1. Ontologies and Lexical Semantic Networks, Their Editing and Browsing Pavel Smrž and Martin Povolný {smrz,xpovolny}@fi.muni.cz }@fi.muni.cz Faculty of Informatics, Masaryk University in Brno, Czech Republic

2. Outline Motivation – the Semantic Web, metadata, thesauri and ontologies Motivation – the Semantic Web, metadata, thesauri and ontologies The role of W3C standards – XML, XSLT, RDF, OWL The role of W3C standards – XML, XSLT, RDF, OWL OASIS – Ontology Authoring System based on DEB – Dictionary Editor and Browser OASIS – Ontology Authoring System based on DEB – Dictionary Editor and Browser Transformation of data to OWL Transformation of data to OWL Conclusions and future directions Conclusions and future directions

3. Motivation Future web – understandable by machines Future web – understandable by machines The key role of ontologies – common understanding of concepts and relation between them The key role of ontologies – common understanding of concepts and relation between them Transformations of existing resources Transformations of existing resources Emerging standards – RDF Schema, OWL Emerging standards – RDF Schema, OWL (Semi) automatic transformation to OWL by OASIS (Semi) automatic transformation to OWL by OASIS

4. System Architecture

5. Features of DEB OASIS is implemented as a client of DEB server OASIS is implemented as a client of DEB server DEB - open-source free-software Dictionary Editor and Browser based on XML-family standards DEB - open-source free-software Dictionary Editor and Browser based on XML-family standards native XML database native XML database efficient storage and retrieval, dynamic indexing efficient storage and retrieval, dynamic indexing full-text search full-text search consistency checks based on DTD, XML Schema, XSLT, RelaxNG consistency checks based on DTD, XML Schema, XSLT, RelaxNG

6. System Architecture (cont.) DEB Server is responsible for storage and retrieval of data. It consists of: DEB Server is responsible for storage and retrieval of data. It consists of: a program that converts XML data into binary representation a program that converts XML data into binary representation a library and a program that implement a specialized language for querying a library and a program that implement a specialized language for querying DEB is based on text indexing library FINLIB and retrieving module FINLIB DEB is based on text indexing library FINLIB and retrieving module FINLIB Users can modify the data views by supplying their own XSLT sheets Users can modify the data views by supplying their own XSLT sheets

7. OASIS Transformations OASIS uses XSLT for transforming selected parts of existing resources into OWL and also to transform arbitrary data into HTML for visualization purposes. (with the help of a HTML widget) OASIS uses XSLT for transforming selected parts of existing resources into OWL and also to transform arbitrary data into HTML for visualization purposes. (with the help of a HTML widget) It also benefits from the client-side caching of parsed entries in DOM and from the use of XPath for extraction of important parts of the entries It also benefits from the client-side caching of parsed entries in DOM and from the use of XPath for extraction of important parts of the entries Extension of the XSLT processor Extension of the XSLT processor

8. Extension of the XSLT processor XSLT sheets can request data from the server based on the entry being processed XSLT sheets can request data from the server based on the entry being processed Definition of a new schema deb:// (creation of a virtual space of XML documents that are results of the queries) Definition of a new schema deb:// (creation of a virtual space of XML documents that are results of the queries) Efficient processing of complex transformation rules Efficient processing of complex transformation rules

9. Conclusions and Future Directions Transformation of WordNet data into OWL based on defined rules Transformation of WordNet data into OWL based on defined rules XPath evaluation as a part of the server protocol XPath evaluation as a part of the server protocol Metadata support Metadata support Data versioning Data versioning Three-layer architecture (thin clients) Three-layer architecture (thin clients)