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SAP R/3 Handbook, Third Edition, 3rd Edition by Jim Keogh, Jose Hernandez, Franklin Martinez

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The ABAP Dictionary

The ABAP Dictionary, known usually as data dictionary, is the central workbench repository utility providing the data definitions and the information relationships that are later used in all the SAP business applications.

The ABAP dictionary can be seen as a logical representation or a superior layer over the physical underlying database. The supported database engines must comply with the relational data model. This model is strictly followed by the ABAP dictionary.

A data dictionary in computing terms is the source of information in which the system data are defined in a logical way. The data dictionary is the centralized and structured source of information for business applications and the core of a well-structured development ...

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