Cross ontology query answering on the semantic web: an initial evaluation

Vanessa Lopez, Victoria Uren, Marta R. Sabou, Enrico Motta

Research output: Chapter in Book/Published conference outputConference publication


PowerAqua is a Question Answering system, which takes as input a natural language query and is able to return answers drawn from relevant semantic resources found anywhere on the Semantic Web. In this paper we provide two novel contributions: First, we detail a new component of the system, the Triple Similarity Service, which is able to match queries effectively to triples found in different ontologies on the Semantic Web. Second, we provide a first evaluation of the system, which in addition to providing data about PowerAqua's competence, also gives us important insights into the issues related to using the Semantic Web as the target answer set in Question Answering. In particular, we show that, despite the problems related to the noisy and incomplete conceptualizations, which can be found on the Semantic Web, good results can already be obtained.
Original languageEnglish
Title of host publicationK-CAP '09
Subtitle of host publicationproceedings of the fifth international conference on knowledge capture
Place of PublicationNew York, NY (US)
Number of pages8
ISBN (Print)978-1-60558-658-8
Publication statusPublished - 2009
Event5th international conference on knowledge capture - Redondo Beach, CA, United States
Duration: 1 Sept 20094 Sept 2009


Conference5th international conference on knowledge capture
Abbreviated titleK-CAP 2009
Country/TerritoryUnited States
CityRedondo Beach, CA


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