One could just record the observation (design pattern discussed above) in a persistent (probably episodic) composition. It would be a ‘duplicate’ since the original data is off course event based. But I think that’s acceptable in this case (and many others). It does relate to the other discussion going on: https://discourse.openehr.org/t/how-accurately-do-we-model-copied-data
@johngrant4est would you be able to supply a copy of the current “donor card”? There’s often a lot of context to learn from an exact copy I find.