| definition | Formalising and documenting existing processes and events. A first step in analysing a system of objects with which users interact is to identify each object and its relationship to other objects. This process is called data modelling and results in a picture of object relationships. Data modellers often use multiple models to view the same data and ensure that all processes, entities, relationships and data flows have been identified. There are several different approaches to data modelling, including: Conceptual Data Modelling (identifies the highest-level relationships between different entities); Enterprise Data Modelling (similar to conceptual data modelling, but addresses the unique requirements of a specific organisation); Logical Data Modelling (illustrates the specific entities, attributes and relationships involved in a business function. Serves as the basis for the creation of the physical data model); Physical Data Modelling (represents an application and database-specific implementation of a logical data model). | ||||||
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| editorial note | Expert review decision, 2021-22: Edit | ||||||
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