950 search results - page 16 / 190 » Evaluation over thousands of queries |
VLDB
2005
ACM
14 years 2 months ago
2005
ACM
We study XML stream-specific schema-based optimization. We assume a widely-adopted automata-based execution model for XQuery evaluation. Criteria are established regarding what s...
CIKM
2004
Springer
14 years 2 months ago
2004
Springer
We explore join optimizations in the presence of both timebased constraints (sliding windows) and value-based constraints (punctuations). We present the first join solution named...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
Applications that monitor functions over rapidly and unpredictably changing data, express their needs as continuous queries. Our focus is on a rich class of queries, expressed as p...
CSL
2003
Springer
14 years 2 months ago
2003
Springer
Abstract. We study the succinctness of monadic second-order logic and a variety of monadic fixed point logics on trees. All these languages are known to have the same expressive p...
SEMWEB
2009
Springer
14 years 3 months ago
2009
Springer
The Web of Linked Data forms a single, globally distributed dataspace. Due to the openness of this dataspace, it is not possible to know in advance all data sources that might be r...