Definition of Data Dictionary in MSD axapta

The AOT is organized to contain all elements that relate to how the data is stored in the database and those that relate to security, such as the Security Keys,Configuration Keys, and License Keys, under the node called Data Dictionary.

 Under this node, you will find tables, maps, views, extended data types, base enums, license codes, configuration keys, security keys, table collections, and perspectives.

EDT used to define data type which can be extended to any form or tables. Map use to show related date automatically. View used to show data as per selected tables and range in data source. Perspective used to display data using OLAP. Security key is used to give right to particular user for modules. and configuration keys used to define security module wise.