Abstract
Scenario diagrams are a well-known notation for visualizing the message flow in object-
oriented systems. Traditionally, they are used in the analysis and design phases of
software development to prototype the expected behavior of a system. We show how they can
be used reversely for understanding and browsing existing software. We have implemented a
tool called Scene that automatically produces scenario diagrams for existing object-
oriented systems. The tool makes extensive use of an active text framework providing the
basis for various hypertext-like facilities. It allows the user to browse not only
scenarios but also various kinds of associated documents, such as source code (method
definitions and calls), class interfaces, class diagrams, and call matrices.
