Network Model (Database) | Database Model, Charles Bachman, CODASYL, Hierarchical Model, Tree Data Structure, Information Management System, Relational Model, RDM Server

Publisher

OmniScriptum

Publication Date

2026

Language

English

ISBN 10

6130902506

ISBN 13

9786130902506

Binding

Taschenbuch

Condition

Neu

Dimensions

Weight

119 grams

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Synopsis

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The network model is a database model conceived as a flexible way of representing objects and their relationships. Its distinguishing feature is that the schema, viewed as a graph in which object types are nodes and relationship types are arcs, is not restricted to being a hierarchy or lattice.Where the hierarchical model structures data as a tree of records, with each record having one parent record and many children, the network model allows each record to have multiple parent and child records, forming a generalized graph structure. This property applies at two levels: the schema is a generalized graph of record types connected by relationship types (called set types" in CODASYL), and the database itself is a generalized graph of record occurrences connected by relationships (CODASYL "sets"). Cycles are permitted at both levels. "

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