Abstract

Object Comprehensions are a new query notation introduced in 1994 by Chan and Trinder to provide a declarative query language for object-oriented databases. Object Comprehensions allow queries to be expressed clearly, concisely, and processed efficiently, while incorporating many features that are missing from or inadequate in existing object-oriented query languages such as support of object-orientation, computational power and support of collection. However there is no object-oriented database (OOD) so far which incorporates Object Comprehension Language (OCL) as a query interface. This paper introduces an interpreter that evaluates the OCL query language against an in-memory database.