A visual interface for querying a CASE repository

We propose a visual user interface for formulating Boolean queries over a CASE repository. The work is motivated by the successful adoption of the visual query paradigm in the conventional database area. With its graphical query representation system such a query system could ease the user's tasks of formulating database queries when compared with linear textual query representations. We describe the adopted human-computer interaction techniques in this visual query interface. Specifically, we illustrate those features that seek to solve "CASE-specific" query tasks, or that are distinct from other visual query systems. We show how with this query interface the user can easily formulate arbitrary Boolean queries over a CASE repository.