Enhanced Dynamic Queries via Movable Filters

, and . Human Factors in Computing Systems, page 415--420. Denver, Colorado, (1995)
DOI: 10.1145/223904.223960


Traditional database query systems allow users to constructcomplicated database queries from specialized databaselanguage primitives. While powerful and expressive, suchsystems are not easy to use, especially for browsing orexploring the data. Information visualization systems addressthis problem by providing graphical presentations of the dataand direct manipulation tools for exploring the data. Recentwork in this area has reported the value of dynamic queriescoupled with two-dimensional data representations forprogressive refinement of user queries. However, the queriesgenerated by these systems are limited to conjunctions ofglobal ranges of parameter values. In this paper, we extenddynamic queries by encoding each operand of the query as aMagic Lens filter. Compound queries can be constructed byoverlapping the lenses. Each lens includes a slider and a set ofbuttons to control the value of the filter function and to definethe compostion operation generated by overlapping the lenses.We demonstrate a system that supports multiple simultaneousgeneral real-valued queries on databases with incomplete data,while maintaining the simple visual interface of dynamic querysystems


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