Data dictionary

From CASRAI dictionary

Data dictionary

A collection of descriptions of the data objects or items in a data model. A first step in analyzing a system of objects with which users interact is to identify each object and its relationship to other objects. This process is called data modeling and results in a picture of object relationships. After each data object or item is given a descriptive name, its relationship is described (or it becomes part of some structure that implicitly describes relationship), the type of data (such as text or image or binary value) is described, possible predefined values are listed, and a brief textual description is provided. This collection can be organized for reference into an eBook called a data dictionary.

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Data dictionary
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Original source http://searchsoa.techtarget.com/definition/data-dictionary