505 search results - page 90 / 101 » Queries with Incomplete Answers over Semistructured Data |
VLDB
2005
ACM
15 years 3 months ago
2005
ACM
To answer user queries, a data integration system employs a set of semantic mappings between the mediated schema and the schemas of data sources. In dynamic environments sources o...
PVLDB
2010
14 years 8 months ago
2010
Users who are unfamiliar with database query languages can search XML data sets using keyword queries. Previous work has shown that current XML keyword search methods, although in...
AMW
2010
14 years 11 months ago
2010
Abstract. Inference control can guarantee confidentiality but is costly to implement. Access control can be implemented efficiently but cannot guarantee confidentiality. Hence, it ...
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SIGMOD
2007
ACM
15 years 9 months ago
2007
ACM
A large part of the data on the World Wide Web is hidden behind form-like interfaces. These interfaces interact with a hidden backend database to provide answers to user queries. ...
SIGMOD
2001
ACM
15 years 9 months ago
2001
ACM
Approximating the joint data distribution of a multi-dimensional data set through a compact and accurate histogram synopsis is a fundamental problem arising in numerous practical ...