The data dictionary may be a stand-alone system or an integral part of the DBMS. Data integrity and accuracy is better ensured in the latter case. See DBMS and data administration.

A "data dictionary" is data about data. It is what defines the items in your database (s) and can be looked to for definitions, structures, use, allowable content, and sometimes business rules ...

With the exponential expansion of medical databases, the number of records in a single file has reached hundreds of millions, and the number of variables has increased significantly (such as the MIMIC ...