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A Survey of the Web Ontology Landscape
Taowei David Wang1, Bijan Parsia2, and James Hendler1
1Department of Computer Science, University of Maryland, College Park, MD 20742, USA
tw7@cs.umd.edu
hendler@cs.umd.edu
2The University of Manchester, UK
bparsia@cs.man.ac.uk
Abstract. We survey nearly 1300 OWL ontologies and RDFS schemas. The collection of statistical data allows us to perform analysis and report some trends. Though most of the documents are syntactically OWL Full, very few stay in OWL Full when they are syntactically patched by adding type triples. We also report the frequency of occurrences of OWL language constructs and the shape of class hierarchies in the ontologies. Finally, we note that of the largest ontologies surveyed here, most do not exceed the description logic expressivity of 
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LNCS 4273, p. 682 ff.
lncs@springer.com
© Springer-Verlag Berlin Heidelberg 2006