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Autori:Luca Anselma
Alessio Bottrighi
Stefania Montani
Paolo Terenziani
Area Scientifica:Temporal Reasoning
Titolo:A temporal relational data model for proposals and evaluations of updates
Apparso su:TR-INF-2009-09-07-UNIPMN
Editore:Computer Science Department, UPO
Anno:2009
Tipo Pubblicazione:Technical Report
URL:http://www.di.unipmn.it...R-INF-2009-09-07-UNIPMN.pdf
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.