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VLDB
1989
ACM

Pasta-3's Graphical Query Language: Direct Manipulation, Cooperative Queries, Full Expressive Power

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Pasta-3's Graphical Query Language: Direct Manipulation, Cooperative Queries, Full Expressive Power
Graphical Direct Manipulation (GrDM) query languagesare characterized and positioned with respect to traditional textual query languages. After a brief survey of the current stateof the art, the Pasta-3GrDM query language is presented,with emphasison three featuresthat make significant new contributions to this field: (1) its GrDM basis (query editing through clicking and dragging of an iconic representationof the query expression),(2) its cooperative environment (handy values, automatic path completion, edit-and-reevaluateloop), and (3) its expressive power (arbitrarily complex conditions, recursive queries, logical variables and quantification, subqueries, mixing in Prolog code). Severalexamplestaken directly from the nearly completeimplementation are discussedin detail.
Michel Kuntz, Rainer Melchert
Added 11 Aug 2010
Updated 11 Aug 2010
Type Conference
Year 1989
Where VLDB
Authors Michel Kuntz, Rainer Melchert
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