Rulebases
You can use rulebases within TIBCO MDM to complete data validation, record modification, and data lookups.
Rulebases although powerful are prone to misuse. The mentioned best practices need to be considered when working with rulebases.
All rulebases are evaluated top down. Any rules that make changes to fields at the top of the rule may get overwritten by rules evaluated later on.
You should not make changes directly to rulebase files after they have been deployed in TIBCO MDM because this can lead to lost changes.
Always use Business Studio to develop and deploy the rules. The only exception to this is rulebases called during workflows to validate data being worked on. In such cases, you should manually place the rules in the correct folder and point the workflow to this rule.