[V8i MicroStationAPI] ElementFacetSet

The ElementFacetSet class provides plenty of information about the facets it holds.  Unfortunately the methods that reveal the information are sparsely documented in MicroStationAPI help.

For example...

1. How are points (obtained using GetPoint()) and point indices (obtained using GetPointIndices()) related?
2. Are facets always (a) triangular, (b) rectangular or a mixture of those?
3. What does GetNumPerFace() tell us?
4. Are ElementFacetSet and PolyFaceArrays related?