This profile identifies the additional constraints, extensions, and value sets that build on and extend [DocumentReference](http://hl7.org/fhir/R4/documentreference.html) that are supported. 

Where a more specific DocumentReference profile is applicable, e.g. advance care plan , an implementation **SHALL** ensure the resource conforms to that specific profile.

This profile is designed to set a core DocumentReference standard for:
* Query for a generic document reference for a patient
* Record or update a generic document reference belonging to a patient


#### Profile specific guidance
None.

