Learning Ontologies

Learning Web Service domain ontologies

WonderWeb pioneered the use of ontology learning tools in the context of Web services by investigating and (partially) answering a set of fundamental questions. The most important observation was that the textual sources have a low grammatical quality and that they use language in a specific way (i.e., they employ a sublanguage). These characteristics constrain the choice of approaches that can be used. Also, the concepts that should be extracted, should reflect both static (domain concepts) and procedural (functionalities that Web services offer) aspects of the domain.

This situation is different from current ontology learning where only static knowledge is extracted. Therefore existing methods have to be adapted. In addition, important limitations still exist which will be tackled in TAO. In particular, the methods only extract simple information about services (their parameters and functionality), while much more can be learned form these descriptions. Such information can be extracted by extending the current methods or by considering other sources as well (e.g., recent experiments have shown that WSDL descriptions also contain valuable and often more precise and detailed information than the textual documentations). Another challenge is combining the knowledge extracted from different sources.

Related Publications

Mladenic, Dunja, Grobelnik, Marko, Fortuna, Blaz, "What Semantic Web researchers need to know about Machine Learning?", SWAP 2007, December 18-20, 2007. Video.

Mladenic, Dunja, Grobelnik, Marko, Fortuna, Blaz, "What Semantic Web researchers need to know about Machine Learning?", In Proceedings of the International Semantic Web Conference (ISWC 2007), Busan, Korea, November 11-15, 2007.

Grcar, Miha, Grobelnik, Marko and Mladenic, Dunja. "Using Text Mining and Link Analysis for Software Mining". ECML/PKDD, September, 2007. , Presentation.

Mladenić, Dunja, Grobelnik, Marko. "Evaluation of semi-automatic ontology generation in real-world setting". In Proceedings of the 29th International Conference on Information Technology Interfaces, Cavtat/Dubrovnik, Croatia, June 25-28, 2007. .

Ilijašić Mišić, Ivana, Kovačič, Božidar, Mohorić, Tamara, Mladenić, Dunja, Fortuna, Blaž, Grobelnik, Marko. "User study of ontology generation tool". In Proceedings of the 29th International Conference on Information Technology Interfaces, Cavtat/Dubrovnik, Croatia, June 25-28, 2007. .

Fortuna, Blaz, Grobelnik, Marko and Mladenic, Dunja. "OntoGen: Semi-automatic Ontology Editor". HCI International 2007, Beijing, July 2007. .

Fortuna, B. and Grobelnik, M. and Mladenic, D. "Semi-automatic Ontology Construction System". AAAI 2007, Vancouver, July 2007. .