Metadata

Data about data. Examples of metadata include data-element descriptions (for example, the name, length, valid values, and description), data-type descriptions, attribute and property descriptions, range and domain descriptions, and process and method descriptions. The repository environment encompasses all corporate metadata resources: database catalogs, data dictionaries, and navigation services. Metadata is stored in a data dictionary and repository. It insulates a data warehouse from changes in the schema of operational systems.

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