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Abstract

This paper proposes a temporal, object-oriented query language called TOOSQL which has an SQL-like syntax and compares it with other recent developments in the area. TOOSQL was designed to satisfy the criteria for temporal languages developed in previous work on temporal relational models and to extend this criteria to a language for an object-oriented medel which has several inherent features that make it a more attractive basis for a temporal data model. TOOSQL differs from previous work and ccmcurrent efforts in its support for corrections, schema updates, time-sequence operations and user-defined operations. A grammar is developed as a means of formalizing TOOSQL. Fin,lly. we conclude with a discussion of open issues.