Extra data elements in archetypes representing clinical scores and scales

I think it largely depends what you are trying to achieve.

If you are trying to document the actual information provider / provenance for a single element, you could use the RM feeder_audit attribute which is available to every Element.

https://specifications.openehr.org/releases/UML/latest/#Architecture___18_1_83e026d_1433773263740_183956_5413

However my reading of Nuno’s use-case is that this is much more about commenting on the interpretation of the score "Diet information provided by elderly mother - not sure this is entirely reliable’, rather than “Information provider: Vera McNicoll” (Both may be used, of course).