What is Data Dictionary and its' function

What is an ABAP data dictionary?

 ABAP 4 data dictionary describes the logical structures of the objects used in application development and shows how they are mapped to the underlying relational database in tables/views.

 

What functions does a data dictionary perform?

In a data management system, the principal functions performed by the data dictionary are

·             Management of data definitions.

·             Provision of information for evaluation.

·             Support for s/w development.

·             Support form documentation.

·             Ensuring that the data definitions are flexible and up-to-date.