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dc.contributor.authorMartín Escofet, Carme
dc.contributor.authorSistac, Jaume
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria de Serveis i Sistemes d'Informació
dc.identifier.citationMartin, C., Sistac, J. "Bases de dades bitemporals". 1994.
dc.description.abstractTime is an essential part of information since it predicates about a constantly evolving real world. In this report, we present what is now considered in the best way to deal with time: mixing transaction time (the time when the information was stored in the database) with valid time (the time when the information is true in the modeled reality). By combining this two times, four types of databases are obtained, which differ in both their capability to support these time concepts and their ability to process temporal information. This report defines a bitemporal database model and presents a survey of selected problems in bitemporal databases. These problems focus mainly on the following issues: representations, updates and query languages for bitemporal databases.
dc.format.extent26 p.
dc.subjectÀrees temàtiques de la UPC::Informàtica::Informàtica teòrica
dc.subject.otherTransaction time
dc.subject.otherValid time
dc.subject.otherBitemporal databases
dc.titleBases de dades bitemporals
dc.typeExternal research report
dc.contributor.groupUniversitat Politècnica de Catalunya. GPLN - Grup de Processament del Llenguatge Natural
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorMartin, C.; Sistac, J.

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