Title :
Constraints in generalization structures in conceptual database schemes
Author :
Contreras, Ricardo ; Campos, Didier
Abstract :
We introduce two types of constraints on generalization structures in conceptual database schemes: non exclusive cardinality and non exhaustive cardinality constraints. We present some of the problems to express these constraints in Batini´s EER model (C. Batini et al., 1994), and we explain how the expansion of this model through the addition of new new constraints generating rules may enhance the scheme legibility and expressiveness
Keywords :
database theory; entity-relationship modelling; relational algebra; EER model; conceptual database schemes; constraints; expressiveness; generalization structures; non exclusive cardinality; non exhaustive cardinality constraints; rule generation; scheme legibility; Electrical capacitance tomography; Spatial databases; Tellurium;
Conference_Titel :
Computer Science, 1998. SCCC '98. XVIII International Conference of the Chilean Society of
Conference_Location :
Antofogasta
Print_ISBN :
0-8186-8616-2
DOI :
10.1109/SCCC.1998.730800
