How to represent 3D model knowledge appropriately in 3D
CAD system plays an important role in the reuse of 3D model
knowledge. An appropriate way to represent knowledge will
help users understand the design process and design supports
quickly and precisely. Because the superiority of 3D model is
truly showing geometry of product, annotating mathematical
knowledge and functional knowledge on the 3D solid model
will be the best way for knowledge representation, like how to
determine the size of a part, what’s the function of a hole and
how to realize that function, these kinds of knowledge can be
represented by annotating.