## Union of http://hl7.org/fhir/ValueSet/c80-doc-typecodes and http://hl7.org/fhir/us/core/ValueSet/us-core-documentreference-type

This is the ValueSet that contains all the codes in Document Type Value Set (http://hl7.org/fhir/ValueSet/c80-doc-typecodes) and US Core DocumentReference Type (http://hl7.org/fhir/us/core/ValueSet/us-core-documentreference-type). E.g. what you have to deal with if you get resources containing codes in either of them

### CodeSystem

Generated Narrative: ValueSet cb770e79-e577-4b10-bf68-e7548d6d8eed-122

This value set includes codes based on the following rules:

- Import all the codes that are contained in the intersection of
- Include these codes as defined in `http://terminology.hl7.org/CodeSystem/v3-NullFlavor` version 📦3.0.0

  Code | Display | Definition
  `UNK` | unknown | **Description:**A proper value is applicable, but not known. **Usage Notes**: This means the actual value is not known. If the only thing that is unknown is how to properly express the value in the necessary constraints (value set, datatype, etc.), then the OTH or UNC flavor should be used. No properties should be included for a datatype with this property unless: 1. Those properties themselves directly translate to a semantic of "unknown". (E.g. a local code sent as a translation that conveys 'unknown') 2. Those properties further qualify the nature of what is unknown. (E.g. specifying a use code of "H" and a URL prefix of "tel:" to convey that it is the home phone number that is unknown.)