Concepts in CAD data base structures
DAC '76 Proceedings of the 13th Design Automation Conference
Design validation in hierarchical systems
DAC '75 Proceedings of the 12th Design Automation Conference
Some Computer Aided Engineering System design principles
DAC '83 Proceedings of the 20th Design Automation Conference
A vertically organized computer-aided design data base
DAC '81 Proceedings of the 18th Design Automation Conference
The design of a data base organization for an electronic equipment DA system
DAC '78 Proceedings of the 15th Design Automation Conference
Functional level simulation at Raytheon
DAC '80 Proceedings of the 17th Design Automation Conference
A database approach for managing VLSI design data
DAC '82 Proceedings of the 19th Design Automation Conference
QCADS-a LSI CAD system for minicomputer
DAC '82 Proceedings of the 19th Design Automation Conference
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Within the field of Design Automation, the term “data base” has generally lacked a precise definition, but it usually describes a system which integrates, organizes, and controls a large amount of data. In this paper, we will examine two approaches to implementing a CAD data base - an MIS-type system where one logical and one physical representation of data exist, and an alternate system where one logical data base structure is physically utilized many times. We will discuss the advantages and disadvantages of the second approach, which we implemented at Raytheon.