Abstract
EDM is a data model for managing design data of electronical products. Design data of electronic products are characterized by several equivalent descriptions, which are hierarchically structured.
The definition of EDM splits into the specification of EDM-schemes and a set of elementary EDM-operations. The specification of EDM-schemes is based on the Entity-Relationship model. The concurrent existence of several equivalent descriptions is reflected by the definition of certain scheme design rules and consistency constraints. The EDM-operations specify a universal host language interface. They support navigational access using a cursor concept.
Furthermore, the implementation of the EDM-model on top of commercially available DBMSs using a universal EDM-frontend is described. For instance, the transformation rules for mapping EDM onto the relational model are given.
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Ruland, D. (1987). EDM — A data model for electronic CAD/CAM-applications. In: Tinhofer, G., Schmidt, G. (eds) Graph-Theoretic Concepts in Computer Science. WG 1986. Lecture Notes in Computer Science, vol 246. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-17218-1_66
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DOI: https://doi.org/10.1007/3-540-17218-1_66
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