Valid-Time Indeterminacy in Temporal Relational Databases: A Family of Data Models

Luca Anselma, Paolo Terenziani, Richard T. Snodgrass
2010 2010 17th International Symposium on Temporal Representation and Reasoning  
Valid-time indeterminacy concerns not knowing exactly when a fact holds in the modeled reality. In this paper, we first propose a reference approach (data model and algebra) in which all possible temporal scenarios induced by valid-time indeterminacy can be extensionally modeled. We then specify a family of sixteen more compact representational data models. We demonstrate their correctness with respect to the reference approach and analyze several properties, including their data expressiveness
more » ... data expressiveness and correctness with respect to the reference approach. Finally, we compare these compact models along several relevant dimensions. Keywords-temporal relational database; valid-time indeterminacy; data models and algebras I.
doi:10.1109/time.2010.15 dblp:conf/time/AnselmaTS10 fatcat:cmdbu6vsrneehh2ip65zs3k4dy