412 search results - page 16 / 83 » Aggregate queries over ontologies |
154
Voted
AAAI
2007
15 years 7 months ago
2007
Efficient query answering over ontologies is one of the most useful and important services to support Semantic Web applications. Approximation has been identified as a potential...
130
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CORR
2007
Springer
15 years 4 months ago
2007
Springer
We address the problem of answering Web ontology queries efficiently. An ontology is formalized as a Deductive Ontology Base (DOB), a deductive database that comprises the ontology...
134
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SSDBM
2006
IEEE
15 years 10 months ago
2006
IEEE
We consider an environment where a subscription system continuously evaluates pattern-based requests over unbounded sequential data. We propose an extension of the traditional pat...
137
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SAC
2008
ACM
15 years 4 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...
156
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COMAD
2008
15 years 6 months ago
2008
Answering aggregate queries like sum, count, min, max over regions containing moving objects is often needed for virtual world applications, real-time monitoring systems, etc. Sin...