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data element

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n. ~ A unit of information as defined within an information system, typically corresponding to a field in a database record or printed form.

Notes: 

A data element may include subelements (or subfields) and may simultaneously be a part of a larger data element. For example, a field in a MARC record consists of a number of elements, including a tag, indicators, and the contents, which may be divided into subfields. The field itself may be considered an element of the MARC record.

A Glossary of Archival and Records Terminology