Gql, a declarative graphical query language based on the functional data model

Authors:
Anthony Papantonakis;Peter J. H. King
Affiliations:
Department of Computer Science, Birkbeck College, University of London, Malet Street, London WC1E 7HX, U.K.;Department of Computer Science, Birkbeck College, University of London, Malet Street, London WC1E 7HX, U.K.
Venue:
AVI '94 Proceedings of the workshop on Advanced visual interfaces
Year:
1994

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Abstract

We present in this paper Gql, a declarative graphical query language based on the functional data model. Gql queries are fully represented by a single diagram. Without containing any explicit boolean operators or logical quantifiers, Gql provides users of varying degrees of programming experience, with the same expressive power for retrieval as SQL. The design philosophy and characteristics of the language are discussed, and an informal presentation of Gql's constructs and semantics is given. Finally, gql_int, the implementation of an interface for the language, is described.