Graphical query languages for semantic database models
Bogdan Czejdo, Ramez A. Elmasri, Marek Rusinkiewicz, David W. Embley · afips · 1899
Graphical representations of database schemas such as entity-relationship diagrams are commonly used to support database design. In this paper we discuss graphical representations of semantic data models and their application to interactive query languages. Operators that are appropriate for graphical query formulation are defined for several semantic data models. We also discuss a general method for implementing graphical interfaces to database systems that can be applied to a wide range of semantic data models.