OntoFarm Project

This page is deprecated and no longer updated. For its new version see http://owl.vse.cz:8080/ontofarm/

Description

This small-sized project of KEG aims at developing a collection of richly axiomatised 'parallel' ontologies in OWL and carrying out various experiments on them. All ontologies model the same domain, that of conference organisation, based on different conferences and, especially, conference support tools. Most ontologies contain some modelling errors, and reflect different conceptualisations of the same domain, this way simulating 'real-world heterogeneity' of semantic web ontologies.

All ontologies can currently be downloaded from the site of the track of OAEI 2010.

Contributions to the collection are warmly welcome!

The project achieved the following results (as of July 2009, update to come!):

• By July 2009 a number of experiments on the OntoFarm collection has been reported in literature; see for example [3,4,5,6,7,8,9].
• In 2009, the collection (the same 15 ontologies as before) is again being used for a track of OAEI 2009; this time however without a 'consensus building workshop'.
• During 2008-2009, reference mapping has been manually created for most pairs of ontologies in the collection.
• In 2008, the enlarged collection (15 ontologies) was again used for a track of OAEI 2008; there was again a 'consensus building workshop' at OM'07 in Karlsruhe. A new aspect was consideration of application-specific correspondences in addition to generic ones.
• In 2007, the enlarged collection (14 ontologies) was again used for a track of OAEI 2007; there was again a 'consensus building workshop' at OM'07 in Busan.
• In Spring 2006, the enlarged collection (10 ontologies) was invited for a track of OAEI 2006; in Summer 2006, there were several submissions to this track, which were subsequently discussed within a 'consensus building workshop' at the ISWC 2006 Ontology matching workshop in Athens, Georgia.
• In early 2006 the OntoFarm team itself carried out mapping experiments over the collection, which focused on pattern-aware association rule mining [3] and on combining different mapping methods via Bayesian networks [2]
• In Autumn 2005, there was a start-up collection, and an HTML-based application was built on its top, which linked several third-party reasoning services (simple form of automatic alignment, distributed DL reasoning) [1].

People

• Ondřej Šváb-Zamazal (PhD student, principal administrator of the collection)
• Vojtěch Svátek (senior collaborator, PhD advisor)
• Christian Meilicke and Heiner Stuckenschmidt from University of Mannheim (systematic experiments on the collection)

The project has been partially supported by several research projects:

• IST FP6-507482, Knowledge Web Network of Excellence (Workpackage 2.2 Heterogeneity)
• Internal Grant Agency of University of Economics, Prague, no.26/05 ``Methods and tools for ontological engineering''
• Internal Grant Agency of University of Economics, Prague, no.12/06 ``Integration of approaches to ontological engineering: design patterns, mapping and mining''
• Internal Grant Agency of University of Economics, Prague, no.20/07 ``Combination and comparison of ontology mapping methods and systems''
• Internal Grant Agency of University of Economics, Prague, no.20/08 ``Evaluating and matching ontologies via patterns''.

Selected Bibliography

1. Svab O., Svatek V., Berka P., Rak D., Tomasek P.: OntoFarm: Towards an Experimental Collection of Parallel Ontologies. In: Poster Track of ISWC 2005, Galway. Download.
2. Svab O., Svatek V.: Combining Ontology Mapping Methods Using Bayesian Networks. In: International Workshop on Ontology Matching collocated with the 5th International Semantic Web Conference (ISWC-2006), November 5, 2006: GA Center, Athens, Georgia, USA. Download.
3. Svab O., Svatek V., Stuckenschmidt H.: A Study in Empirical and `Casuistic' Analysis of Ontology Mapping Results. In: Proc. 4th European Semantic Web Conference (ESWC-2007), Innsbruck, 2007. Draft; final version will be available via SpringerLink.
4. Meilicke C., Stuckenschmidt H., Tamilin A.: Repairing Ontology Mappings. In: AAAI 2007: 1408-1413.
5. Svab-Zamazal O., Svatek V., Meilicke C., Stuckenschmidt H.: Testing the Impact of Pattern-Based Ontology Refactoring on Ontology Matching Results. In: OM-08, Karlsruhe.
6. Meilicke C., Volker J., Stuckenschmidt H.: Learning Disjointness for Debugging Mappings between Lightweight Ontologies. In: EKAW-08, Acitrezza.
7. Meilicke C., Stuckenschmidt H., Svab-Zamazal O.: A Reasoning-Based Support Tool for Ontology Mapping Evaluation. In: ESWC-2009, Crete.
8. Eckert K., Meilicke C., Stuckenschmidt H.: Improving Ontology Matching Using Meta-level Learning. In: ESWC-2009, Crete.
9. Svab-Zamazal O., Svatek V.: Empirical Knowledge Discovery over Ontology Matching Results. In: IRMLeS-09 workshop at ESWC-2009, Crete.