On the screen Maintain Charact. Structure place the cursor on the line of a characteristic for which the origin "Table" is maintained. Select the menu options  Edit Rules Search rule.

You reach the dialog box Maintain Key Fields . The key fields are listed here for the table.

Enter the relational operators for the key fields, and press ENTER. If you have not entered a relational operator for one of the key fields, then the system sets it to "EQ".

The search rule is assigned to the characteristic.

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If, during a later calculation the system does not find a value that corresponds to the criteria, then it assigns the value zero to numerical fields insofar as this is mathematically possible. For non-numerical fields the initial value is used for further calculations.

To delete existing search rules, press Delete rule in the dialog box Maintain Key Fields.