If lookup values from a source system are no longer used by a lookup type, you can delete that source system.

1. Log into the Reference Data Management (RDM) application using your Reltio platform credentials.
   The RDM home screen appears:

   

2. Click Sources on the left navigation bar.
3. Select the source systems that you want to delete.

   

4. Click the Delete icon on the top of the list.
   The selected source systems appear as striked-through before you save.

   

5. Click SAVE.
   The selected source systems are removed from the sources list.

   Note: You cannot delete a source system if any values are added to it during mapping.