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Network Model (Database)
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Details
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.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786130902506
- Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
- Genre Physik & Astronomie
- Größe H220mm x B220mm
- EAN 9786130902506
- Format Fachbuch
- Titel Network Model (Database)
- Herausgeber Betascript Publishing
- Anzahl Seiten 68
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