152 search results - page 20 / 31 » Semantic Integrity Constraints for Spatial Databases |
176
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ICDE
2007
IEEE
16 years 1 months ago
2007
IEEE
In many applications it is important to find a meaningful relationship between the schemas of a source and target database. This relationship is expressed in terms of declarative ...
SIGMOD
1999
ACM
15 years 4 months ago
1999
ACM
In this paper we present a mechanism for translating constraint queries, i.e., Boolean expressions of constraints, across heterogeneous information sources. Integrating such syste...
WEBI
2001
Springer
15 years 4 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...
123
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WEBDB
2004
Springer
15 years 5 months ago
2004
Springer
Current approaches for answering queries with imprecise constraints require users to provide distance metrics and importance measures for attributes of interest. In this paper we ...
QSIC
2005
IEEE
15 years 5 months ago
2005
IEEE
Database application programs typically contain program units that use SQL statements to manipulate records in database instances. Testing the correctness of data manipulation by ...