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This book contains the proceedings of the first IFIP WG 552 conference held in Seeheim, FRG, in September 14-16, 1981. With 17 papers by prominent specialists in that domain, the importance of the subject for the design, use and enlargement of CAD systems is highlighted. Especially the functionality, the flexibility and integration are dependent on data handling mechanisms and have an impact on man-machine communication, data modelling for geometry processing, implementation problems, industrial applications, system environments and research, which are the prominent subjects handled with during this working group session. A large number of different approaches are described and opens the future to new structural methods. Contents: Data modelling for CAD (3 papers); Data models for geometric modelling (2 papers); Data bases for geometric modelling (2 papers); Hardware structures (1 paper); CAD data base research issues (3 papers); Implementation problems in CAD data base systems (2 papers); Industrial applications (3 papers); Closing discussions and briefing of the results; Appendix (names and address of the participants).
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