Warning: This documentation is relevant only if you
are using a subscription-based Talend Studio.
If you need to filter your data to only send valid data to your output flows, you can create validation rules that will check your data. These validation rules can be a basic check for correct values or referential integrity check. As they are stored at the metadata level in the Repository, they can be easily reused and modified.
For more information on how to create those rules, see the Centralizing a Validation Rule.