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dc.contributor.authorWeiland, William J.en_US
dc.contributor.authorShneiderman, Benen_US
dc.date.accessioned2004-05-31T21:00:03Z
dc.date.available2004-05-31T21:00:03Z
dc.date.created1991-07en_US
dc.date.issued1998-10-15en_US
dc.identifier.urihttp://hdl.handle.net/1903/372
dc.description.abstractIn order for automated information systems to be used effectively, they must be made easily accessible to a wide range of users and with short training periods. This work proposes a method of organizing documents based on the concepts of aggregation and generalization hierarchies. We propose a graphical user interface to provide a more intuitive form of Boolean query. This design is based on mapping the nodes of the aggregation hierarchy to Boolean intersection operations, mapping the nodes of the generalization hierarchy to Boolean union operations, and providing a concrete, graphical, manipulable representation of both of these node types. Finally, a working prototype interface was constructed and evaluated experimentally against a classical command-line Boolean query interface. In this formative evaluation with sixteen subjects, the graphical interface produced less than one-tenth the errors of the textual interface, on average. Significant differences in time spent specifying queries were not found. Observations and comments provide guidance for designers. (Also cross-referenced as CAR-TR-562)en_US
dc.format.extent3231219 bytes
dc.format.mimetypeapplication/postscript
dc.language.isoen_US
dc.relation.ispartofseriesUM Computer Science Department; CS-TR-2702en_US
dc.relation.ispartofseriesCAR-TR-562en_US
dc.titleA Graphical Query Interface Based on Aggregation/Generalization Hierarchiesen_US
dc.typeTechnical Reporten_US
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_US
dc.relation.isAvailableAtUniversity of Maryland (College Park, Md.)en_US
dc.relation.isAvailableAtTech Reports in Computer Science and Engineeringen_US
dc.relation.isAvailableAtComputer Science Department Technical Reportsen_US


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