Aggregate queries over ontologies

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Aggregate queries over ontologies
Answering queries over ontologies is an important issue for the Semantic Web. Aggregate queries were widely studied for relational databases but almost no results are known for aggregate queries over ontologies. In this work we investigate the latter problem. We propose syntax and semantics for epistemic aggregate queries over ontologies and study query answering for MAX, MIN, COUNT, CNTD, SUM, AVG queries for an ontology language DL-LiteA. Categories and Subject Descriptors H.2.3 [Languages]: Query languages; H.4 [Information Systems Applications]: Miscellaneous General Terms Syntax, Semantics, Algorithms Keywords Aggregate Queries, Incomplete Information, Ontology Languages, Description Logic
Diego Calvanese, Evgeny Kharlamov, Werner Nutt, Ca
Added 12 Oct 2010
Updated 12 Oct 2010
Type Conference
Year 2008
Where CIKM
Authors Diego Calvanese, Evgeny Kharlamov, Werner Nutt, Camilo Thorne
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