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Performance is a major issue in the acceptance of object-oriented and relational database systems aimed at engineering applications such as computer-aided software engineering (CASE) and computer-aided design (CAD). Because traditional database systems benchmarks are inapproriate to measure performance for operations on engineering objects, we designed a(More)
A user interface to a database designed for casual, interactive use is presented. The interface is <i>entity-based:</i> the data display to the user is based upon entities (e.g., persons, documents, organizations) that participate in relationships, rather than upon relations alone as in the relational data model. Examples from an implementation of the(More)