UML-TF. Un profil UML pour la représentation des faits temporels

Querying and Manipulating Temporal Databases

“…Based on a model that integrates time in a native manner [5,26], we then have proposed temporal extension to the standard SQL3 by new keywords. These keywords are used to define several versions of temporal operators to SQL, and then to perform many "forms" of querying and updating temporal DBs.…”

“…In the following section, we review on the specification of temporal facts in accordance with the model on which we are based [5,26], and we continue in the other two sections to present elements of the extension on querying and manipulation.…”

“…UML-TF is an UML profile dedicated to the modelling of temporal facts [5]. With this profile, modelling is made through the various levels of abstraction proposed by the MDA (Model Driven Architecture) approach, while expressing the temporal dimensions of any facts by stereotypes that we classify into three categories: valid-time stereotypes, transaction-time stereotypes and bitemporal stereotypes.…”

“…Each abstract stereotype is characterized by metaproperties to be able to express, for each stereotyped element, timestamps properties as well as constraints on these timestamps or on the modelled temporal instances [26]. Further details concerning the definition of the UML-TF stereotypes can be found in [5].…”

“…Thus, after a general presentation of the state of the art, we begin by recalling the specification of temporal facts with the UML-TF profile [5], then we chain with proposals to a direct and simplified expression of querying and manipulation. A complete example from a real application will serve as a medium of illustration throughout the presentation.…”