As in the last years the Ontology Matching (OM) workshop as ISWC has been a big success with more than 50 listeners and around 20 posters. The workshop day started in the morning with the presentation of technical papers. Amongst other interesting papers, Jerome Euzenat presented the paper "Ontology matching benchmarks: generation and evaluation". It explains a new way of generating benchmarks for ontology matching. In addition to the results discussed in the paper, some new results were included in the presentation that have been generated over the last weeks with help of SEALS technology.

In the afternoon, results of the Ontology Alignment Evaluation Initiative were presented. Cassia Trojahn started with an overview on this years procedure, showed preliminary results of OAEI 2011 (assisted by Christian Meilicke and Ondrej Svab-Zamazal) and talked about plans for the future, using the SEALS platform to its full extent. After this talk of the organizers, three tool developers had been chosen to present the architecture of their systems and talked about implemented matching techniques.

The workshop ended with a discussion and wrap-up that touched several interesting points, such as new datasets that might be used for further evaluations. Ernesto Jiminez Ruiz presented some ideas related to the use of large biomedical ontologies in a poster. A group of people from http://www.dmo-foundry.org/ raised the idea to match several ontologies from the domain of Data Mining. We will stay in contact with both groups to support them in increasing the quality of further OAEI campaigns.

 ... and note also that there will be an OAEI 2011.5 at ESWC 2012. Final deadline for tool updates or new tool submissions will probably be March 2012, more details will follow!

Precision/recall triangular graph for three SEALS supported tracks: benchmark2 (best five matchers, triangulars), anatomy (best four matchers, circles) and conference (best eight matchers, squares). Horizontal line depicts level of precision/recall while values of F-measure are depicted by areas bordered by corresponding lines for F-measure=0.[5|6|7].