481 search results - page 30 / 97 » Approximate XML Query Answers |
SPIRE
2009
Springer
14 years 2 months ago
2009
Springer
We propose a method to evaluate queries using a last-resort semantic cache in a distributed Web search engine. The cache stores a group of frequent queries and for each of these qu...
SIGMOD
1999
ACM
14 years 4 days ago
1999
ACM
Computing multidimensional aggregates in high dimensions is a performance bottleneck for many OLAP applications. Obtaining the exact answer to an aggregation query can be prohibit...
MFCS
2009
Springer
14 years 2 months ago
2009
Springer
We study visibly pushdown automata (VPA) models for expressing and evaluating queries, expressed using MSO formulas, on words with a nesting structure (like XML documents). We deļ...
WEBDB
2009
Springer
14 years 2 months ago
2009
Springer
The question whether a given set of views, deļ¬ned by queries, can be used to answer another query, arises in several contexts such as query optimization, data integration and se...
VLDB
2001
ACM
14 years 8 months ago
2001
ACM
Approximate query processing has emerged as a costeffective approach for dealing with the huge data volumes and stringent response-time requirements of today's decision-suppo...