Graphical user languages for querying information: where to look for criteria?

Abstract

The different parameters of a graphical user language, concerning kinds of representation and kinds of operations on these representations, are outlined. These parameters are related to the characteristics of tasks that they more or less support. Special aspects of a graphical query language have been derived from the psychological findings. The conceptual framework of R. Jackendoff (1983) is used to model user concepts in graphical query languages and to translate these concepts to relational database semantics.<>