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A la primera part de l'article, es fa una exposició de l'anàlisi de precedències entre conjunts d'informació i, en particular, de l'anàlisi de derivabilitat, en base al model relacional de dades. A la segona part, s'aplica l'anàlisi de precedència a alguns problemes que es presenten durant el disseny de bases de dades. Aquest problemes són: definició i validació dels requeriments d'una base de dades; disseny del contingut de la base de dades; i disseny de la dinàmica dels processos d'afegir, derivar i esborrar informacions de la base de dades. S'explica un exemple concret al qual s'aplica els conceptes i els mètodes proposats.
In the first part of the paper the precedence analysis of information sets, and particularly the derivability analysis based on the relational model are presented. In the second part precedence analysis is applied to some problems that occur in data base design. These problems are: data base requirements definition and validation, data base contents design, and the design of the dynamics of the processes of adding, deriving and deleting data base informations. A particular sample to which are applied the proposed concepts and methods is explained.
Ciències de la computació, Classificació AMS::68 Computer science::68P Theory of data, Computer systems
Ciències de la computació, Classificació AMS::68 Computer science::68P Theory of data, Computer systems
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