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ICDE
1998
IEEE

Point-Versus Interval-Based Temporal Data Models

10 years 3 months ago
Point-Versus Interval-Based Temporal Data Models
The association of timestamps with various data items such as tuples or attribute values is fundamental to the management of time-varying information. Using intervals in timestamps, as do most data models, leaves a data model with a variety of choices for giving a meaning to timestamps. Specifically, some such data models claim to be point-based while other data models claim to be interval-based. The meaning chosen for timestamps is important--it has a pervasive effect on most aspects of a data model, including database design, a variety of query language properties, and query processing techniques, e.g., the availability of query optimization opportunities. This paper precisely defines the notions of point-based and interval-based temporal data models, thus providing a new, formal basis for characterizing temporal data models and obtaining new insights into the properties of their query languages. Queries in point-based models treat snapshot equivalent argument relations identically....
Michael H. Böhlen, Renato Busatto, Christian
Added 01 Nov 2009
Updated 01 Nov 2009
Type Conference
Year 1998
Where ICDE
Authors Michael H. Böhlen, Renato Busatto, Christian S. Jensen
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