Data model: Difference between revisions

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A '''data model''' (or '''datamodel''')<ref>{{cite web|title= datamodel - UML Domain Modeling - Stack Overflow|url= https://stackoverflow.com/a/3835214|website= Stack Overflow|publisher= Stack Exchange Inc.|access-date= 4 February 2017}}</ref><ref name="w3cxpath">{{cite web|title= XQuery and XPath Data Model 3.1|url= https://www.w3.org/TR/xpath-datamodel-3/|website= World Wide Web Consortium (W3C)|publisher= W3C|access-date= 4 February 2017}}</ref><ref name="npmdatamodel">{{cite web|title= datamodel|url= https://www.npmjs.com/package/datamodel|website= npm|publisher= npm, Inc.|access-date= 4 February 2017}}</ref><ref>{{cite web|title= DataModel (Java EE 6)|url= http://docs.oracle.com/javaee/6/api/javax/faces/model/DataModel.html|website= Java Documentation|publisher= Oracle|access-date= 4 February 2017}}</ref><ref>{{cite web|last1= Ostrovskiy|first1= Stan|title= iOS: Three ways to pass data from Model to Controller|url= https://medium.com/ios-os-x-development/ios-three-ways-to-pass-data-from-model-to-controller-b47cc72a4336#.ma7pr7no7|website= Medium|publisher= A Medium Corporation|access-date= 4 February 2017}}</ref> is an [[abstract model]] that organizes elements of [[data]] and standardizes how they relate to one another and to the properties of real-world entities. For instance, a data model may specify that the data element representing a car be composed of a number of other elements which, in turn, represent the color and size of the car and define its owner.

The term '''data model''' can refer to two distinct but closely related concepts. Sometimes it refers to an abstract formalization of the objects and relationships found in a particular application ___domain: for example the customerescustomers, products, and orders found in a manufacturing organization. At other times it refers to the set of concepts used in defining such formalizations: for example concepts such as entities, attributes, relations, or tables. So the "data model" of a banking application may be defined using the entity-relationship "data model". This article uses the term in both senses.

[[File:Data modeling context.svg|thumb|360px| Overview of a data-modeling context: Data model is based on Data, Data relationship, Data semantic and Data constraint. A data model provides the details of [[information]] to be stored, and is of primary use when the final product is the generation of computer [[software code]] for an application or the preparation of a [[functional specification]] to aid a [[computer software]] make-or-buy decision. The figure is an example of the interaction between [[business process modeling|process]] and data models.<ref name="SS93">Paul R. Smith & Richard Sarfaty Publications, LLC 2009</ref>]]