TY - GEN
T1 - Aggregate queries over ontologies
AU - Calvanese, Diego
AU - Kharlamov, Evgeny
AU - Nutt, Werner
AU - Thorne, Camilo
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
KW - Aggregate queries
KW - Description logic
KW - Incomplete information
KW - Ontology languages
UR - http://www.scopus.com/inward/record.url?scp=70349421346&partnerID=8YFLogxK
U2 - 10.1145/1458484.1458500
DO - 10.1145/1458484.1458500
M3 - Contribución a la conferencia
AN - SCOPUS:70349421346
SN - 9781605582559
T3 - International Conference on Information and Knowledge Management, Proceedings
SP - 97
EP - 104
BT - Proc. of the 2nd International Workshop on Ontologies and Information Systems for the Semantic Web, ONISW'08, Co-located with the 17th ACM Conference on Information and Knowledge Management, CIKM'08
T2 - 2nd International Workshop on Ontologies and Information Systems for the Semantic Web, ONISW'08, Co-located with the 17th ACM Conference on Information and Knowledge Management, CIKM'08
Y2 - 26 October 2008 through 30 October 2008
ER -