383 search results - page 37 / 77 » Query Containment for Conjunctive Queries with Regular Expre... |
EDOC
2003
IEEE
14 years 2 months ago
2003
IEEE
The Meta-Object Facility (MOF) provides a standardised framework for object-oriented models. An instance of a MOF model contains objects and links whose interfaces are entirely de...
ICDE
2006
IEEE
14 years 10 months ago
2006
IEEE
We present MiniCount, the first efficient sound and complete algorithm for finding maximally contained rewritings of conjunctive queries with count, using conjunctive views with c...
OWLED
2008
13 years 10 months ago
2008
Abstract. We present Owlgres, a DL-Lite reasoner implementation written for PostgreSQL, a mature open source database. Owlgres is an OWL reasoner that provides consistency checking...
WAIM
2004
Springer
14 years 2 months ago
2004
Springer
Selectivity estimation of path expressions in querying XML data plays an important role in query optimization. A path expression may contain multiple branches with predicates, each...
APWEB
2005
Springer
14 years 2 months ago
2005
Springer
Summarizing topological relations is fundamental to many spatial applications including spatial query optimization. In this paper, we examine the selectivity estimation for range w...