Unification of temporal data models
A conceptual temporal data model that captures the time-dependent semantics of data while permitting multiple data models at the representation level is described. A conceptual notion of a bitemporal relation in which tuples are stamped with sets of two-dimensional chronons in transaction-time/valid...
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| creator | Jensen, C.S. Soo, M.D. Snodgrass, R.T. |
| description | A conceptual temporal data model that captures the time-dependent semantics of data while permitting multiple data models at the representation level is described. A conceptual notion of a bitemporal relation in which tuples are stamped with sets of two-dimensional chronons in transaction-time/valid-time space is defined. A tuple-timestamped first normal form representation is introduced to show how the conceptual bitemporal data model is related, by means of snapshot equivalence, with representational models. Querying within the two-level framework is discussed. An algebra is defined at the conceptual level and mapped to the sample representational model in such a way that new operators compute equivalent results for different representations of the same conceptual bitemporal relation.< > |
| doi_str_mv | 10.1109/ICDE.1993.344056 |
| format | Conference Proceeding |
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A conceptual notion of a bitemporal relation in which tuples are stamped with sets of two-dimensional chronons in transaction-time/valid-time space is defined. A tuple-timestamped first normal form representation is introduced to show how the conceptual bitemporal data model is related, by means of snapshot equivalence, with representational models. Querying within the two-level framework is discussed. An algebra is defined at the conceptual level and mapped to the sample representational model in such a way that new operators compute equivalent results for different representations of the same conceptual bitemporal relation.< ></description><identifier>ISBN: 0818635703</identifier><identifier>ISBN: 9780818635700</identifier><identifier>DOI: 10.1109/ICDE.1993.344056</identifier><language>eng</language><publisher>IEEE Comput. Soc. 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A conceptual notion of a bitemporal relation in which tuples are stamped with sets of two-dimensional chronons in transaction-time/valid-time space is defined. A tuple-timestamped first normal form representation is introduced to show how the conceptual bitemporal data model is related, by means of snapshot equivalence, with representational models. Querying within the two-level framework is discussed. An algebra is defined at the conceptual level and mapped to the sample representational model in such a way that new operators compute equivalent results for different representations of the same conceptual bitemporal relation.< ></abstract><pub>IEEE Comput. Soc. Press</pub><doi>10.1109/ICDE.1993.344056</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISBN: 0818635703 |
| ispartof | Proceedings of IEEE 9th International Conference on Data Engineering, 1993, p.262-271 |
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| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Computer science Data models Database languages Mathematical model Mathematics Query processing Transaction databases |
| title | Unification of temporal data models |
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