mesam a prot eg e plug in for the specialization of models
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MESAM Plug-in MESAM Plug-in Implementation Conclusion MESAM : A Prot eg e Plug-in for the Specialization of Models Nadjet Zemirline, Yolaine Bourda, Chantal Reynaud and Fabrice Popineau Supelec Gif-sur-Yvette, LRI Paris-Sud university

  1. MESAM Plug-in MESAM Plug-in Implementation Conclusion MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models Nadjet Zemirline, Yolaine Bourda, Chantal Reynaud and Fabrice Popineau Supelec Gif-sur-Yvette, LRI Paris-Sud university and Inria Saclay - France June 26 th , 2008 N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 1 / 17

  2. MESAM Plug-in MESAM Plug-in Implementation Conclusion Reuse generic platforms to create new systems Usually, the creator 1. comes with his own models and resources 2. would like to reuse the generic system over his resources → integrate his models and resources in the system − There are some problems, the creator • needs to translate his models into the specific format understood by the system • needs to translate all the instantiations of his models • .. → tedious and time-consuming − The goal is to allow the creator to reuse his models and his models instantiations without any change of format or vocabulary N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 2 / 17

  3. MESAM Plug-in MESAM Plug-in Implementation Conclusion Authoring Adaptive Hypermedia Systems using generic platforms (1) An adaptive Hypermedia System (AHS) can adapt its behavior to the needs of individual users Architecture of an AHS ... How to author AHS?? N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 3 / 17

  4. MESAM Plug-in MESAM Plug-in Implementation Conclusion Authoring Adaptive Hypermedia Systems using generic platforms (2) Usually, the creator comes with his user and domain models He can reuse an adaptation engine, if he • translates his resources in a format understood by the adaptation engine • integrates (without translation) his resources in the platform What do we mean by integration ?? N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 4 / 17

  5. MESAM Plug-in MESAM Plug-in Implementation Conclusion Specialization of generic models Two kinds of approaches 1. bottom-up approaches (based on instances): FCA-MERGE 2. top-down approaches (based on concepts): ODE-MERGE, PROMPT Specificities of the specialization process in the context of authoring systems 1. we have .. • Small models • The creator has a very good understanding of his models 2. we need .. • Mappings defined between generic and specific elements with a very high precision (100 % if possible) • ... Traditional approaches can not be applied − → Need new solutions !! N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 5 / 17

  6. MESAM Plug-in MESAM Plug-in Implementation Conclusion Agenda MESAM Plug-in Approach, new specialization process Functionality MESAM Plug-in Implementation MESAM plug-in Architecture Interaction with MESAM Plug-in Conclusion .. N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 6 / 17

  7. MESAM Plug-in MESAM Plug-in Implementation Conclusion New specialization process Our proposal a semi-automatic approach helping a creator in reusing his models Main aspects of this approach ... • A semi-automatic process • An help to support the definition of mappings between generic and specific models • An help to create consistent and relevant models integrating generic and specific models N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 7 / 17

  8. MESAM Plug-in MESAM Plug-in Implementation Conclusion Step 1: Specification of mappings between classes N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 8 / 17

  9. MESAM Plug-in MESAM Plug-in Implementation Conclusion Step 2: computational of additional mappings between classes Using patterns N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 9 / 17

  10. MESAM Plug-in MESAM Plug-in Implementation Conclusion Step 3: Structural verification (1) Two goals.. 1. automatically deduce mappings between properties 2. check the consistency of the new model created by the merging process → exploitation of structural knowledge, as: domain, range, cardinalities ... − N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 10 / 17

  11. MESAM Plug-in MESAM Plug-in Implementation Conclusion Step 3: Structural verification (2) Exploitation of structural knowledge is represented in a OWL meta-model: • some parts of the OWL meta-model were reused • new primitives were added (to represent the needed structural knowledge) → a generic solution (usable for any − model expressed in OWL) N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 11 / 17

  12. MESAM Plug-in MESAM Plug-in Implementation Conclusion Step 3: Structural verification (3) Deduction made using SWRL rules based on the meta-model N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 12 / 17

  13. MESAM Plug-in MESAM Plug-in Implementation Conclusion Step 4: Validation of suggestions 1. A creator specifies that .. - C is sub-class of A - D is sub-class of B 2. The system deduces that .. - P2 is probably a sub-property of P1 - P3 is probably an equivalent property of P1 N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 13 / 17

  14. MESAM Plug-in MESAM Plug-in Implementation Conclusion MESAM plug-in architecture Architecture includes two parts : A knowledge part, a processing part .. Some characteristics .. • implemented as a Protege plug-in • first tests were done in e-learning domain N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 14 / 17

  15. MESAM Plug-in MESAM Plug-in Implementation Conclusion MESAM workspace N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 15 / 17

  16. MESAM Plug-in MESAM Plug-in Implementation Conclusion MESAM workspace N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 15 / 17

  17. MESAM Plug-in MESAM Plug-in Implementation Conclusion MESAM workspace N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 15 / 17

  18. MESAM Plug-in MESAM Plug-in Implementation Conclusion MESAM workspace N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 15 / 17

  19. MESAM Plug-in MESAM Plug-in Implementation Conclusion Conclusion and Future work Results New approach for merging models, characterized by the • 8 patterns • expression of constraints by 25 rules • definition of a generic solution, based on a modified version of the OWL meta-model • precision of results Future works Thinking about several extensions for the plug-in, as • consideration of inconsistency problems and helping the creator in resolving them • consideration of other kinds of mappings than equivalence and specialization, like disjunctions • for AHS , help to personalize adaptation strategies supported by specialized domain and user models N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 16 / 17

  20. MESAM Plug-in MESAM Plug-in Implementation Conclusion Thank you! Questions? N.Zemirline MESAM : A Prot´ eg´ e Plug-in for the Specialization of Models 17 / 17

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