1. SAP/R3 Development workbench Data Dictionary R/3 table types: –Transparent tables Each table definition in DDIC has an underlying physical table of same name. Used to hold application data eg Vendor master data –Pooled and cluster tables Can have many table definitions in DDIC but only one underlying physical database of a different name, different fields. Used to hold system data such as configuration data, historical and statistical data.

2. SAP/R3 Development workbench Data Dictionary Field (Lifnr) Data Element (Lifnr) Semantic Descriptions Domain (Lifnr) Technical Descriptions

3. SAP/R3 Development workbench Data Dictionary Approaches for creating tables –Bottom-up Create domains first, then data elements then the table. Easier to understand for the novice Quickly becomes cumbersome –Top-down Create table first, then forward navigate to create data elements and domains. Much easier to use