Advance directive reference - errors validation phase
An advance directive reference (templateId 2.16.840.1.113883.10.20.1.36) SHALL be represented with Observation / reference / ExternalDocument.
The value for Observation / reference / typeCode in an advance directive reference SHALL be 'REFR' 2.16.840.1.113883.5.1002 ActRelationshipType STATIC.
ExternalDocument SHALL contain at least one ExternalDocument / id.
Advance directive reference - warning validation phase
Advance directive reference - manual validation phase