data dictionary

Set of metadata that contains definitions and representations of data elements

EntityQ1147639

Also known as metadata repository · data directory · data dictionaries

Subclass of: catalog
, data model
Part of: database

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

A data dictionary, or metadata repository, as defined in the IBM Dictionary of Computing, is a "centralized repository of information about data such as meaning, relationships to other data, origin, usage, and format". Oracle defines it as a collection of tables with metadata. The term can have one of several closely related meanings pertaining to databases and database management systems (DBMS):A document describing a database or collection of databases An integral component of a DBMS that is required to determine its structure A piece of middleware that extends or supplants the native data dictionary of a DBMS

Overview

All data

25 statements · 24% with external sources · numbers in brackets are citations

Different from: data catalog
business glossary
Facet of: metadata management
ACM Classification Code (2012): 10003224

On other databases

18 identifiers linking data dictionary across the web's reference databases

Data quality

statements

24%

externally sourced

Source last edited July 10, 2026. AIDB refreshes this page daily.

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Cite this page

AIDB. (2026). data dictionary (Q1147639). Retrieved from https://aidb.si/e/data-dictionary-Q1147639