7607 search results - page 175 / 1522 » Querying data provenance |
198
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AMW
2009
15 years 7 months ago
2009
We investigate the space requirements for summaries needed for maintaining exact answers to aggregate queries over histories of relational databases. We show that, in general, a su...
166
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SDMW
2005
Springer
16 years 13 hour ago
2005
Springer
To avoid insider attacks one cannot rely on access control to protect a database scheme. Encrypting the database is a better option. This paper describes a working prototype of an ...
176
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ICGI
2010
Springer
15 years 7 months ago
2010
Springer
This paper presents an efficient algorithm that identifies a rich subclass of multiple context-free languages in the limit from positive data and membership queries by observing wh...
212
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BMCBI
2007
15 years 6 months ago
2007
Background: The Stanford Tissue Microarray Database (TMAD) is a repository of data serving a consortium of pathologists and biomedical researchers. The tissue samples in TMAD are ...
207
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CORR
2011
Springer
15 years 1 months ago
2011
Springer
Contemporary use of the term ’intension’ derives from the traditional logical doctrine that an idea has both an extension and an intension. In this paper we introduce an intens...