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What is Variant

Chapter 10
Handbook of Research on Innovations in Database Technologies and Applications: Current and Future Trends
Applied to many structural elements of a database (class, table, constraint etc), it is used to define mutable elements or elements whose modification is highly probable. An invariant is the opposite of a variant, i.e., an element not involved in the evolution of the database. Variants of database objects or object properties can be modified and can generate versions.
Published in Chapter:
Database Engineering Supporting the Data Evolution
Luiz Camolesi Júnior (State University of Campinas (UNICAMP), Brazil) and Marina Teresa Pires Vieira (Methodist University of Piracicaba – UNIMEP, Brazil)
Copyright: © 2009 |Pages: 9
DOI: 10.4018/978-1-60566-242-8.ch010
Abstract
Researchers in several areas (sociology, philosophy and psychology), among them Herbert Spencer and Abraham Maslow, attribute human actions resulting in continual environmental changes to the search for the satisfaction of individual and collective needs. In other fields of science, this behavior represents a challenge in ethical researches on concepts, methodologies and technologies aimed at optimizing and qualifying the actions involved in these continual changes to obtain better results.
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