Jump to content United States-English
HP.com Home Products and Services Support and Drivers Solutions How to Buy
» Contact HP

HP Labs home

Technical reports

» 

HP Labs

» Research
» News and events
» Technical reports
» About HP Labs
» Careers @ HP Labs
» Worldwide sites
» Downloads
Content starts here

 
Click here for full text: PDF

Computing Semantic Similarity Using Ontologies

Thiagarajan, Rajesh; Manjunath, Geetha; Stumptner, Markus
HP Laboratories

HPL-2008-87

Keyword(s): semantic web, emantics, atching, imilarity, ontology, user profiles, spreading activation networks

Abstract: Determining semantic similarity of two sets of words that describe two entities is an important problem in web mining (search and recommendation systems), targeted advertisement and domains that need semantic content matching. Traditional Information Retrieval approaches even when extended to include semantics by performing the similarity comparison on concepts instead of words/terms, may not always determine the right matches when there is no direct overlap in the exact concepts that represent the semantics. As the entity descriptions are treated as self-contained units, the relationships that are not explicit in the entity descriptions are usually ignored. We extend this notion of semantic similarity to consider inherent relationships between concepts using ontologies. We propose simple metrics for computing semantic similarity using spreading activation networks with multiple mechanisms for activation (set based spreading and graph based spreading) and concept matching (using bipartite graphs). We evaluate these metrics in the context of matching two user profiles to determine overlapping interests between users. Our similarity computation results show an improvement in accuracy over other approaches, when compared with human-computed similarity. Although the techniques presented here are used to compute similarity between two user profiles, these are applicable to any content matching scenario.

16 Pages

Additional Publication Information: Submitted to ISWC 08, the International Semantic Web Conference (ISWC), 2008, Karlsruhe, Germany.

External Posting Date: July 6, 2008 [Fulltext]. Approved for External Publication
Internal Posting Date: July 6, 2008 [Fulltext]

Back to Index

»Technical Reports

» 2009
» 2008
» 2007
» 2006
» 2005
» 2004
» 2003
» 2002
» 2001
» 2000
» 1990 - 1999

Heritage Technical Reports

» Compaq & DEC Technical Reports
» Tandem Technical Reports
Printable version
Privacy statement Using this site means you accept its terms Feedback to HP Labs
© 2009 Hewlett-Packard Development Company, L.P.