PICQUERY: A High Level Query Language for Pictorial Database Management
نویسندگان
چکیده
A reasonably comprehensive set of data accessing and manipulation operations that should be supported by a generalized pictorial database management system (PDBMS) is proposed. A corresponding high level query language, PICQUERY, is presented and illustrated through examples. PICQUERY has been designed with a flavor similar to QBE as the highly nonprocedural and conversational language for the pictorial database management system PICDMS, designed and developed at UCLA. PICQUERY and a relational QBE-like language would form the language by which a user may access conventional relational data bases and at the same time pictorial databases managed by PICDMS or other robust PDBMS. This language interface is part of an architecture toward data heterogeneity’transparency over pictorial and nonpictorial databases.
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