Modeling concepts for VLSI CAD objects
ACM Transactions on Database Systems (TODS)
A database interface for an integrated CAD system
DAC '86 Proceedings of the 23rd ACM/IEEE Design Automation Conference
Semantic Data Engineering for Generalized Databases
Proceedings of the Second International Conference on Data Engineering
Information Processing for CAD/VLSI on a Generalized Data Management System
VLDB '84 Proceedings of the 10th International Conference on Very Large Data Bases
A design methodology based upon symbolic layout and integrated cad tools
DAC '82 Proceedings of the 19th Design Automation Conference
An object-oriented approach to data management: why design databases need it
DAC '87 Proceedings of the 24th ACM/IEEE Design Automation Conference
An approach to intelligent assistance for the specification of ASIC design using objects and rules
DAC '89 Proceedings of the 26th ACM/IEEE Design Automation Conference
GARDEN—an integrated and evolving environment for ULSI/VLSI CAD applications
IBM Systems Journal
An object-oriented VHDL design environment
DAC '90 Proceedings of the 27th ACM/IEEE Design Automation Conference
Multiple object representations
CSC '92 Proceedings of the 1992 ACM annual conference on Communications
A database interface for an integrated CAD system
DAC '86 Proceedings of the 23rd ACM/IEEE Design Automation Conference
Expert Database Support for Consistent Dynamic Objects
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
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This paper presents some fundamental issues related to the design and implementation of CAD oriented database systems. Integrating databases in sophisticated CAD environments requires functionalities usually not provided by existing systems, e.g. relational or entity-relationship systems. For instance, consistency controls have to provide richer and more flexible features than the former “take it or leave it” paradigm.The basic aspects are examined here with respect to the nature of CAD objects, to their consistency states and to their dynamicity. The nature of CAD objects concerns the complexity of their structure and of their relationships. The state of CAD objects concerns their completeness with considerations to their consistency. Finally, the dynamicity of CAD objects concerns the evolving nature of their structure and of their property values, i.e. their behavior, with connections to versions and representations.These concepts are defined and detailed with examples drawn from VLSI circuit design. The functionalities of a prototype CAD database system offering new solutions in these areas are presented, calling upon object-oriented concepts and logic-programming. It is currently being tested for VLSI circuit design in cooperation with the CAD Research Dept at CNET.