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Extending Web-Protégé to Support Reasoning

Extending Web-Protégé to Support Reasoning. Alok D Sagar T. Web ProtegE. Lightweight, web-based ontology editor. Open source, well documented , thus extending it would be easy

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Extending Web-Protégé to Support Reasoning

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  1. Extending Web-Protégé to Support Reasoning Alok D Sagar T

  2. Web ProtegE • Lightweight, web-based ontology editor. • Open source, well documented, thus extending it would be easy • Built with a goal of supporting the process of collaborative ontology development in a web environment.

  3. Motivation: What it Lacks • Some cross Navigation, adding equivalence • Reasoning !! • Ontology Versioning* • Reasoning an ontology in Web Protégé requires • Exporting to a local file • Reasoning locally • Making required changes • Uploading the extended version

  4. Approaches • Restricting Write Access: • Lock the existing ontology when reasoning is been performed. • When ontology is been reasoned, no other user can be allowed to edit it i.e. No multiuser write access. • Reasoning Current Snapshot: • Reason the snapshot of the ontology currently available. • However, current user might lose out on updates someone else is making to the same ontology simultaneously. • Tradeoff

  5. TABS PORTLETS Configuration File

  6. Loosely Coupled System Architecture Java API Pellet REST-ful API Request: method=InfH&path=xxx Pellet Manager Request: OntoPath and Method Response Call Rest Web service for Reasoning Reasoning Authentication Module Controller Web Protege Save Inferred Hierarchy & Snapshot Snapshot Local Repository

  7. Methodology • Google Web Toolkit: • Google Web Toolkit (GWT) is a development toolkit for building and optimizing complex browser-based applications. • The GWT SDK provides a set of core Java APIs and Widgets. These allow you to write AJAX applications in Java and then compile the source to highly optimized JavaScript that runs across all browsers • Create REST API and invoke Pellet. • Local Storage for inferred hierarchy and ontology snapshots. • GWT User Interface.

  8. Demo

  9. Future Work • Incremental reasoning :ability of the reasoner to process updates (additions or removals) applied to an ontology without having to perform all the reasoning steps from scratch. • Pellet supports two different incremental reasoning techniques: incremental consistency checking and incremental classification. • However, lack of support for OWL API forced us to confine the approach to reasoning.

  10. Related Work & Evaluation • As far as Online Reasoning is concerned, no known system is available. • The comparison between Standard Reasoning Vs Incremental Reasoning Will have to wait till support for OWL-API is provided. • So the only other evaluation aspect would be the with the manual approach used, that of exporting the Ontology.

  11. Conclusion • Reasoning Capability to Web Protégé added as portlets • To invoke Pellet Reasoner (As a REST WS) that offers • Inferred Hierarchy • Consistency Checking • Save and Retrieve • Snapshots of Ontology • Inferred Hierarchy • The plan would be • Testing with more Ontologies • Little more work on the UI part • Send it over to Web Protégé guys and hopefully it gets incorporated at some point 

  12. Thank you !

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