Reconciling the needs of architectural description with object-modeling notations

  • Authors:
  • David Garlan;Shang-Wen Cheng;Andrew J. Kompanek

  • Affiliations:
  • Carnegie Mellon University, Pittsburgh, PA;Carnegie Mellon University, Pittsburgh, PA;Carnegie Mellon University, Pittsburgh, PA

  • Venue:
  • Science of Computer Programming - Special issue on unified modeling language (UML 2000)
  • Year:
  • 2002

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Abstract

Complex software systems require expressive notations for representing their software architectures. Two competing paths have emerged. One is to use a specialized notation for architecture, an architecture description language (ADL). The other is to adapt a general-purpose modeling notation, such as UML. The latter has a number of benefits, including familiarity to developers, close mapping to implementations, and commercial tool support. However, it remains an open question as to how best to use object-oriented notations for architectural description, and, indeed, whether they are sufficiently expressive, as currently defined. In this paper, we take a systematic look at these questions, examining the space of possible mappings from ADLs into UML. Specifically, we describe (a) the principal strategies for representing architectural structure in UML; (b) the benefits and limitations of each strategy; and (c) aspects of architectural description that are intrinsically difficult to model in UML using the strategies.