This is the set of resources that conform to either of the profiles External Document Reference (http://hl7.org/cda/us/ccda/StructureDefinition/ExternalDocumentReference) and External Document Reference (http://hl7.org/cda/us/ccda/StructureDefinition/ExternalDocumentReference). E.g. what you have to deal with if you get resources conforming to one of them
| Name | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
  ExternalDocument | C | 1..1 | Base for all types and resources should-setId: SHOULD contain setId should-versionNumber: SHOULD contain versionNumber | |
  nullFlavor | 0..1 | ?? | Binding: ?? (required) | |
 realmCode | 0..* | CS | ||
 typeId | 0..1 | II | ||
 nullFlavor | 0..1 | ?? | Binding: ?? (required) | |
| assigningAuthorityName | 0..1 | ?? | ||
| displayable | 0..1 | ?? | ||
| root | 1..1 | ??, ??, ?? | ||
 extension | 1..1 | ?? | ||
| templateId | 1..* | II | ||
| classCode | 1..1 | ?? | Binding: ?? (required) | |
| moodCode | 1..1 | ?? | Binding: ?? (required) | |
| code | 1..1 | CD | Binding: ?? (example) | |
| text | 0..1 | ED | ||
| setId | 0..1 | II | ||
| versionNumber | 0..1 | INT | ||
| Documentation for this format | ||||