588 search results - page 23 / 118 » Positive higher-order queries |
136
Voted
ATAL
2003
Springer
15 years 5 months ago
2003
Springer
Personalized information agents can help overcome some of the limitations of communal Web information sources such as portals and search engines. Two important components of these...
112
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AMW
2009
15 years 2 months ago
2009
Abstract. Rewriting of conjunctive queries using views has many applications in database and data integration. We investigate ways to improve performance of rewriting and propose a...
114
Voted
DEXA
2003
Springer
15 years 7 months ago
2003
Springer
The importance of location prediction is rapidly increasing with the current trend of database applications in mobile computing environment. However, current personal communicatio...
110
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SSDBM
2003
IEEE
15 years 7 months ago
2003
IEEE
— Many novel spatio-temporal applications deal with moving objects. In such environments, a database typically maintains the initial position and the moving function for each obj...
126
Voted
PODS
2008
ACM
16 years 1 months ago
2008
ACM
We present a formal framework for capturing the provenance of data appearing in XQuery views of XML. Building on previous work on relations and their (positive) query languages, w...