Our seminar series is free and available for anyone to attend. Unless otherwise stated, seminars take place on Wednesday afternoons at 2pm in the Kilburn Building during teaching season.

If you wish to propose a seminar speaker please contact Antoniu Pop.


Instance Queries Relaxed by Concept Similarity Measures over Ontologies

  • Speaker:   Dr.  Anni-Yasmin Turhan  (Dresden University of Technology)
  • Host:   Uli Sattler
  • 26th June 2015 at 14:00 in Kilburn L.T. 1.4
In Description Logics (DL) ontologies, information is typically captured by clear-cut concepts. For many applications querying the knowledge base only by crisp concepts is too restrictive---precision of the query may be traded for a larger selection of answers. Concept similarity measures, which assess the similarity of two concepts by a number, can offer a controlled way of gradually relaxing a query concept within a user-specified limit.

In this talk we recapitulate the basics of Description Logics and investigate the task of instance query answering for DL ontologies using concepts relaxed by concept similarity measures. We identify relevant properties for the similarity measure and investigate computation algorithms for the description logic EL---regarding whether unfoldable or general Tboxes are used. For the case of general Tboxes we define a new family of concept similarity measures that take the full Tbox information into account, when assessing the similarity of concepts.
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