Digital Library of Zielona Góra contains 9 272 digital objects
Object
Title: A formal data model and object algebra for object-oriented databases
Contributor:
Korbicz, Józef (1951- ) - red. ; Uciński, Dariusz - red.
Group publication title:
Abstract:
In this paper we describe a formal object-oriented data model and a corresponding object-algebra. Described in the literature are two trends in query support for object-oriented databases. The first trend is to preserve existing objects, while the other trend allows for the creation of new objects. ; The object algebra presented in this paper is of the second type and includes operators of the relational algebra in addition to some others, but the semantics of all those operations has been specified to accomodate to the object-oriented features. An operand should have a defined set of objects and a set of message expressions. ; A message expression is sequence of messages. Also the result of any operation is defined to have the two sets and therefore, can be an operand. Hence the closure property is satisfied. Finally we include some of the properties of the described object algebra operators.
Publisher:
Zielona Góra: Uniwersytet Zielonogórski
Resource Identifier:
Pages:
Source:
AMCS, volume 2, number 1 (1992) ; click here to follow the link
Language:
License CC BY 4.0:
Rights:
Biblioteka Uniwersytetu Zielonogórskiego
Object collections:
- Repository > Faculties > Faculty of Computer, Electrical and Control Engineering
- Repository > Types of work > Articles
- Repository > Scientific journals and UZ publishing series > International Journal of Applied Mathematics and Computer Science (AMCS) > International Journal of Applied Mathematics and Computer Science (AMCS) (1992)
Last modified:
Jul 14, 2025
In our library since:
Jul 3, 2020
Number of object content hits:
163
All available object's versions:
https://zbc.uz.zgora.pl/repozytorium/publication/63776
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Show description in OAI-PMH format:
| Edition name | Date |
|---|---|
| A formal data model and object algebra for object-oriented databases | Jul 14, 2025 |
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