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SAC
2006
ACM
8 years 8 months ago
Transforming OCL constraints: a context change approach
Integrity constraints (ICs) play a key role in the definition of conceptual schemas. In the UML, ICs are usually specified as invariants written in the OCL. However, due to the hi...
Jordi Cabot, Ernest Teniente
DOCENG
2008
ACM
8 years 10 months ago
Improving query performance on XML documents: a workload-driven design approach
As XML has emerged as a data representation format and as great quantities of data have been stored in the XML format, XML document design has become an important and evident issu...
Rebeca Schroeder, Ronaldo dos Santos Mello
ER
1993
Springer
163views Database» more  ER 1993»
9 years 12 days ago
Using Conceptual Graph Theory to Support Schema Integration
Two major problems in schema integration are to identify correspondences between different conceptual schemas and to verify that the proposed correspondences are consistent with th...
Paul Johannesson
UML
2004
Springer
9 years 1 months ago
Determining the Structural Events That May Violate an Integrity Constraint
Any implementation of an information system must ensure that an operation is only applied if its execution does not lead to a violation of any of the integrity constraints defined ...
Jordi Cabot, Ernest Teniente
ER
2007
Springer
157views Database» more  ER 2007»
9 years 2 months ago
Perceived vs. Measured Quality of Conceptual Schemas: An Experimental Comparison
Frequently the behaviour of an information system is functionally correct, but it does not meet some quality criteria, such as completeness, consistency, and usability. One way to...
Samira Si-Said Cherfi, Jacky Akoka, Isabelle Comyn...
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