617 search results - page 100 / 124 » Semantic queries in databases: problems and challenges |
AAAI
2010
13 years 10 months ago
2010
In many data-centric applications, it is desirable to use OWL as an expressive schema language with which one expresses constraints that must be satisfied by instance data. However...
ICCS
2009
Springer
14 years 3 months ago
2009
Springer
Abstract. In knowledge bases, the open world assumption and the ability to express variables may lead to an answer redundancy problem. This problem occurs when the returned answers...
DASFAA
2010
IEEE
14 years 3 days ago
2010
IEEE
We address the problem of skyline query processing for a count-based window of continuous streaming data that involves both totally- and partially-ordered attribute domains. In thi...
JBCS
2010
13 years 3 months ago
2010
Schema matching is a fundamental issue to many database applications, such as query mediation and data warehousing. It becomes a challenge when different vocabularies are used to r...
KRDB
1998
13 years 10 months ago
1998
We present a semantic caching approach for optimizing the performance of information mediators. A critical problem with information mediators, particularly those gathering and int...