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ICDE
1993
IEEE
158views Database» more  ICDE 1993»
13 years 9 months ago
Unification of Temporal Data Models
To add time su port to the relational model, both first normal form (fNF and non-INF appmches have maining within 1NF when time support is added may introduce data redundancy. The...
Christian S. Jensen, Michael D. Soo, Richard T. Sn...
ICDE
2003
IEEE
117views Database» more  ICDE 2003»
14 years 7 months ago
Design and Implementation of a Temporal Extension of SQL
We present a valid-time extension of SQL and investigate its efficient implementation on an Object-Relational database system. We propose an approach where temporal queries are ex...
Cindy Xinmin Chen, Jiejun Kong, Carlo Zaniolo
DEXAW
1999
IEEE
137views Database» more  DEXAW 1999»
13 years 10 months ago
Reasoning with Enhanced Temporal Entity-Relationship Models
Recent efforts in the Conceptual Modelling community have been devoted to properly capturing time-varying information, and several proposals of temporally enhanced Entity-Relation...
Alessandro Artale, Enrico Franconi
ER
2006
Springer
87views Database» more  ER 2006»
13 years 9 months ago
Spatio-temporal and Multi-representation Modeling: A Contribution to Active Conceptual Modeling
Worldwide globalization increases the complexity of problem solving and decision-making, whatever the endeavor is. This calls for a more accurate and complete understanding of unde...
Stefano Spaccapietra, Christine Parent, Esteban Zi...
ER
1998
Springer
106views Database» more  ER 1998»
13 years 10 months ago
Chrono: A Conceptual Design Framework for Temporal Entities
Abstract. Database applications are frequently faced with the necessity of representing time varying information and, particularly in the management of information systems, a few k...
Sonia Bergamaschi, Claudio Sartori