1192 search results - page 91 / 239 » Symbolic Query Exploration |
114
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ICEIS
2009
IEEE
15 years 8 months ago
2009
IEEE
In an information retrieval system, a thesaurus can be used for query expansion, i.e. adding words to queries in order to improve recall. We propose a semi-automatic and interactiv...
140
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ICDT
2007
ACM
15 years 8 months ago
2007
ACM
Query containment is a fundamental problem of databases. Given two queries q1 and q2, it asks whether the set of answers to q1 is included in the set of answers to q2 for any datab...
133
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VLDB
2004
ACM
15 years 7 months ago
2004
ACM
XML languages, such as XQuery, XSLT and SQL/XML, employ XPath as the search and extraction language. XPath expressions often define complicated navigation, resulting in expensive...
WEBI
2009
Springer
15 years 6 months ago
2009
Springer
Clickthrough rate and cost-per-click are known to be among the factors that impact the rank of an ad shown on a search result page. Hence, search engines can benefit from estimat...
109
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SIGMOD
1999
ACM
15 years 6 months ago
1999
ACM
We explore the execution of queries with client-site userdefined functions (UDFs). Many UDFs can only be executed at the client site, for reasons of scalability, security, confide...