A reference model of CAD system generation from various object model-basedspecification description languages specific to individual domains

This paper proposes a reference model of CAD system generation, and describ es its prototype implementation. The problems encountered in using CAD syst ems in industry involve complicated data handling and unsatisfied demands f or domain knowledge because of the lack of a way of extracting and adopting it in the system. In the example domain of architecture, the authors have already defined domain-specific BDL (Building Design Language) for architec ture experts to describe modelers of architectural structure in CAD systems by themselves. Moreover, the authors have developed a CAD system generator based on BDL descriptions. However, the different domain-specific language s required for individual domains create difficulty in developing various C AD system generators. The proposed reference model solves this problem by a pplying a common intermediate language based on the object model. Moreover, the model allows the creation of an integrated CAD system which contains m ultiple domains required by a field of industry. Its prototype implementati on demonstrates its feasibility.