Fundamentals of database systems (2nd ed.)
Fundamentals of database systems (2nd ed.)
Temporal Entity-Relationship Models-A Survey
IEEE Transactions on Knowledge and Data Engineering
On the Ontological Expressiveness of Temporal Extensions to the Entity-Relationship Model
ER '99 Proceedings of the Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling
The formal semantics of the timeER model
APCCM '06 Proceedings of the 3rd Asia-Pacific conference on Conceptual modelling - Volume 53
TimeERplus: a temporal EER model supporting schema changes
BNCOD'05 Proceedings of the 22nd British National conference on Databases: enterprise, Skills and Innovation
Foundations of Temporal Conceptual Data Models
Conceptual Modeling: Foundations and Applications
Complexity of reasoning over temporal data models
ER'10 Proceedings of the 29th international conference on Conceptual modeling
Tailoring temporal description logics for reasoning over temporal conceptual models
FroCoS'11 Proceedings of the 8th international conference on Frontiers of combining systems
Modeling temporal dimensions of semistructured data
Journal of Intelligent Information Systems
Proceedings of the 2012 international workshop on Smart health and wellbeing
Recursive natural join operation in bitemporal nested relations
International Journal of Intelligent Information and Database Systems
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A wide range of database applications manage information that varies over time. The conceptual modeling of databases is frequently based on one of the several versions of the ER model. As this model does not provide built-in means for capturing temporal aspects of data, the resulting diagrams are unnecessarily obscure and inadequate for documentation purposes. The TimeERmodel extends the ER model with suitable constructs for modeling time-varying information, easing the design process, and leading to easy-to-understand diagrams. In a temporal ER model, support for the specification of advanced temporal constraints would be desiderable, allowing the designer to specify, e.g., that the value of an attribute must not change over time. This paper extends the TimeERmodel by introducing the notation, and the associated semantics, for the specification of new temporal constraints.