Conceptual Graphs based representation and querying of databases

The basic idea of using Conceptual Graphs as interface to relational databases has been stated by Sowa. The full expressiveness of modern database query languages includes negation and the so-called aggregating functions too. These features were introduced in by means of Nested Concept Graphs with Cuts. The novelty of the paper relies in the specific design of the relation between tables by means of a software named CGDBInterface, which can connect to an existing database by giving the type and the name of the database, a login name and password. The software then displays the structure of the database in form of a conceptual graph. The software provides a graph editor to assist the user in constructing a query with Nested Concept Graphs. To the best of our knowledge, such a software was not developed yet.