Data Dictionary...

What is Data Dictionary?

• is a system independent interface to the database.
• is a virtual database ( data about data).
• provides data for data manipulation and data processing.
• Also called as DDIC and ABAP Dictionary.














Data Dictionary Objects

SE16

• Data Element
• Domain
• Tables
• Structures
• Views













Domain
• A Domain describes the technical structure of a field that is its size and
its data types.
• Domains are attached to Data Elements
• Fields which refer to the same domain (with the assigned data
elements), are also changed when the domain is changed. This ensures
that the fields are consistent
• Defines a value range which describes the valid data values for all the
fields which refer to this domain

Data Element
• A data element gives the description of the field of the Table
• Examples of predefined data elements in SAP
– LIFNR
– KUNNR
– MATNR
– CLNT