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OPALES Demonstration

OPALES Demonstration. CWI – Feb. 22 nd 2006. Antoine Isaac. OPALES. French Project (RIAM, 2001-2003) Partners: « Developers » INA (Coordinator) LIRMM (IHM, GC) CS « Users » CNRS (video library) MSH (humanities, communication) CNDP (educational material).

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OPALES Demonstration

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  1. OPALES Demonstration CWI – Feb. 22nd 2006 Antoine Isaac

  2. OPALES • French Project (RIAM, 2001-2003) • Partners: • « Developers » • INA (Coordinator) • LIRMM (IHM, GC) • CS • « Users » • CNRS (video library) • MSH (humanities, communication) • CNDP (educational material) Antoine Isaac – CWI Talk

  3. « Tools to share knowledge in educational/scientific communities » • Goals • Sharing and exploiting AV resources • Fitting the needs of various specific user communities • Approach • Accessing document via annotations • Similar to classical indexing approach Interpretation of AV content used for exploitation • Ensuring the relevance of annotation for communities and applications • Using points of view Antoine Isaac – CWI Talk

  4. Points of view • Exploitation of annotation/indexes needs semantic continuity • Shared interpretation/coherent manipulation for indexer/searcher/system • OPALES points of view • Mirror specific application/community needs • Embody annotation policies • Gather users who choose them for creating or filtering annotations • Thorough experiments with 2 points of view • Ethnology-oriented analysis of videos regarding childhood • Educational exploitation of geographic information films Antoine Isaac – CWI Talk

  5. Points of view and annotation/search policies • Free-text annotation and search • Natural interpretation of AV content • Form-based annotation and search • Predefined structure • Basic control (value lists) Antoine Isaac – CWI Talk

  6. OPALES Forms Antoine Isaac – CWI Talk

  7. Points of view and annotation/search policies • Free-text annotation and search • Natural interpretation of AV content • Form-based annotation and search • Predefined structure • Basic control (value lists) • Ontology-based annotation and search Antoine Isaac – CWI Talk

  8. Ontology-based annotation and search • Explicit and flexible structuring of index elements • Added value of relations for rich indexing Conceptual Graphs formalism Antoine Isaac – CWI Talk

  9. Ontology-based annotation Antoine Isaac – CWI Talk

  10. Ontology-based annotation and search • Explicit and flexible structuring of index elements • Control ensured by formal specifications • Inference • Taking into account (viewpoint-specific) implicit knowledge to link queries to indexes Cogitant CG inference engine Antoine Isaac – CWI Talk

  11. Problems of ontology-based approach • Complex indexing process • Difficult to get accustomed to • Especially for people not used to KR • Coupling design of complex ontological knowledge with use • Legitimate conceptualisation w.r.t. application and practice • Specification of formal inference knowledge Antoine Isaac – CWI Talk

  12. DOE ontology editor • Semi-informal semantics [Bachimont] • Differential principles inter-defining notions by similarities and differences • Meaning naturally linked to an application domain • Compatible with extraction of ontology elements from textual resources [Véronique Malaisé] • Compatible with further formalization Antoine Isaac – CWI Talk

  13. DOE http://opales.ina.fr/public [Bachimont, Isaac, Troncy] (now http://homepages.cwi.nl/~troncy/DOE/ !) Antoine Isaac – CWI Talk

  14. Indexing patterns • Determine relational template recurrent in aimed information practices • Dependent on point of view • Propose those structures to the indexer as a starting point for description Antoine Isaac – CWI Talk

  15. Indexing patterns: example (1) English Antoine Isaac – CWI Talk

  16. Antoine Isaac – CWI Talk

  17. Indexing patterns: example (3) English Antoine Isaac – CWI Talk

  18. Patterns and reasoning • Comparison index/query Pattern as an implicit pivotal structure, compensating for description/query variations • Inferring facts from pattern structure • Inferring pattern-fitting facts from different structure Antoine Isaac – CWI Talk

  19. Conclusion • Points of view as materialization of indexing and exploitation strategies • Knowledge-based tools • Expressivity, control and inference • Experimentation (two qualitative evaluations with domain users) shows that there are obstacles: • No familiarity of targeted users with formal techniques • Difficulty for the knowledge workers to design proper ontological resources for each point of view Antoine Isaac – CWI Talk

  20. Conclusion • Experimentation shows that approach is made feasible by: • Ontologies linked in quite a natural way to meanings and practices targeted by points of views • Differential principles help ontology designer’s work and final users’ understanding • Formalizing users needs by Indexing Patterns • Both for description and query • Also legitimates ontology designers’ work • Turning to “relational” reasoning for compensating variations [Remark: complexity goes now for KR engine] Techniques to ensuring semantic continuity in ontology-based indexing and search Antoine Isaac – CWI Talk

  21. THANK YOU ! Antoine Isaac – CWI Talk

  22. Back Childcare use pattern Antoine Isaac – CWI Talk

  23. Specialised index Back Antoine Isaac – CWI Talk

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