| Sommario: | The cooperative construction of dataknowledge bases has recently had a significant impulse (see Wikipedia
[Wikipedia]). In cases in which dataknowledge quality and reliability are crucial, proposals of updateinsertiondeletion
need to be evaluated by experts. So far, no theoretical framework has been devised to model the semantics of update
proposalevaluation in the relational context. Since update proposalevaluation deeply involves the notion of time,
semantic approaches to temporal relational databases (specifically, BCDM [Jensen and Snodgrass 1996]) are the
starting point of a theoretical framework definition. In this paper, we propose BCDMPV, a semantic temporal relational
model that extends BCDM to deal with multiple updateinsertiondeletion proposals and with acceptances
ejections of
proposals themselves. We define the related data structures, manipulation operations and temporal relational algebra
and show that it is a consistent extension of and that it is reducible to BCDM. These properties ensure consistency with
most relational temporal database frameworks, facilitating future implementations. |
