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GME-MOF: The MOF-Based GME Metamodeling Environment
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  1. OOPSLA 2004 Domain-Specific Modeling Workshop GME-MOF: The MOF-Based GME Metamodeling Environment Matt Emerson 10/24/2004 <mjemerson@isis.vanderbilt.edu> Advisor: Dr. Janos Sztipanovits

  2. Motivation • The core of MIC is the development of DSMLs. • GME provides MetaGME, a metamodeling language for DSLM specification. • The OMG has adopted MOF as the standard metamodeling language • What is the technical merit of the MOF standard vs. MetaGME? • How can GME adapt to meet this standardwith minimum pain? OOPSLA 2004 Matt Emerson 2

  3. Outline • Overview of GME and MetaGME • Overview of MOF • GME-MOF: The MOF-based GME metamodeling environment OOPSLA 2004 Matt Emerson 3

  4. GME • Meta-programmable modeling tool • Platform for the development of many model-based embedded systems tools • Includes a metamodeling language which predates MOF:MetaGME OOPSLA 2004 Matt Emerson 4

  5. GME Modeling Hierarchy OOPSLA 2004 Matt Emerson 5

  6. MetaGME • Based on UML Class Diagrams and OCL • Class Stereotypes imply the abstract syntax of elements in the metamodel: • : Compositional containers • : Primitive objects • : Pointers to model objects • : Aggregate containers • : Analogous to UML Association Classes • : Logical visual partitions of a system OOPSLA 2004 Matt Emerson 6

  7. MOF • OMG Standard metamodeling language • Simplification of UML Class Diagrams • Used as definition language for many OMG specifications: • UML • CWM • OCL • XMI • One use case is the specification of DSMLs OOPSLA 2004 Matt Emerson 7

  8. GME-MOF: Design Forces • Tight correspondence between MetaGME stereotypes and GME configuration file entities • Existing tools support, including: • Constraint Checker • Metamodel Interpreter • Existing user base and modeling languages • Kinship of MOF and MetaGME • Both based on UML Class Diagrams OOPSLA 2004 Matt Emerson 8

  9. GME-MOF OOPSLA 2004 Matt Emerson 9

  10. GME-MOF • Leverages existing metamodeling language • Leverages existing metamodel translation tool • MOF provides an MDA-style interface for GME Metamodeling OOPSLA 2004 Matt Emerson 10

  11. MOF-to-MetaGME Translation • Model-to-model translation • Design using the Graph Rewriting and Transformation Language (GReAT) • Guided by MOF Tags • Not isomorphic OOPSLA 2004 Matt Emerson 11

  12. Specifying the Translation Mapping MOF Primitive-type Attributes to MetaGME FieldAttributes • Match the pattern visualized in black. • Create the pattern visualized in blue. OOPSLA 2004 Matt Emerson 12

  13. Translation Limitations • How to meaningfully represent in GME: • Singleton Classes • Derived Attributes • Derived Associations • Attributes of arbitrary types • MOF-style metamodel importation OOPSLA 2004 Matt Emerson 13

  14. Translation Example: UML Class Diagrams Input (MOF) Output (MetaGME) OOPSLA 2004 Matt Emerson 14

  15. GME-MOF: An MDA Interface for GME • Leverages existing metamodeling language • Leverages existing metamodel translation tool • MOF provides an MDA-style interface for GME Metamodeling • Solution illustrates the versatility of metamodeling and meta-programmable tools OOPSLA 2004 Matt Emerson 15

  16. OOPSLA 2004 Domain-Specific Modeling Workshop GME-MOF: The MOF-Based GME Metamodeling Environment Matt Emerson 10/24/2004 <mjemerson@isis.vanderbilt.edu> Advisor: Dr. Janos Sztipanovits