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1985 Progress Report-UM ECAD Research Program

IP.com Disclosure Number: IPCOM000128577D
Original Publication Date: 1986-Dec-31
Included in the Prior Art Database: 2005-Sep-16
Document File: 7 page(s) / 28K

Publishing Venue

Software Patent Institute

Related People

Valdis Berzins: AUTHOR [+2]


This report summarizes some research on database support for computer aided design of elec-tronic systems supported by Control Data, Honeywell, and Sperry Corporation in 1985.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 15% of the total text.

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1985 Progress Report-UM ECAD Research Program


Valdis Berzins

Computer Science Department

136 Lind Hall.

Institute of Technology

University of Minnesota

Minneapolis, Minnesota 554-)-,

TR 86-1

February 1986

Technical Report Progress Report - UM EGAD Research Program

Valdis Berzins


This report summarizes some research on database support for computer aided design of elec- tronic systems supported by Control Data, Honeywell, and Sperry Corporation in 1985.

1. A Logical Data Modeling Formalism to Support an EGAD Environment

The requirements of the management of databases in CAD applications were analyzed, and the following four requirements were investigated:

(1) Organizing and retrieving the descriptions of design objects in databases.

(2) Managing refinements, alternatives, and versions of assemblies.

(3) Modeling facilities for CAD databases.

(4) Designing part databases. The results of this investigation provided an objets-oriented framework, within which other requirements of the management of design data can be addressed. The framework can be used to increase the productivity of CAD operations, because it provides facilities which are needed for achieving effective management of design databases. This is the practical impor-tance of this research. New insights into the composite

University of Minnesota Page 1 Dec 31, 1986

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1985 Progress Report-UM ECAD Research Program

nature of design data, iterative and tentative nature of design process, and modeling requirements of design applications were gained through the well-founded theories developed in this research. The mathematical model of composite objects, the theory of refinements and alternatives, the theory of generalization per category, and an object-oriented data model, which are new developments in the field of database technology, are important theoretical results that were produced.

Future work based on this research should concentrate on: (1) The development of a prototype database management system based on the framework provided by this research.

(2) The development of solutions for related problems within the framework.

(3) The applications of concepts and techniques to other areas. The following papers and technical reports were published based on the results of this research:

M. Ketabchi, 1985.

Refereed Papers: (1) "Generalization Per Category: Theory and Application," Proceedings of the International Conference on Information Syatema M. Ketabchi, V. Berzins, and K. Maly (2) "ODM: An Object-Oriented Data Model for Design Databases;" to appear in Proceeding of the Computer Science Conference 86 M. Ketabchi, V. Berzins and S. March

Technical Reports: (1) "Component Aggregation: An Abstraction Mechanism for Design and Engineering data-bases;" Tech. Rep. 84-85, Department of Computer and Information Science, Univ...