document: A knowledge-navigation system for dimensional metrology Geometric dimensioning and tolerancing -LRB- GD&T -RRB- is a method to specify the dimensions and form of a part so that it will meet its design intent . GD&T is difficult to master for two main reasons . First , it is based on complex 3D geometric entities and relationships . Second , the geometry is associated with a large , diverse knowledge base of dimensional metrology with many interconnections . This paper describes an approach to create a dimensional metrology knowledge base that is organized around a set of key concepts and to represent those concepts as virtual objects that can be navigated with interactive , computer visualization techniques to access the associated knowledge . The approach can enable several applications . First is the application to convey the definition and meaning of GD&T over a broad range of tolerance types . Second is the application to provide a visualization of dimensional metrology knowledge within a control hierarchy of the inspection process . Third is the application to show the coverage of interoperability standards to enable industry to make decisions on standards development and harmonization efforts . A prototype system has been implemented to demonstrate the principles involved in the approach
doc_bio_tags: O O O O B I B I O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O B I O O O O O O O B O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: geometric dimensioning tolerancing dimensional metrology visualization interoperability standards inspection
abstractive_keyphrases: knowledge navigation manufacturing training vrml web