448 search results - page 4 / 90 » Queries and Constraints on Semi-structured Data |
EDBT
2012
ACM
12 years 1 months ago
2012
ACM
In this paper we consider the problem of answering queries using views, with or without ontological constraints, which is important for data integration, query optimization, and d...
SEMWEB
2010
Springer
13 years 8 months ago
2010
Springer
This paper presents our work on supporting evaluation of integrity constraint issues in semantic web instance data. We propose an alternative semantics for the ontology language, i...
IJCAI
2003
14 years 6 days ago
2003
In data-integration systems, information sources often have various constraints such as “all houses stored at a source have a unique address.” These constraints are very usefu...
BTW
2003
Springer
14 years 4 months ago
2003
Springer
Dissemination systems are used to route information received from many publishers individually to multiple subscribers. The core of a dissemination system consists of an efficient...
GLOBE
2008
Springer
13 years 12 months ago
2008
Springer
This paper addresses the problem of data integration in a P2P environment, where each peer stores schema of its local data, mappings between the schemas, and some schema constraint...