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Direct manipulation of visualizations is a powerful technique for performing exploratory data operations such as navigation, aggregation, and filtering. Its immediacy facilitatest rapid, incremental and reversible forays ino data. This paper discribes a visual query language, Visual Query Environment, that adds these capabilities to a direct manipulation exploration environment called visage. Queries and visualizations are dynamically linked; operations on either one immediately update the other, in contrast to the feedforward sequence of database query followed by visualization of results common in traditional systems. |
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