Tansel, Abdullah UzTin, E.2016-02-082016-02-081994-07http://hdl.handle.net/11693/27790Conference name: Proceedings of the 1994 Engineering Systems Design and Analysis Conference : presented at the Second Biennial European Joint Conference on Engineering Systems Design and AnalysisDate of Conference: 4-7 July, 1994We introduce a historical relational data model in which N1NF relations are used and 1-level of nesting is allowed. Attributes can either be atomic or temporal atom. An atomic attribute represents a time invariant attribute. A temporal atom consists of two components, a value and a temporal set, which is a set of times denoting the validity period of the value. We define a relational tuple calculus for this model. We follow a comparative approach towards completeness of historical query languages.EnglishComputational complexityData structuresRelational database systemsHistorical database (HDB)Relational query languagesQuery languagesConference Paper