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           Department of Computer Science, University of Toronto
         (SF = Sandford Fleming Building, 10 King's College Road)

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                                COLLOQUIUM
                  SF1105, at 11:00 a.m., 8 December 1992

                                 Mary Shaw
                        Carnegie Mellon University

         "Heterogeneous Design Idioms for Software Architectures"

Software designers use a variety of structural patterns to specify system
architectures.  These patterns, or idioms, are currently used informally
and imprecisely.  Nevertheless, they provide a useful, broadly shared
vocabulary.  In practice, a given design often relies on several patterns.
This talk reviews some common architectural idioms, shows several ways in
which they are used heterogeneously, describes deficiencies of current
module interconnection languages, and discusses the  benefits of making
these idioms and their combinations more explicit and precise.

Mary Shaw: Mary Shaw is a Professor of Computer Science at Carnegie Mellon
University.  Her research interests are in programming systems and software
engineering, particularly abstraction techniques and language tools for
developing and evaluating software.