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181
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WEBI
2001
Springer
15 years 11 months ago
2001
Springer
In the proposed data model for XML databases, an XML element is directly represented as a ground (variable-free) XML expression—a generalization of an XML element by incorporatio...
193
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BMCBI
2006
15 years 7 months ago
2006
Background: Bacterial typing schemes based on the sequences of genes encoding surface antigens require databases that provide a uniform, curated, and widely accepted nomenclature ...
189
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BMCBI
2006
15 years 7 months ago
2006
Background: Molecular biologists work with DNA databases that often include entire genomes. A common requirement is to search a DNA database to find exact matches for a nondegener...
153
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ICDT
1990
ACM
15 years 11 months ago
1990
ACM
Ordinary logical implication is not enough for answering queries in a logic database, since especially negative information is only implicitly represented in the database state. M...
258
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SIGMOD
2007
ACM
16 years 7 months ago
2007
ACM
Optimizing SQL subqueries has been an active area in database research and the database industry throughout the last decades. Previous work has already identified some approaches ...