14306 search results - page 278 / 2862 » Database System Concepts |
207
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IDEAS
2003
IEEE
15 years 12 months ago
2003
IEEE
In this concise paper, we present the Nested Relational Sequence Model (NRSM), which is an extension of the Nested Relational Data Model in order to handle XML data. We also intro...
293
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VLDB
2008
ACM
16 years 6 months ago
2008
ACM
Abstract In this article, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated wit...
137
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PDIS
1994
IEEE
15 years 10 months ago
1994
IEEE
Existing federated database systems (FDBS) provide uniform access to multiple heterogeneous DBS, but do not enable objects to move across the DBS while retaining global identity. ...
175
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DKE
1998
15 years 6 months ago
1998
The issues of schema evolution and temporal object models are generally considered to be orthogonal and are handled independently. However, to properly model applications that nee...
215
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FODO
1998
Springer
15 years 11 months ago
1998
Springer
In object-oriented database systems (OODB) with logical OIDs, an OID index (OIDX) is needed to map from OID to the physical location of the object. In a transaction time temporal ...