383 search results - page 21 / 77 » Query Containment for Conjunctive Queries with Regular Expre... |
VLDB
2006
ACM
14 years 8 months ago
2006
ACM
In this paper we study the following problem. Given a database and a set of queries, we want to find a set of views that can compute the answers to the queries, such that the amoun...
ADC
2009
Springer
14 years 3 months ago
2009
Springer
The paper presents the S.E.A.L. query language and interpreter for entity-association queries that allows such queries to be expressed in a much simpler way than in SQL. S.E.A.L (...
PODS
2008
ACM
14 years 8 months ago
2008
ACM
We study complexity and approximation of queries in an expressive query language for probabilistic databases. The language studied supports the compositional use of confidence com...
CIKM
2007
Springer
14 years 2 months ago
2007
Springer
Regular path queries (RPQ’s) are given by means of regular expressions and ask for matching patterns on labeled graphs. RPQ’s have received great attention in the context of s...
AAAI
2007
13 years 11 months ago
2007
The use of ontologies in various application domains, such as Data Integration, the Semantic Web, or ontology-based data management, where ontologies provide the access to large a...