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Issue No. 03 - March (2013 vol. 25)
ISSN: 1041-4347
pp: 556-570
Luca Anselma , Universita di Torino, Torino
Alessio Bottrighi , Universita del Piemonte Orientale, Alessandria
Stefania Montani , Universita del Piemonte Orientale, Alessandria
Paolo Terenziani , Universita del Piemonte Orientale, Alessandria
The cooperative construction of data/knowledge bases has recently had a significant impulse (see, e.g., Wikipedia [1]). In cases in which data/knowledge quality and reliability are crucial, proposals of update/insertion/deletion need to be evaluated by experts. To the best of our knowledge, no theoretical framework has been devised to model the semantics of update proposal/evaluation in the relational context. Since time is an intrinsic part of most domains (as well as of the proposal/evaluation process itself), semantic approaches to temporal relational databases (specifically, Bitemporal Conceptual Data Model (henceforth, BCDM) [2]) are the starting point of our approach. In this paper, we propose {\rm BCDM^{PV}}, a semantic temporal relational model that extends BCDM to deal with multiple update/insertion/deletion proposals and with acceptances/rejections of proposals themselves. We propose a theoretical framework, defining the new data structures, manipulation operations and temporal relational algebra and proving some basic properties, namely that {\rm BCDM^{PV}} is a consistent extension of BCDM and that it is reducible to BCDM. These properties ensure consistency with most relational temporal database frameworks, facilitating implementations.
Temporal databases, Semantics, Data models, Database design, Encyclopedias, Knowledge discovery, Internet, modeling and management, Temporal databases, database semantics, database design

S. Montani, A. Bottrighi, P. Terenziani and L. Anselma, "Extending BCDM to Cope with Proposals and Evaluations of Updates," in IEEE Transactions on Knowledge & Data Engineering, vol. 25, no. , pp. 556-570, 2013.
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