The logical data model

We propose an object-oriented data model that generalizes the relational, hierarchical, and network models. A database scheme in this model is a directed graph, whose leaves represent data and whose internal nodes represent connections among the data. Instances are constructed from objects, which ha...

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Bibliographic Details
Published in:ACM transactions on database systems 1993-09, Vol.18 (3), p.379-413
Main Authors: Kuper, Gabriel M., Vardi, Moshe Y.
Format: Article
Language:English
Subjects:
Applied sciences
Computer science
control theory
systems
Data management systems
Data model extensions
Database design and models
Exact sciences and technology
Information systems
Information systems. Data bases
Memory organisation. Data processing
Query languages
Software
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Summary:We propose an object-oriented data model that generalizes the relational, hierarchical, and network models. A database scheme in this model is a directed graph, whose leaves represent data and whose internal nodes represent connections among the data. Instances are constructed from objects, which have separate names and values. We define a logic for the model, and describe a nonprocedural query language that is based on the logic. We also describe an algebraic query language and show that it is equivalent to the logical language.
ISSN:0362-5915
1557-4644
DOI:10.1145/155271.155274