5130 search results - page 30 / 1026 » Constraint Query Languages |
WEBI
2007
Springer
14 years 5 months ago
2007
Springer
The paper addresses a problem of combining XML querying with ontology reasoning. We present an extension of a rule-based XML query and transformation language Xcerpt. The extensio...
GVD
2009
13 years 8 months ago
2009
Evaluating a traditional database query against a data tuple returns a true on match and a false on mismatch. Unfortunately, there are many application scenarios where such an eva...
VL
2009
IEEE
14 years 5 months ago
2009
IEEE
In many domains, decision makers want to find and understand patterns of events as these patterns often give insight into the causal relationships among events. Current systems to...
ICDT
2009
ACM
14 years 11 months ago
2009
ACM
The class of unions of conjunctive queries (UCQ) has been shown to be particularly well-behaved for data exchange; its certain answers can be computed in polynomial time (in terms...
ADC
1994
Springer
14 years 3 months ago
1994
Springer
We present a proposed query language for extended entity relationship schemas. The language improves on previous proposals by using only concepts explicitly in a given schema. It ...