document: Debugging OWL ontologies As an increasingly large number of OWL ontologies become available on the Semantic Web and the descriptions in the ontologies become more complicated , finding the cause of errors becomes an extremely hard task even for experts . Existing ontology development environments provide some limited support , in conjunction with a reasoner , for detecting and diagnosing errors in OWL ontologies . Typically these are restricted to the mere detection of , for example , unsatisfiable concepts . We have integrated a number of simple debugging cues generated from our description logic reasoner , Pellet , in our hypertextual ontology development environment , Swoop . These cues , in conjunction with extensive undo\/redo and Annotea based collaboration support in Swoop , significantly improve the OWL debugging experience , and point the way to more general improvements in the presentation of an ontology to new users .
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