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OPALES Demonstration

The OPALES project, coordinated by INA, aims to develop tools for optimizing the sharing and exploitation of audiovisual resources tailored to the needs of diverse educational and scientific communities. This talk by Antoine Isaac from CWI discusses innovative approaches to accessing documents via annotations, the significance of understanding user viewpoints, and the implementation of ontology-based indexing for thematic relevance. By exploring specific applications such as ethnology and educational content, the project seeks to address challenges in user annotation and improve semantic continuity in knowledge sharing.

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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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