1928 search results - page 67 / 386 » Integrity Constraints in OWL |
100
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TC
1997
15 years 1 months ago
1997
In this paper we describe a new approach to repairing violations of integrity constraints in databases with null values. By adopting basic concepts from model-based diagnosis, we ...
119
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SAC
2006
ACM
14 years 11 months ago
2006
ACM
Integrity constraints (ICs) play a key role in the definition of conceptual schemas. In the UML, ICs are usually specified as invariants written in the OCL. However, due to the hi...
SIGMOD
2008
ACM
14 years 11 months ago
2008
ACM
Tree pattern queries (TPQs) provide a natural and easy formalism to query tree-structured XML data, and the efficient processing of such queries has attracted a lot of attention. ...
FLAIRS
2004
15 years 1 months ago
2004
We discuss description and reasoning over regions. We have proposed a system called SRCC that integrates integration of spatial and semantic data. SRCC can describe and reason abo...
ACL
1998
15 years 1 months ago
1998
We introduce a first-order language for semantic underspecification that we call Constraint Language for Lambda-Structures (CLLS). A Astructure can be considered as a A-term up to...