EMF Facet is a tool that allows non-intrusive extension of metamodels. It allows adding new attributes, operations, links, and subtypes without modifying the original metamodel. EMF Facet extensions are reusable across projects and do not require changes to existing models. The document provides examples of using EMF Facet to extend UML for SysML, extend Java metamodels for JPA and JUnit by adding new attributes and relations. EMF Facet is an open source Eclipse project initially contributed by MoDisco that provides customizable and computable extensions to metamodels.

1. EMF FacetA Non-Intrusive Tooling to ExtendMetamodelsFrédéricMadiot, Mia-SoftwareGrégoireDupé, Mia-Software

2. Why to extend ?

3. Why to extend ?

4. Add new attributes

5. Add new operations

6. Add new links

7. Add new subtypes

8. Addnon-semanticpropertiesIconLabel colordependingon the number of booksIcondependingon the category

9. Extensibility limitationsYou can’talwayschange the metamodel

10. Extensibility limitationsExisting Instances can’t change their type

11. Extensibility limitationsYou can’tdynamicallycreate/load/unload extensionsCopyright © Michael Heston http://www.flickr.com/photos/hestonmichael

12. EMF FacetprojectAn non-intrusive metamodel extension toolinghttp://www.eclipse.org/modeling/emft/facet/Initial contribution fromMoDiscoFacetMetamodelextensibilityCustomizationGenericadditionalpropertiesQueryComputable values

13. Whatcanyou do with EMF Facet ?

14. Example: UML extension for SysML

15. Example: UML extension for SysMLAdditionalrelation

16. Example: Java extension for JPA

17. Example: Java extension for JPA

18. Example: Java extension for JPAAdditionalattribute

19. Example: Java extension for JUnitColorcalculateddynamicallyAdditionalattributes

20. Thankyou !Eclipse projectshttp://www.eclipse.org/MoDisco/http://www.eclipse.org/modeling/emft/facet/Companyhttp://www.mia-software.com/http://www.sodifrance.fr/Bloghttp://fmadiot.blogspot.com/