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Use
The standard system contains a number of rules that you can modify in one of your customer clients. The modified version of a rule is the version with which you actually work.

If a customer rule exists with the same name as a standard rule and you display or change this schema in the customer client, you only access the modified version. The standard rule with the same name is not affected by any changes you make. For more information, refer to the
modification concept for personnel calculation rules and assigning names for standard and customer rulesActivities
You can change the attributes, source text, and documentation of a schema. Note that you must always check the changed attribute or source text for errors in the content or in the syntax. For more information, see
checking and saving changes to the source text.The schema editor includes the following change functions:
Change function for attributes Change function for source text Change function for documentation