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Object-oriented query languages: the notion and the issues

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4 Author(s)
Bertino, E. ; Dipartimento di Matematica, Genova Univ., Italy ; Negri, M. ; Pelagatti, G. ; Sbattella, L.

The authors describe how the characteristics of an object-oriented data model, such as object identity, complex object structure, methods, and class hierarchies, have an impact on the design of a query language. They also point out major differences with respect to relational query languages. The discussion is supported through the definition of OOPC, a formal object-oriented query language based on predicate calculus, which incorporates in a consistent formal notation most features of existing object-oriented query languages

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Knowledge and Data Engineering, IEEE Transactions on  (Volume:4 ,  Issue: 3 )