@InProceedings{Gogolla:2000:GraGra,
  author =       "Martin Gogolla",
  title =        "Graph Transformations on the {UML} Metamodel",
  booktitle =    "Proc. ICALP Workshop Graph Transformations and Visual
                  Modeling Techniques (GVMT'2000)",
  year =         "2000",
  editor =       "Jose D. P. Rolim and Andrei Z. Broder and Andrea
                  Corradini and Roberto Gorrieri and Reiko Heckel and Juraj
                  Hromkovic and Ugo Vaccaro and Joe B. Wells",
  pages =        "359--371",
  publisher =    "Carleton Scientific, Waterloo, Ontario, Canada",
  isbn =         "1-894145-07-0",
  abstract =     "The Unified Modeling Language UML is a rich language so
                  that it seems not feasible to give a single semantics for
                  the complete language in one step. In order to define the
                  semantics, we propose to translate as many UML language
                  features as possible into UML itself. The part of UML
                  which cannot be treated in this way is called the UML
                  core. The semantics of the non-core language features is
                  given by a translation into the core, whereas a different
                  semantics\~(for example a set-theoretic one or a
                  semantics on the basis of graphs) must be given to the
                  UML core. It turns out that for the first step, namely
                  the translation of UML language features into the UML
                  core, graph transformations are an ideal language for
                  expressing the required manipulations and the UML
                  metamodel gives the necessary fundamental vocabulary and
                  notions.",
}