KMVQL: a Graphical User Interface for Boolean Query Specification and Query Result Visualization
Jiwen Huo, William B. Cowan · IEEE Visualization · 2003
form of K-Maps. It is composed of four basic components: • data source • attribute value control window • K-Map control window • final visualization Visual Query Language • Specify Boolean queries graphically by selecting cells in the K-Map. • Construct complex hierarchical queries: Previously constructed K-Maps can be stored. The stored K-Maps can be used as control widgets or data source of a new K-Map to construct hierarchical queries.