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CIKM
2008
Springer
13 years 9 months ago
2008
Springer
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 ag...
ASWC
2006
Springer
13 years 11 months ago
2006
Springer
The Web Ontology Language (OWL), which is a Description Logic based ontology language, is widely used to represent formal definitions of vocabularies for domain knowledge, especial...
RTA
2000
Springer
13 years 11 months ago
2000
Springer
Parallelism constraints are logical descriptions of trees. Parallelism constraints subsume dominance constraints and are equal in expressive power to context unification. Paralleli...
DLOG
2011
12 years 11 months ago
2011
W3C currently extends the SPARQL query language with so-called entailment regimes, which define how queries are evaluated using logical entailment relations. We describe a sound a...
ACSC
2007
IEEE
14 years 1 months ago
2007
IEEE
A web service is programmatically available application logic exposed over Internet. With the rapid development of e-commerce over Internet, web services have attracted much atten...