfaces (faces, rectangular face, and triangular strip/fans), or other composite surfaces.
The topological requirement of a composite surface is that the collection must represent a contiguous surface.
Contains: IFMESurface (0..n)
Contained by: IFMEBRepSolid, IFMECompositeSurface, IFMEMultiSurface