7593 search results - page 453 / 1519 » Querying XML Databases |
208
click to vote
DLOG
2011
14 years 10 months ago
2011
We show that, although conjunctive queries over OWL 2 QL ontologies are reducible to database queries, no algorithm can construct such a reduction in polynomial time without changi...
199
click to vote
SIGMOD
2010
ACM
15 years 11 months ago
2010
ACM
Many web queries seek information about named entities (such as products or people). Web search engines federate such entity-oriented queries to relevant structured databases; the...
184
click to vote
ICDE
2007
IEEE
16 years 1 months ago
2007
IEEE
Over the years, the notion of transactions has become synonymous with providing fault-tolerance, reliability and robustness to database systems. However, challenges arise when we ...
174
click to vote
PODS
2003
ACM
16 years 7 months ago
2003
ACM
In this paper we consider general path constraints for semistructured databases. Our general constraints do not suffer from the limitations of the path constraints previously stud...
216
click to vote
FOIKS
2004
Springer
16 years 7 days ago
2004
Springer
Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...