Network model

<p>In <a href="/facts/Computing/Kghtm9fX">computing</a>, the network model is a <a href="/facts/Database_model/1okm9rHu">database model</a> conceived as a flexible way of representing objects and their relationships. Its distinguishing feature is that the <a href="/facts/Database_schema/DBq8fooY">schema</a>, viewed as a <a href="/facts/Graph_(discrete_mathematics)/kw3eIBUe">graph</a> in which object types are nodes and relationship types are arcs, is not restricted to being a hierarchy or <a href="/facts/Lattice_graph/4EHMt1b6">lattice</a>.
</p><p>The network model was adopted by the <a href="/facts/CODASYL/Vj9bpJ33">CODASYL</a> <a href="/facts/Data_Base_Task_Group/QhNPw5Ks">Data Base Task Group</a> in 1969 and underwent a major update in 1971. It is sometimes known as the CODASYL model for this reason. A number of network database systems became popular on <a href="/facts/Mainframe/nrBR6rWa">mainframe</a> and <a href="/facts/Minicomputer/g8hvpQxe">minicomputers</a> through the 1970s before being widely replaced by <a href="/facts/Relational_database/pEKGmJLy">relational databases</a> in the 1980s.
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Network model open-in-new

Network model