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  2. Network model - Wikipedia

    en.wikipedia.org/wiki/Network_model

    While the hierarchical database 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 ...

  3. Database model - Wikipedia

    en.wikipedia.org/wiki/Database_model

    The network model expands upon the hierarchical structure, allowing many-to-many relationships in a tree-like structure that allows multiple parents. It was most popular before being replaced by the relational model, and is defined by the CODASYL specification. The network model organizes data using two fundamental concepts, called records and ...

  4. IDMS - Wikipedia

    en.wikipedia.org/wiki/IDMS

    The data model offered to users is the CODASYL network model. The main structuring concepts in this model are records and sets. Records essentially follow the COBOL pattern, consisting of fields of different types: this allows complex internal structure such as repeating items and repeating groups.

  5. Data model - Wikipedia

    en.wikipedia.org/wiki/Data_model

    Network model This model organizes data using two fundamental constructs, called records and sets. Records contain fields, and sets define one-to-many relationships between records: one owner, many members. The network data model is an abstraction of the design concept used in the implementation of databases. Relational model

  6. Database - Wikipedia

    en.wikipedia.org/wiki/Database

    The most popular example of a database model is the relational model (or the SQL approximation of relational), which uses a table-based format. Common logical data models for databases include: Navigational databases. Hierarchical database model; Network model; Graph database; Relational model; Entity–relationship model. Enhanced entity ...

  7. YANG - Wikipedia

    en.wikipedia.org/wiki/YANG

    The data modeling language can be used to model both configuration data as well as state data of network elements. Furthermore, YANG can be used to define the format of event notifications emitted by network elements and it allows data modelers to define the signature of remote procedure calls that can be invoked on network elements via the ...

  8. CODASYL - Wikipedia

    en.wikipedia.org/wiki/CODASYL

    The ANSI X3H2 Committee, formed May 1978, was originally charged with creating a standard for the CODASYL network data model. The resulting NDL (network database language) standard was finished in 1982. The committee work on standardizing the relational data model resulted in the SQL (structured query language) standard in 1984.

  9. Network database model - Wikipedia

    en.wikipedia.org/?title=Network_database_model&...

    This page was last edited on 23 September 2011, at 02:09 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.