Union of http://hl7.org/fhir/us/core/StructureDefinition/us-core-documentreference and http://hl7.org/fhir/us/pq-cmc-fda/StructureDefinition/cmc-document-reference

This is the set of resources that conform to either of the profiles US Core DocumentReference Profile (http://hl7.org/fhir/us/core/StructureDefinition/us-core-documentreference) and Document Reference Attachment (http://hl7.org/fhir/us/pq-cmc-fda/StructureDefinition/cmc-document-reference). E.g. what you have to deal with if you get resources conforming to one of them

Structure

Name	Flags	Card.	Type	Description & Constraints
DocumentReference		0..*		A reference to a document dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated dom-5: If a resource is contained in another resource, it SHALL NOT have a security label dom-6: A resource should have narrative for robust management
meta	Σ	0..1	Meta	Metadata about the resource ele-1: All FHIR elements must have a @value or children
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
versionId	Σ	0..1	id	Version specific identifier ele-1: All FHIR elements must have a @value or children
lastUpdated	Σ	0..1	instant	When the resource version last changed ele-1: All FHIR elements must have a @value or children
source	Σ	0..1	uri	Identifies where the resource comes from ele-1: All FHIR elements must have a @value or children
profile	SΣ	0..1	canonical(StructureDefinition)	Profiles this resource claims to conform to ele-1: All FHIR elements must have a @value or children
security	Σ	0..*	Coding	Security Labels applied to this resource Binding: ?? (extensible): Security Labels from the Healthcare Privacy and Security Classification System. ele-1: All FHIR elements must have a @value or children
tag	Σ	0..*	Coding	Tags applied to this resource Binding: ?? (example): Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones". ele-1: All FHIR elements must have a @value or children
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created ele-1: All FHIR elements must have a @value or children
language		0..1	code	Language of the resource content Binding: ?? (required): left: A human language.; right: IETF language tag for a human language ele-1: All FHIR elements must have a @value or children
text		0..1	Narrative	Text summary of the resource, for human interpretation ele-1: All FHIR elements must have a @value or children
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
masterIdentifier	Σ	0..1	Identifier	Master Version Specific Identifier ele-1: All FHIR elements must have a @value or children
identifier	SΣ	0..*	Identifier	left: Other identifiers for the document; right: Business identifiers for the document ele-1: All FHIR elements must have a @value or children
status	?!SΣ	1..1	code	current | superseded | entered-in-error Binding: ?? (required): The status of the document reference. ele-1: All FHIR elements must have a @value or children
docStatus	Σ	0..1	code	left: preliminary | final | amended | entered-in-error; right: registered | partial | preliminary | final | amended | corrected | appended | cancelled | entered-in-error | deprecated | unknown Binding: ?? (required): Status of the underlying document. ele-1: All FHIR elements must have a @value or children
type	SΣ	0..1	CodeableConcept	Kind of document (LOINC if possible) Binding: ?? (required): left: All LOINC values whose SCALE is DOC in the LOINC database and the HL7 v3 Code System NullFlavor concept 'unknown'; right: Precise type of clinical document. ele-1: All FHIR elements must have a @value or children
category	SΣ	0..*	CodeableConcept	Categorization of document Binding: ?? (example): left: High-level kind of a clinical document at a macro level.; right: High-level kind of document at a macro level. ele-1: All FHIR elements must have a @value or children
subject	SΣ	0..1	Reference(Resource)	Who/what is the subject of the document ele-1: All FHIR elements must have a @value or children
date	SΣ	0..1	instant	When this document reference was created ele-1: All FHIR elements must have a @value or children
author	SΣ	0..*	Reference(Practitioner | PractitionerRole | Organization | Device | Patient | RelatedPerson | CareTeam)	Who and/or what authored the document ele-1: All FHIR elements must have a @value or children
authenticator		0..1	Reference(Practitioner | PractitionerRole | Organization)	Who/what authenticated the document ele-1: All FHIR elements must have a @value or children
custodian		0..1	Reference(Organization)	Organization which maintains the document ele-1: All FHIR elements must have a @value or children
relatesTo	Σ	0..*	BackboneElement	Relationships to other documents ele-1: All FHIR elements must have a @value or children
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1		left: replaces | transforms | signs | appends; right: The relationship type with another document Binding: ?? (extensible): left: The type of relationship between documents.; right: The type of relationship between the documents. ele-1: All FHIR elements must have a @value or children
code			code
code			CodeableConcept
target	Σ	1..1	Reference(DocumentReference)	Target of the relationship ele-1: All FHIR elements must have a @value or children
description	Σ	0..1		Human-readable description ele-1: All FHIR elements must have a @value or children
description			string
description			markdown
securityLabel	Σ	0..*	CodeableConcept	Document security-tags Binding: ?? (extensible): left: Security Labels from the Healthcare Privacy and Security Classification System.; right: Example Security Labels from the Healthcare Privacy and Security Classification System. ele-1: All FHIR elements must have a @value or children
content	SΣ	1..*	BackboneElement	Document referenced ele-1: All FHIR elements must have a @value or children
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
attachment	SΣC	1..1	Attachment	Where to access the document ele-1: All FHIR elements must have a @value or children us-core-6: DocumentReference.content.attachment.url or DocumentReference.content.attachment.data or both SHALL be present.
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
contentType	SΣ	0..1	code	Mime type of the content, with charset etc. Binding: ?? (required): left: The mime type of an attachment. Any valid mime type is allowed.; right: BCP 13 (RFCs 2045, 2046, 2047, 4288, 4289 and 2049) ele-1: All FHIR elements must have a @value or children Example General: text/plain; charset=UTF-8, image/png
language	Σ	0..1	code	Human language of the content (BCP-47) Binding: ?? (required): left: A human language.; right: IETF language tag for a human language. ele-1: All FHIR elements must have a @value or children Example General: en-AU
data	S	0..1	base64Binary	Data inline, base64ed ele-1: All FHIR elements must have a @value or children
url	SΣ	0..1	url	Uri where the data can be found ele-1: All FHIR elements must have a @value or children Example General: http://www.acme.com/logo-small.png
size	Σ	0..1		Number of bytes of content (if url provided) ele-1: All FHIR elements must have a @value or children
size			unsignedInt
size			integer64
hash	Σ	0..1	base64Binary	Hash of the data (sha-1, base64ed) ele-1: All FHIR elements must have a @value or children
title	SΣ	0..1	string	left: Label to display in place of the data; right: Document file name including the file extension ele-1: All FHIR elements must have a @value or children Example General: Official Corporate Logo
creation	Σ	0..1	dateTime	Date attachment was first created ele-1: All FHIR elements must have a @value or children
height		0..1	positiveInt	Height of the image in pixels (photo/video) ele-1: All FHIR elements must have a @value or children
width		0..1	positiveInt	Width of the image in pixels (photo/video) ele-1: All FHIR elements must have a @value or children
frames		0..1	positiveInt	Number of frames if > 1 (photo) ele-1: All FHIR elements must have a @value or children
duration		0..1	decimal	Length in seconds (audio / video) ele-1: All FHIR elements must have a @value or children
pages		0..1	positiveInt	Number of printed pages ele-1: All FHIR elements must have a @value or children
format	SΣ	0..1	Coding	Format/content rules for the document Binding: ?? (extensible) ele-1: All FHIR elements must have a @value or children
profile	Σ	0..*	BackboneElement	Content profile rules for the document ele-1: All FHIR elements must have a @value or children
context	SΣ	0..*		left: Clinical context of document; right: Context of the document content ele-1: All FHIR elements must have a @value or children
context:All Types				Content/Rules for all Types
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
encounter	S	0..1	Reference(US Core Encounter Profile)	Context of the document content ele-1: All FHIR elements must have a @value or children
event		0..*	CodeableConcept	Main clinical acts documented Binding: ?? (example): This list of codes represents the main clinical acts being documented. ele-1: All FHIR elements must have a @value or children
period	SΣ	0..1	Period	Time of service that is being documented ele-1: All FHIR elements must have a @value or children
facilityType		0..1	CodeableConcept	Kind of facility where patient was seen Binding: ?? (example): XDS Facility Type. ele-1: All FHIR elements must have a @value or children
practiceSetting		0..1	CodeableConcept	Additional details about where the content was created (e.g. clinical specialty) Binding: ?? (example): Additional details about where the content was created (e.g. clinical specialty). ele-1: All FHIR elements must have a @value or children
sourcePatientInfo		0..1	Reference(Patient)	Patient demographics from source ele-1: All FHIR elements must have a @value or children
related		0..*	Reference(Resource)	Related identifiers or resources ele-1: All FHIR elements must have a @value or children
context			BackboneElement
context			Reference(Appointment | Encounter | EpisodeOfCare)
version	Σ	0..1	string	An explicitly assigned identifer of a variation of the content in the DocumentReference ele-1: All FHIR elements must have a @value or children
basedOn		0..*	Reference(Appointment | AppointmentResponse | CarePlan | Claim | CommunicationRequest | Contract | CoverageEligibilityRequest | DeviceRequest | EnrollmentRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | RequestOrchestration | ServiceRequest | SupplyRequest | VisionPrescription)	Procedure that caused this media to be created ele-1: All FHIR elements must have a @value or children
modality	Σ	0..*	CodeableConcept	Imaging modality used Binding: ?? (extensible): Type of acquired data in the instance. ele-1: All FHIR elements must have a @value or children
event		0..*	CodeableReference()	Main clinical acts documented Binding: ?? (example): This list of codes represents the main clinical acts being documented. ele-1: All FHIR elements must have a @value or children
bodySite	Σ	0..*	CodeableReference(BodyStructure)	Body part included Binding: ?? (example): SNOMED CT Body site concepts ele-1: All FHIR elements must have a @value or children
facilityType	C	0..1	CodeableConcept	Kind of facility where patient was seen Binding: ?? (example): XDS Facility Type. ele-1: All FHIR elements must have a @value or children
practiceSetting	C	0..1	CodeableConcept	Additional details about where the content was created (e.g. clinical specialty) Binding: ?? (example): Additional details about where the content was created (e.g. clinical specialty). ele-1: All FHIR elements must have a @value or children
period	Σ	0..1	Period	Time of service that is being documented ele-1: All FHIR elements must have a @value or children
attester		0..*	BackboneElement	Attests to accuracy of the document ele-1: All FHIR elements must have a @value or children
Documentation for this format