Aggregate Queries over Ontologies

Proc. of the 2nd Int. Workshop on Ontologies and Inf. Systems for the Semantic Web (ONISW 2008). 2008.

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 the ontology language DL-LiteA .

@inproceedings{ONISW-2008,
   title = "Aggregate Queries over Ontologies",
   year = "2008",
   author = "Diego Calvanese and Evgeny Kharlamov and Werner Nutt and
Camilo Thorne",
   booktitle = "Proc. of the 2nd Int. Workshop on Ontologies and Inf. Systems
for the Semantic Web (ONISW 2008)",
   pages = "97--104",
   doi = "10.1145/1458484.1458500",
}