Details

Autor(en) / Beteiligte

• Motro, Amihai

Titel

Integrity = validity + completeness

Ist Teil von

• ACM transactions on database systems, 1989-12, Vol.14 (4), p.480-502

Ort / Verlag

New York, NY: ACM

Erscheinungsjahr

1989

Link zum Volltext

Quelle

ACM Digital Library

Beschreibungen/Notizen

• Database integrity has two complementary components: validity , which guarantees that all false information is excluded from the database, and completeness , which guarantees that all true information is included in the database. This article describes a uniform model of integrity for relational databases, that considers both validity and completeness. To a large degree, this model subsumes the prevailing model of integrity (i.e., integrity constraints). One of the features of the new model is the determination of the integrity of answers issued by the database system in response to user queries. To users, answers that are accompanied with such detailed certifications of their integrity are more meaningful. First, the model is defined and discussed. Then, a specific mechanism is described that implements this model. With this mechanism, the determination of the integrity of an answer is a process analogous to the determination of the answer itself.