✦ LIBER ✦

Data modelling and performance of data base systems

✍ Scribed by B.N. Rossiter

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 753 KB
Volume: 33
Category: Article
ISSN: 0010-4655
DOI: 10.1016/0010-4655(84)90102-4

No coin nor oath required. For personal study only.

✦ Synopsis

The three main methods of data modelling, hierarchical, network, and relational are described together with their advantages and disadvantages. The hierarchical model has strictly limited applicability, but the other two are of general use, although the network model in many respects defines a storage structure whilst the relational model defines a logical structure. Because of this, network systems are more difficult to use than relational systems but are easier to tune to obtain efficient performance. More advanced models have been developed to capture more semantic detail, and two of these RM/T and the role model are discussed.

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