383 search results - page 18 / 77 » Query Containment for Conjunctive Queries with Regular Expre... |
KDD
2005
ACM
14 years 9 months ago
2005
ACM
We present an algorithm for mining tree-shaped patterns in a large graph. Novel about our class of patterns is that they can contain constants, and can contain existential nodes w...
UML
2001
Springer
14 years 1 months ago
2001
Springer
UML is the de-facto standard language for Object-Oriented analysis and design of information systems. Persistent storage and extraction of data in such systems is supported by dat...
VL
2000
IEEE
14 years 1 months ago
2000
IEEE
The accurate formulation of boolean expressions is a notorious problem in programming languages and database query tools. This paper studies the ways that untrained users naturall...
DLOG
2008
13 years 11 months ago
2008
Answering queries posed over knowledge bases is a central problem in knowledge representation and database theory. In databases, query containment is one of the important query op...
PODS
1998
ACM
14 years 26 days ago
1998
ACM
We study the complexity of the problem of answering queries using materialized views. This problem has attracted a lot of attention recently because of its relevance in data integ...