Abstract
In our previous work [EIEK90], we introduced a Semantic Temporal model based on the Extended Entity-Relationship model (STEER), where we proposed new classification concepts for temporal/conceptual objects and relationships. We defined temporal constraints and outlined rules for preserving temporal integrity constraints.
In this paper, we propose a temporal query language based on the STEER data model. The query language is a temporal extension of GORDAS [ElWi81, ElWu90], which is a formal, high-level, user-friendly query language for the Extended Entity-Relationship model. The temporal query language derives its power and flexibility from the distinction between temporal and conceptual objects, and from temporal and conceptual relationships. It provides natural and high level temporal element constructor operators that simplify temporal query expressions.
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References
Ahn, I., and Snodgrass, R. Partitioned storage for temporal databases. In Information Systems, 13(4), (1988).
Elmasri, R., El-Assal, I., and Kouramajian, V. Semantics of temporal data in an extended ER model. In 9th Entity-Relationship Conference (October 1990).
Elmasri, R., Jaseemuddin, M., and Kouramajian, V. Partitioning of time index for optical disks. In IEEE Data Engineering Conference, (February 1992).
Elmasri, R., Wuu, G., and Kim, Y. The time index: An access structure for temporal data. In VLDB Conference, (August 1990).
Elmasri, R., Weeldreyer, J., and Hevner, A. The category concept: An extension to the ER model. In Data and Knowledge Engineering (June 1985).
Elmasri, R., and Wiederhold, J. GORDAS: A formal high-level query language for the ER model. In 2nd Entity-Relationship Conference (October 1981).
Elmasri, R., and Wuu, G. A temporal model and query language for ER databases. In IEEE Data Engineering Conference, (February 1990).
Gadia, S., and Yeung, C. A generalized model for a temporal relational database. In ACM SIGMOD Conference (June 1988).
Jensen, C. Towards the realization of transaction time database systems. Ph.D. Dissertation, University of Maryland, (December 1990).
Jensen, C., and Snodgrass, R. Temporal specialization and generalization. Technical Report, University of Arizona, (November 1991).
Navathe, S., and Ahmed, R. A temporal data model and query language. In Information Sciences (1989).
Segev, A., and Shoshani, A. Logical modeling of temporal data. In ACM SIGMOD Conference (June 1987).
Snodgrass, R. The temporal query language TQUEL. In ACM TODS 12 (2), (June 1987).
Sripada, S. A logical framework for temporal deductive databases. In VLDB Conference, (August 1988).
Wuu, G., and Dayal U. A uniform model for temporal object-oriented databases. In IEEE Data Engineering Conference (February 1992).
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© 1992 Springer-Verlag Berlin Heidelberg
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Elmasri, R., Kouramajian, V. (1992). A temporal query language based on conceptual entities and roles. In: Pernul, G., Tjoa, A. (eds) Entity-Relationship Approach — ER '92. ER 1992. Lecture Notes in Computer Science, vol 645. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-56023-8_23
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DOI: https://doi.org/10.1007/3-540-56023-8_23
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Online ISBN: 978-3-540-47356-5
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