Open access
Date
1997Type
- Report
ETH Bibliography
yes
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Abstract
We present a temporal object model capable of representing the lifespan of objects and also the history of the roles and associations in which they participate We advocate an approach of temporal generalisation rather than temporal extension in which a model in its entirety is given a temporal semantics through an orthogonal generalisation of all concepts of the model Our model allows objects to participate in several roles simultaneously Further metadata may also have temporal properties allowing the lifespan of the object roles themselves and constraints over these roles to be modelled The model is based on the generic object data model OM and the associated algebra has been generalised into a full temporal algebra over object roles Show more
Permanent link
https://doi.org/10.3929/ethz-a-006652011Publication status
publishedJournal / series
Technical reportVolume
Publisher
ETH Zurich, Institute for Information SystemsSubject
DATA MODELS (INFORMATION SYSTEMS); OBJECT-ORIENTED PROGRAMMING (PROGRAMMING METHODS); OBJEKTORIENTIERTE PROGRAMMIERUNG (PROGRAMMIERMETHODEN); DATENMODELLE (INFORMATIONSSYSTEME)Organisational unit
02150 - Dep. Informatik / Dep. of Computer Science
Notes
Technical Reports D-INFK.More
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ETH Bibliography
yes
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