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Chapter and Conference Paper
Nested Bitemporal Relational Algebra
We introduce a nested bitemporal relational data model that allows arbitrary levels of nesting. Bitemporal data is attached to attributes. The fundamental construct for representing temporal data is a bitempor...
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Chapter and Conference Paper
Temporality in Databases
Temporality, or the time dimension is an essential aspect of the reality databases attempt to model and keep data about. However, in many database applications temporal data is treated in a rather ad hoc manne...
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Chapter and Conference Paper
Temporal Data Modeling and Integrity Constraints in Relational Databases,
We address the key issues of temporal data modeling and temporal integrity constraints in the temporal extensions to the relational data model in attribute and tuple time stam**. These issues include represe...
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Chapter
Expressive power of temporal relational query languages and temporal completeness
In this paper, we consider the representation of temporal data based on tuple and attribute timestam**. We identify the requirements of temporal data and elaborate on their implications. We introduce a tempo...