3151 search results - page 148 / 631 » Using query term order for result summarisation |
208
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SIGMOD
2005
ACM
16 years 4 months ago
2005
ACM
We give semantic characterizations of the expressive power of navigational XPath (also called Core XPath) in terms of first order logic. XPath can be used to specify sets of nodes...
238
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SIGMOD
2008
ACM
16 years 4 months ago
2008
ACM
Supporting ranking queries in database systems has been a popular research topic recently. However, there is a lack of study on supporting ranking queries in data warehouses where...
135
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AMAI
2005
Springer
15 years 4 months ago
2005
Springer
Mediator systems integrate distributed, heterogeneous and autonomous data sources, but their e ective use requires the solution of hard query optimization problems. This is usuall...
146
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TREC
2003
15 years 5 months ago
2003
In our entry to the new HARD track, we have investigated two methods of interactively refining user search formulations. One method consists of asking the user to select a number ...
155
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PDPTA
1996
15 years 5 months ago
1996
The problem of eciently retrieving and ranking documents from a huge collection according to their relevance to a research topic is addressed. A broad class of queries is de ned a...