E. A Technical Architecture of 3D Model Knowledge
Engineering
Fig. 6 is a technical architecture of 3D model knowledge
engineering which consists of four levels. The bottom of this
architecture is the knowledge storage level and it is a 3D
model knowledge base. The existing knowledge is stored in
this base as a fix structure. The next level above is knowledge
management level which functions as the connection of
knowledge storage, knowledge representation and knowledge
reuse. This level consists of knowledge search, knowledge
base management and 3D model knowledge acquisition
technologies. The next level is knowledge representation
which serves as the base of how knowledge can be shown in
3D CAD systems and it is the nearest level to knowledge reuse.
Knowledge reuse level is on the top of this architecture. 3D
model knowledge retrieval and 3D model knowledge browse
are the two main parts of this level.