Data modeling: Difference between revisions

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{{Short description|Creating a model of the data in a system}}

{{duplication|dupe=Data model|date=March 2023}}

ع الفيس{{Use mdy dates|date=March 2016}}

[[File:4-3 Data Modelling Today.svg|420px|thumb|The data modeling process. The figure illustrates the way data models are developed and used today . A [[Conceptual schema|conceptual data model]] is developed based on the data [[requirement]]s for the application that is being developed, perhaps in the context of an [[activity diagram|activity model]]. The data model will normally consist of entity types, attributes, relationships, integrity rules, and the definitions of those objects. This is then used as the start point for interface or database design.<ref name="MW99"/>]]{{Software development process}}

'''Data modeling''' in [[software engineering]] is the process of creating a [[data model]] for an [[information system]] by applying certain formal techniques. It may be applied as part of broader [[Model-driven engineering]] (MDE) concept.

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According to ANSI, this approach allows the three perspectives to be relatively independent of each other. Storage technology can change without affecting either the logical or the conceptual schema. The table/column structure can change without (necessarily) affecting the conceptual schema. In each case, of course, the structures must remain consistent across all schemas of the same data model.

=== Data modellingmodeling process ===

{{further|Database design}}

[[File:Data modeling context.svg|thumb|360px|Data modeling in the context of [[business process]] integration.<ref name="SS93">Paul R. Smith & Richard Sarfaty (1993). [http://www.osti.gov/energycitations/purl.cover.jsp;jsessionid=6192EDBFBAB7DCED13883C55F221221A?purl=/10160331-YhIRrY/ Creating a strategic plan for configuration management using Computer Aided Software Engineering (CASE) tools.] Paper For 1993 National DOE/Contractors and Facilities CAD/CAE User's Group.</ref>]]