WHO Digital Documentation of COVID-19 Certificates (DDCC)
1.0.0 - CI Build International flag

WHO Digital Documentation of COVID-19 Certificates (DDCC), published by WHO. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/WorldHealthOrganization/ddcc/ and changes regularly. See the Directory of published versions

Resource Profile: DDCCDocumentReferenceQR - Detailed Descriptions

Draft as of 2024-10-17

Definitions for the DDCCDocumentReferenceQR resource profile.

Guidance on how to interpret the contents of this table can be found here

0. DocumentReference
2. DocumentReference.type
Control1..?
BindingUnless not suitable, these codes SHALL be taken from DDCC QR Type Codes
(extensible to http://smart.who.int/ddcc/ValueSet/DDCCQRTypeValueSet)
Must Supporttrue
4. DocumentReference.subject
TypeReference(DDCC Patient)
6. DocumentReference.authenticator
Control1..?
TypeReference(DDCC Organization)
Must Supporttrue
8. DocumentReference.content
Control2..?
Must Supporttrue
SlicingThis element introduces a set of slices on DocumentReference.content. The slices areUnordered and Closed, and can be differentiated using the following discriminators:
  • value @ format
  • 10. DocumentReference.content.format
    BindingUnless not suitable, these codes SHALL be taken from DDCC QR Format Codes
    (extensible to http://smart.who.int/ddcc/ValueSet/DDCCQRFormatValueSet)
    12. DocumentReference.content:qrImage
    Slice NameqrImage
    Control1..*
    Must Supporttrue
    14. DocumentReference.content:qrImage.attachment
    16. DocumentReference.content:qrImage.attachment.contentType
    Control1..?
    Must Supporttrue
    18. DocumentReference.content:qrImage.attachment.data
    Control1..?
    Must Supporttrue
    20. DocumentReference.content:qrImage.format
    Control1..?
    Pattern Value{
      "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
      "code" : "image"
    }
    22. DocumentReference.content:qrContent
    Slice NameqrContent
    Control1..1
    Must Supporttrue
    24. DocumentReference.content:qrContent.attachment
    26. DocumentReference.content:qrContent.attachment.contentType
    Control1..?
    Must Supporttrue
    28. DocumentReference.content:qrContent.attachment.data
    Control1..?
    Must Supporttrue
    30. DocumentReference.content:qrContent.format
    Control1..?
    Pattern Value{
      "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
      "code" : "serialized"
    }
    32. DocumentReference.content:qrPDF
    Slice NameqrPDF
    Control0..1
    Must Supporttrue
    34. DocumentReference.content:qrPDF.attachment
    36. DocumentReference.content:qrPDF.attachment.contentType
    Control1..?
    Must Supporttrue
    38. DocumentReference.content:qrPDF.attachment.data
    Control1..?
    Must Supporttrue
    40. DocumentReference.content:qrPDF.format
    Control1..?
    Pattern Value{
      "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
      "code" : "pdf"
    }

    Guidance on how to interpret the contents of this table can be found here

    0. DocumentReference
    Definition

    A reference to a document of any kind for any purpose. Provides metadata about the document so that the document can be discovered and managed. The scope of a document is any seralized object with a mime-type, so includes formal patient centric documents (CDA), cliical notes, scanned paper, and non-patient specific documents like policy text.

    ShortA reference to a document
    Comments

    Usually, this is used for documents other than those defined by FHIR.

    Control0..*
    Is Modifierfalse
    Summaryfalse
    Invariantsdom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (contained.contained.empty())
    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 (contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty())
    dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (contained.meta.versionId.empty() and contained.meta.lastUpdated.empty())
    dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (contained.meta.security.empty())
    dom-6: A resource should have narrative for robust management (text.`div`.exists())
    2. DocumentReference.implicitRules
    Definition

    A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

    ShortA set of rules under which this content was created
    Comments

    Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.

    Control0..1
    Typeuri
    Is Modifiertrue because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    4. DocumentReference.modifierExtension
    Definition

    May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

    ShortExtensions that cannot be ignored
    Comments

    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

    Control0..*
    TypeExtension
    Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
    Summaryfalse
    Requirements

    Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

    Alternate Namesextensions, user content
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    6. DocumentReference.status
    Definition

    The status of this document reference.

    Shortcurrent | superseded | entered-in-error
    Comments

    This is the status of the DocumentReference object, which might be independent from the docStatus element.

    This element is labeled as a modifier because the status contains the codes that mark the document or reference as not currently valid.

    Control1..1
    BindingThe codes SHALL be taken from DocumentReferenceStatushttp://hl7.org/fhir/ValueSet/document-reference-status|4.0.1
    (required to http://hl7.org/fhir/ValueSet/document-reference-status|4.0.1)

    The status of the document reference.

    Typecode
    Is Modifiertrue because This element is labelled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    8. DocumentReference.type
    Definition

    Specifies the particular kind of document referenced (e.g. History and Physical, Discharge Summary, Progress Note). This usually equates to the purpose of making the document referenced.

    ShortKind of document (LOINC if possible)
    Comments

    Key metadata element describing the document that describes he exact type of document. Helps humans to assess whether the document is of interest when viewing a list of documents.

    Control10..1
    BindingUnless not suitable, these codes SHALL be taken from The codes SHOULD be taken from DDCC QR Type Codeshttp://hl7.org/fhir/ValueSet/c80-doc-typecodes
    (extensible to http://smart.who.int/ddcc/ValueSet/DDCCQRTypeValueSet)
    TypeCodeableConcept
    Is Modifierfalse
    Must Supporttrue
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    10. DocumentReference.subject
    Definition

    Who or what the document is about. The document can be about a person, (patient or healthcare practitioner), a device (e.g. a machine) or even a group of subjects (such as a document about a herd of farm animals, or a set of patients that share a common exposure).

    ShortWho/what is the subject of the document
    Control0..1
    TypeReference(DDCC Patient, Patient, Practitioner, Group, Device)
    Is Modifierfalse
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    12. DocumentReference.authenticator
    Definition

    Which person or organization authenticates that this document is valid.

    ShortWho/what authenticated the document
    Comments

    Represents a participant within the author institution who has legally authenticated or attested the document. Legal authentication implies that a document has been signed manually or electronically by the legal Authenticator.

    Control10..1
    TypeReference(DDCC Organization, Practitioner, PractitionerRole, Organization)
    Is Modifierfalse
    Must Supporttrue
    Summaryfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    14. DocumentReference.content
    Definition

    The document and format referenced. There may be multiple content element repetitions, each with a different format.

    ShortDocument referenced
    Control21..*
    TypeBackboneElement
    Is Modifierfalse
    Must Supporttrue
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    SlicingThis element introduces a set of slices on DocumentReference.content. The slices areUnordered and Closed, and can be differentiated using the following discriminators:
    • value @ format
    • 16. DocumentReference.content.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored even if unrecognized
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
      Summarytrue
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content, modifiers
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      18. DocumentReference.content.attachment
      Definition

      The document or URL of the document along with critical metadata to prove content has integrity.

      ShortWhere to access the document
      Control1..1
      TypeAttachment
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      20. DocumentReference.content.format
      Definition

      An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

      ShortFormat/content rules for the document
      Comments

      Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

      Control0..1
      BindingUnless not suitable, these codes SHALL be taken from The codes SHOULD be taken from DDCC QR Format Codeshttp://hl7.org/fhir/ValueSet/formatcodes
      (extensible to http://smart.who.int/ddcc/ValueSet/DDCCQRFormatValueSet)
      TypeCoding
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      22. DocumentReference.content:qrImage
      Slice NameqrImage
      Definition

      The document and format referenced. There may be multiple content element repetitions, each with a different format.

      ShortDocument referenced
      Control1..*
      TypeBackboneElement
      Is Modifierfalse
      Must Supporttrue
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      24. DocumentReference.content:qrImage.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored even if unrecognized
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
      Summarytrue
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content, modifiers
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      26. DocumentReference.content:qrImage.attachment
      Definition

      The document or URL of the document along with critical metadata to prove content has integrity.

      ShortWhere to access the document
      Control1..1
      TypeAttachment
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      28. DocumentReference.content:qrImage.attachment.contentType
      Definition

      Identifies the type of the data in the attachment and allows a method to be chosen to interpret or render the data. Includes mime type parameters such as charset where appropriate.

      ShortMime type of the content, with charset etc.
      Control10..1
      BindingThe codes SHALL be taken from Mime Typeshttp://hl7.org/fhir/ValueSet/mimetypes|4.0.1
      (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1)

      The mime type of an attachment. Any valid mime type is allowed.

      Typecode
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Must Supporttrue
      Summarytrue
      Requirements

      Processors of the data need to be able to know how to interpret the data.

      Example<br/><b>General</b>:text/plain; charset=UTF-8, image/png
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      30. DocumentReference.content:qrImage.attachment.data
      Definition

      The actual data of the attachment - a sequence of bytes, base64 encoded.

      ShortData inline, base64ed
      Comments

      The base64-encoded data SHALL be expressed in the same character set as the base resource XML or JSON.

      Control10..1
      Typebase64Binary
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Must Supporttrue
      Summaryfalse
      Requirements

      The data needs to able to be transmitted inline.

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      32. DocumentReference.content:qrImage.format
      Definition

      An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

      ShortFormat/content rules for the document
      Comments

      Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

      Control10..1
      BindingThe codes SHOULD be taken from DocumentReferenceFormatCodeSethttp://hl7.org/fhir/ValueSet/formatcodes
      (preferred to http://hl7.org/fhir/ValueSet/formatcodes)

      Document Format Codes.

      TypeCoding
      Is Modifierfalse
      Summarytrue
      Pattern Value{
        "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
        "code" : "image"
      }
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      34. DocumentReference.content:qrContent
      Slice NameqrContent
      Definition

      The document and format referenced. There may be multiple content element repetitions, each with a different format.

      ShortDocument referenced
      Control1..1*
      TypeBackboneElement
      Is Modifierfalse
      Must Supporttrue
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      36. DocumentReference.content:qrContent.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored even if unrecognized
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
      Summarytrue
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content, modifiers
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      38. DocumentReference.content:qrContent.attachment
      Definition

      The document or URL of the document along with critical metadata to prove content has integrity.

      ShortWhere to access the document
      Control1..1
      TypeAttachment
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      40. DocumentReference.content:qrContent.attachment.contentType
      Definition

      Identifies the type of the data in the attachment and allows a method to be chosen to interpret or render the data. Includes mime type parameters such as charset where appropriate.

      ShortMime type of the content, with charset etc.
      Control10..1
      BindingThe codes SHALL be taken from Mime Typeshttp://hl7.org/fhir/ValueSet/mimetypes|4.0.1
      (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1)

      The mime type of an attachment. Any valid mime type is allowed.

      Typecode
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Must Supporttrue
      Summarytrue
      Requirements

      Processors of the data need to be able to know how to interpret the data.

      Example<br/><b>General</b>:text/plain; charset=UTF-8, image/png
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      42. DocumentReference.content:qrContent.attachment.data
      Definition

      The actual data of the attachment - a sequence of bytes, base64 encoded.

      ShortData inline, base64ed
      Comments

      The base64-encoded data SHALL be expressed in the same character set as the base resource XML or JSON.

      Control10..1
      Typebase64Binary
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Must Supporttrue
      Summaryfalse
      Requirements

      The data needs to able to be transmitted inline.

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      44. DocumentReference.content:qrContent.format
      Definition

      An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

      ShortFormat/content rules for the document
      Comments

      Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

      Control10..1
      BindingThe codes SHOULD be taken from DocumentReferenceFormatCodeSethttp://hl7.org/fhir/ValueSet/formatcodes
      (preferred to http://hl7.org/fhir/ValueSet/formatcodes)

      Document Format Codes.

      TypeCoding
      Is Modifierfalse
      Summarytrue
      Pattern Value{
        "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
        "code" : "serialized"
      }
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      46. DocumentReference.content:qrPDF
      Slice NameqrPDF
      Definition

      The document and format referenced. There may be multiple content element repetitions, each with a different format.

      ShortDocument referenced
      Control01..1*
      TypeBackboneElement
      Is Modifierfalse
      Must Supporttrue
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      48. DocumentReference.content:qrPDF.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored even if unrecognized
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
      Summarytrue
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content, modifiers
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      50. DocumentReference.content:qrPDF.attachment
      Definition

      The document or URL of the document along with critical metadata to prove content has integrity.

      ShortWhere to access the document
      Control1..1
      TypeAttachment
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      52. DocumentReference.content:qrPDF.attachment.contentType
      Definition

      Identifies the type of the data in the attachment and allows a method to be chosen to interpret or render the data. Includes mime type parameters such as charset where appropriate.

      ShortMime type of the content, with charset etc.
      Control10..1
      BindingThe codes SHALL be taken from Mime Typeshttp://hl7.org/fhir/ValueSet/mimetypes|4.0.1
      (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1)

      The mime type of an attachment. Any valid mime type is allowed.

      Typecode
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Must Supporttrue
      Summarytrue
      Requirements

      Processors of the data need to be able to know how to interpret the data.

      Example<br/><b>General</b>:text/plain; charset=UTF-8, image/png
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      54. DocumentReference.content:qrPDF.attachment.data
      Definition

      The actual data of the attachment - a sequence of bytes, base64 encoded.

      ShortData inline, base64ed
      Comments

      The base64-encoded data SHALL be expressed in the same character set as the base resource XML or JSON.

      Control10..1
      Typebase64Binary
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Must Supporttrue
      Summaryfalse
      Requirements

      The data needs to able to be transmitted inline.

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      56. DocumentReference.content:qrPDF.format
      Definition

      An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

      ShortFormat/content rules for the document
      Comments

      Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

      Control10..1
      BindingThe codes SHOULD be taken from DocumentReferenceFormatCodeSethttp://hl7.org/fhir/ValueSet/formatcodes
      (preferred to http://hl7.org/fhir/ValueSet/formatcodes)

      Document Format Codes.

      TypeCoding
      Is Modifierfalse
      Summarytrue
      Pattern Value{
        "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
        "code" : "pdf"
      }
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

      Guidance on how to interpret the contents of this table can be found here

      0. DocumentReference
      Definition

      A reference to a document of any kind for any purpose. Provides metadata about the document so that the document can be discovered and managed. The scope of a document is any seralized object with a mime-type, so includes formal patient centric documents (CDA), cliical notes, scanned paper, and non-patient specific documents like policy text.

      ShortA reference to a document
      Comments

      Usually, this is used for documents other than those defined by FHIR.

      Control0..*
      Is Modifierfalse
      Summaryfalse
      Invariantsdom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (contained.contained.empty())
      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 (contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty())
      dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (contained.meta.versionId.empty() and contained.meta.lastUpdated.empty())
      dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (contained.meta.security.empty())
      dom-6: A resource should have narrative for robust management (text.`div`.exists())
      2. DocumentReference.id
      Definition

      The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.

      ShortLogical id of this artifact
      Comments

      The only time that a resource does not have an id is when it is being submitted to the server using a create operation.

      Control0..1
      Typeid
      Is Modifierfalse
      Summarytrue
      4. DocumentReference.meta
      Definition

      The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.

      ShortMetadata about the resource
      Control0..1
      TypeMeta
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      6. DocumentReference.implicitRules
      Definition

      A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

      ShortA set of rules under which this content was created
      Comments

      Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.

      Control0..1
      Typeuri
      Is Modifiertrue because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      8. DocumentReference.language
      Definition

      The base language in which the resource is written.

      ShortLanguage of the resource content
      Comments

      Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).

      Control0..1
      BindingThe codes SHOULD be taken from CommonLanguages
      (preferred to http://hl7.org/fhir/ValueSet/languages)

      A human language.

      Additional BindingsPurpose
      AllLanguagesMax Binding
      Typecode
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summaryfalse
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      10. DocumentReference.text
      Definition

      A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.

      ShortText summary of the resource, for human interpretation
      Comments

      Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.

      Control0..1
      TypeNarrative
      Is Modifierfalse
      Summaryfalse
      Alternate Namesnarrative, html, xhtml, display
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      12. DocumentReference.contained
      Definition

      These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.

      ShortContained, inline Resources
      Comments

      This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels.

      Control0..*
      TypeResource
      Is Modifierfalse
      Summaryfalse
      Alternate Namesinline resources, anonymous resources, contained resources
      14. DocumentReference.extension
      Definition

      May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

      ShortAdditional content defined by implementations
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifierfalse
      Summaryfalse
      Alternate Namesextensions, user content
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      16. DocumentReference.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
      Summaryfalse
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      18. DocumentReference.masterIdentifier
      Definition

      Document identifier as assigned by the source of the document. This identifier is specific to this version of the document. This unique identifier may be used elsewhere to identify this version of the document.

      ShortMaster Version Specific Identifier
      Comments

      CDA Document Id extension and root.

      Control0..1
      TypeIdentifier
      Is Modifierfalse
      Summarytrue
      Requirements

      The structure and format of this Id shall be consistent with the specification corresponding to the formatCode attribute. (e.g. for a DICOM standard document a 64-character numeric UID, for an HL7 CDA format a serialization of the CDA Document Id extension and root in the form "oid^extension", where OID is a 64 digits max, and the Id is a 16 UTF-8 char max. If the OID is coded without the extension then the '^' character shall not be included.).

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      20. DocumentReference.identifier
      Definition

      Other identifiers associated with the document, including version independent identifiers.

      ShortOther identifiers for the document
      NoteThis is a business identifier, not a resource identifier (see discussion)
      Control0..*
      TypeIdentifier
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      22. DocumentReference.status
      Definition

      The status of this document reference.

      Shortcurrent | superseded | entered-in-error
      Comments

      This is the status of the DocumentReference object, which might be independent from the docStatus element.

      This element is labeled as a modifier because the status contains the codes that mark the document or reference as not currently valid.

      Control1..1
      BindingThe codes SHALL be taken from DocumentReferenceStatus
      (required to http://hl7.org/fhir/ValueSet/document-reference-status|4.0.1)

      The status of the document reference.

      Typecode
      Is Modifiertrue because This element is labelled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      24. DocumentReference.docStatus
      Definition

      The status of the underlying document.

      Shortpreliminary | final | amended | entered-in-error
      Comments

      The document that is pointed to might be in various lifecycle states.

      Control0..1
      BindingThe codes SHALL be taken from CompositionStatus
      (required to http://hl7.org/fhir/ValueSet/composition-status|4.0.1)

      Status of the underlying document.

      Typecode
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      26. DocumentReference.type
      Definition

      Specifies the particular kind of document referenced (e.g. History and Physical, Discharge Summary, Progress Note). This usually equates to the purpose of making the document referenced.

      ShortKind of document (LOINC if possible)
      Comments

      Key metadata element describing the document that describes he exact type of document. Helps humans to assess whether the document is of interest when viewing a list of documents.

      Control1..1
      BindingUnless not suitable, these codes SHALL be taken from DDCC QR Type Codes
      (extensible to http://smart.who.int/ddcc/ValueSet/DDCCQRTypeValueSet)
      TypeCodeableConcept
      Is Modifierfalse
      Must Supporttrue
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      28. DocumentReference.category
      Definition

      A categorization for the type of document referenced - helps for indexing and searching. This may be implied by or derived from the code specified in the DocumentReference.type.

      ShortCategorization of document
      Comments

      Key metadata element describing the the category or classification of the document. This is a broader perspective that groups similar documents based on how they would be used. This is a primary key used in searching.

      Control0..*
      BindingFor example codes, see DocumentClassValueSet
      (example to http://hl7.org/fhir/ValueSet/document-classcodes)

      High-level kind of a clinical document at a macro level.

      TypeCodeableConcept
      Is Modifierfalse
      Summarytrue
      Alternate Namesclaxs
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      30. DocumentReference.subject
      Definition

      Who or what the document is about. The document can be about a person, (patient or healthcare practitioner), a device (e.g. a machine) or even a group of subjects (such as a document about a herd of farm animals, or a set of patients that share a common exposure).

      ShortWho/what is the subject of the document
      Control0..1
      TypeReference(DDCC Patient)
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      32. DocumentReference.date
      Definition

      When the document reference was created.

      ShortWhen this document reference was created
      Comments

      Referencing/indexing time is used for tracking, organizing versions and searching.

      Control0..1
      Typeinstant
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summarytrue
      Alternate Namesindexed
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      34. DocumentReference.author
      Definition

      Identifies who is responsible for adding the information to the document.

      ShortWho and/or what authored the document
      Comments

      Not necessarily who did the actual data entry (i.e. typist) or who was the source (informant).

      Control0..*
      TypeReference(Practitioner, PractitionerRole, Organization, Device, Patient, RelatedPerson)
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      36. DocumentReference.authenticator
      Definition

      Which person or organization authenticates that this document is valid.

      ShortWho/what authenticated the document
      Comments

      Represents a participant within the author institution who has legally authenticated or attested the document. Legal authentication implies that a document has been signed manually or electronically by the legal Authenticator.

      Control1..1
      TypeReference(DDCC Organization)
      Is Modifierfalse
      Must Supporttrue
      Summaryfalse
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      38. DocumentReference.custodian
      Definition

      Identifies the organization or group who is responsible for ongoing maintenance of and access to the document.

      ShortOrganization which maintains the document
      Comments

      Identifies the logical organization (software system, vendor, or department) to go to find the current version, where to report issues, etc. This is different from the physical location (URL, disk drive, or server) of the document, which is the technical location of the document, which host may be delegated to the management of some other organization.

      Control0..1
      TypeReference(Organization)
      Is Modifierfalse
      Summaryfalse
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      40. DocumentReference.relatesTo
      Definition

      Relationships that this document has with other document references that already exist.

      ShortRelationships to other documents
      Comments

      This element is labeled as a modifier because documents that append to other documents are incomplete on their own.

      Control0..*
      TypeBackboneElement
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      42. DocumentReference.relatesTo.id
      Definition

      Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

      ShortUnique id for inter-element referencing
      Control0..1
      Typestring
      Is Modifierfalse
      XML FormatIn the XML format, this property is represented as an attribute.
      Summaryfalse
      44. DocumentReference.relatesTo.extension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

      ShortAdditional content defined by implementations
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifierfalse
      Summaryfalse
      Alternate Namesextensions, user content
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      46. DocumentReference.relatesTo.modifierExtension
      Definition

      May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

      Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

      ShortExtensions that cannot be ignored even if unrecognized
      Comments

      There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

      Control0..*
      TypeExtension
      Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
      Summarytrue
      Requirements

      Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

      Alternate Namesextensions, user content, modifiers
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      48. DocumentReference.relatesTo.code
      Definition

      The type of relationship that this document has with anther document.

      Shortreplaces | transforms | signs | appends
      Comments

      If this document appends another document, then the document cannot be fully understood without also accessing the referenced document.

      Control1..1
      BindingThe codes SHALL be taken from DocumentRelationshipType
      (required to http://hl7.org/fhir/ValueSet/document-relationship-type|4.0.1)

      The type of relationship between documents.

      Typecode
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      50. DocumentReference.relatesTo.target
      Definition

      The target document of this relationship.

      ShortTarget of the relationship
      Control1..1
      TypeReference(DocumentReference)
      Is Modifierfalse
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      52. DocumentReference.description
      Definition

      Human-readable description of the source document.

      ShortHuman-readable description
      Comments

      What the document is about, a terse summary of the document.

      Control0..1
      Typestring
      Is Modifierfalse
      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
      Summarytrue
      Requirements

      Helps humans to assess whether the document is of interest.

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      54. DocumentReference.securityLabel
      Definition

      A set of Security-Tag codes specifying the level of privacy/security of the Document. Note that DocumentReference.meta.security contains the security labels of the "reference" to the document, while DocumentReference.securityLabel contains a snapshot of the security labels on the document the reference refers to.

      ShortDocument security-tags
      Comments

      The confidentiality codes can carry multiple vocabulary items. HL7 has developed an understanding of security and privacy tags that might be desirable in a Document Sharing environment, called HL7 Healthcare Privacy and Security Classification System (HCS). The following specification is recommended but not mandated, as the vocabulary bindings are an administrative domain responsibility. The use of this method is up to the policy domain such as the XDS Affinity Domain or other Trust Domain where all parties including sender and recipients are trusted to appropriately tag and enforce.

      In the HL7 Healthcare Privacy and Security Classification (HCS) there are code systems specific to Confidentiality, Sensitivity, Integrity, and Handling Caveats. Some values would come from a local vocabulary as they are related to workflow roles and special projects.

      Control0..*
      BindingUnless not suitable, these codes SHALL be taken from All Security Labels
      (extensible to http://hl7.org/fhir/ValueSet/security-labels)

      Security Labels from the Healthcare Privacy and Security Classification System.

      TypeCodeableConcept
      Is Modifierfalse
      Summarytrue
      Requirements

      Use of the Health Care Privacy/Security Classification (HCS) system of security-tag use is recommended.

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      56. DocumentReference.content
      Definition

      The document and format referenced. There may be multiple content element repetitions, each with a different format.

      ShortDocument referenced
      Control2..*
      TypeBackboneElement
      Is Modifierfalse
      Must Supporttrue
      Summarytrue
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      SlicingThis element introduces a set of slices on DocumentReference.content. The slices areUnordered and Closed, and can be differentiated using the following discriminators:
      • value @ format
      • 58. DocumentReference.content.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        60. DocumentReference.content.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        62. DocumentReference.content.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        64. DocumentReference.content.attachment
        Definition

        The document or URL of the document along with critical metadata to prove content has integrity.

        ShortWhere to access the document
        Control1..1
        TypeAttachment
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        66. DocumentReference.content.format
        Definition

        An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

        ShortFormat/content rules for the document
        Comments

        Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

        Control0..1
        BindingUnless not suitable, these codes SHALL be taken from DDCC QR Format Codes
        (extensible to http://smart.who.int/ddcc/ValueSet/DDCCQRFormatValueSet)
        TypeCoding
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        68. DocumentReference.content:qrImage
        Slice NameqrImage
        Definition

        The document and format referenced. There may be multiple content element repetitions, each with a different format.

        ShortDocument referenced
        Control1..*
        TypeBackboneElement
        Is Modifierfalse
        Must Supporttrue
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        70. DocumentReference.content:qrImage.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        72. DocumentReference.content:qrImage.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        74. DocumentReference.content:qrImage.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        76. DocumentReference.content:qrImage.attachment
        Definition

        The document or URL of the document along with critical metadata to prove content has integrity.

        ShortWhere to access the document
        Control1..1
        TypeAttachment
        Is Modifierfalse
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        78. DocumentReference.content:qrImage.attachment.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        80. DocumentReference.content:qrImage.attachment.extension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

        ShortAdditional content defined by implementations
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Alternate Namesextensions, user content
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        SlicingThis element introduces a set of slices on DocumentReference.content.attachment.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
        • value @ url
        • 82. DocumentReference.content:qrImage.attachment.contentType
          Definition

          Identifies the type of the data in the attachment and allows a method to be chosen to interpret or render the data. Includes mime type parameters such as charset where appropriate.

          ShortMime type of the content, with charset etc.
          Control1..1
          BindingThe codes SHALL be taken from Mime Types
          (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1)

          The mime type of an attachment. Any valid mime type is allowed.

          Typecode
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Must Supporttrue
          Summarytrue
          Requirements

          Processors of the data need to be able to know how to interpret the data.

          Example<br/><b>General</b>:text/plain; charset=UTF-8, image/png
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          84. DocumentReference.content:qrImage.attachment.language
          Definition

          The human language of the content. The value can be any valid value according to BCP 47.

          ShortHuman language of the content (BCP-47)
          Control0..1
          BindingThe codes SHOULD be taken from CommonLanguages
          (preferred to http://hl7.org/fhir/ValueSet/languages)

          A human language.

          Additional BindingsPurpose
          AllLanguagesMax Binding
          Typecode
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Summarytrue
          Requirements

          Users need to be able to choose between the languages in a set of attachments.

          Example<br/><b>General</b>:en-AU
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          86. DocumentReference.content:qrImage.attachment.data
          Definition

          The actual data of the attachment - a sequence of bytes, base64 encoded.

          ShortData inline, base64ed
          Comments

          The base64-encoded data SHALL be expressed in the same character set as the base resource XML or JSON.

          Control1..1
          Typebase64Binary
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Must Supporttrue
          Summaryfalse
          Requirements

          The data needs to able to be transmitted inline.

          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          88. DocumentReference.content:qrImage.attachment.url
          Definition

          A location where the data can be accessed.

          ShortUri where the data can be found
          Comments

          If both data and url are provided, the url SHALL point to the same content as the data contains. Urls may be relative references or may reference transient locations such as a wrapping envelope using cid: though this has ramifications for using signatures. Relative URLs are interpreted relative to the service url, like a resource reference, rather than relative to the resource itself. If a URL is provided, it SHALL resolve to actual data.

          Control0..1
          Typeurl
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Summarytrue
          Requirements

          The data needs to be transmitted by reference.

          Example<br/><b>General</b>:http://www.acme.com/logo-small.png
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          90. DocumentReference.content:qrImage.attachment.size
          Definition

          The number of bytes of data that make up this attachment (before base64 encoding, if that is done).

          ShortNumber of bytes of content (if url provided)
          Comments

          The number of bytes is redundant if the data is provided as a base64binary, but is useful if the data is provided as a url reference.

          Control0..1
          TypeunsignedInt
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Summarytrue
          Requirements

          Representing the size allows applications to determine whether they should fetch the content automatically in advance, or refuse to fetch it at all.

          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          92. DocumentReference.content:qrImage.attachment.hash
          Definition

          The calculated hash of the data using SHA-1. Represented using base64.

          ShortHash of the data (sha-1, base64ed)
          Comments

          The hash is calculated on the data prior to base64 encoding, if the data is based64 encoded. The hash is not intended to support digital signatures. Where protection against malicious threats a digital signature should be considered, see Provenance.signature for mechanism to protect a resource with a digital signature.

          Control0..1
          Typebase64Binary
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Summarytrue
          Requirements

          Included so that applications can verify that the contents of a location have not changed due to technical failures (e.g., storage rot, transport glitch, incorrect version).

          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          94. DocumentReference.content:qrImage.attachment.title
          Definition

          A label or set of text to display in place of the data.

          ShortLabel to display in place of the data
          Control0..1
          Typestring
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Summarytrue
          Requirements

          Applications need a label to display to a human user in place of the actual data if the data cannot be rendered or perceived by the viewer.

          Example<br/><b>General</b>:Official Corporate Logo
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          96. DocumentReference.content:qrImage.attachment.creation
          Definition

          The date that the attachment was first created.

          ShortDate attachment was first created
          Control0..1
          TypedateTime
          Is Modifierfalse
          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
          Summarytrue
          Requirements

          This is often tracked as an integrity issue for use of the attachment.

          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          98. DocumentReference.content:qrImage.format
          Definition

          An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

          ShortFormat/content rules for the document
          Comments

          Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

          Control1..1
          BindingThe codes SHOULD be taken from DocumentReferenceFormatCodeSet
          (preferred to http://hl7.org/fhir/ValueSet/formatcodes)

          Document Format Codes.

          TypeCoding
          Is Modifierfalse
          Summarytrue
          Pattern Value{
            "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
            "code" : "image"
          }
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          100. DocumentReference.content:qrContent
          Slice NameqrContent
          Definition

          The document and format referenced. There may be multiple content element repetitions, each with a different format.

          ShortDocument referenced
          Control1..1
          TypeBackboneElement
          Is Modifierfalse
          Must Supporttrue
          Summarytrue
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          102. DocumentReference.content:qrContent.id
          Definition

          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

          ShortUnique id for inter-element referencing
          Control0..1
          Typestring
          Is Modifierfalse
          XML FormatIn the XML format, this property is represented as an attribute.
          Summaryfalse
          104. DocumentReference.content:qrContent.extension
          Definition

          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

          ShortAdditional content defined by implementations
          Comments

          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

          Control0..*
          TypeExtension
          Is Modifierfalse
          Summaryfalse
          Alternate Namesextensions, user content
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
          106. DocumentReference.content:qrContent.modifierExtension
          Definition

          May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

          Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

          ShortExtensions that cannot be ignored even if unrecognized
          Comments

          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

          Control0..*
          TypeExtension
          Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
          Summarytrue
          Requirements

          Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

          Alternate Namesextensions, user content, modifiers
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
          108. DocumentReference.content:qrContent.attachment
          Definition

          The document or URL of the document along with critical metadata to prove content has integrity.

          ShortWhere to access the document
          Control1..1
          TypeAttachment
          Is Modifierfalse
          Summarytrue
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          110. DocumentReference.content:qrContent.attachment.id
          Definition

          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

          ShortUnique id for inter-element referencing
          Control0..1
          Typestring
          Is Modifierfalse
          XML FormatIn the XML format, this property is represented as an attribute.
          Summaryfalse
          112. DocumentReference.content:qrContent.attachment.extension
          Definition

          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

          ShortAdditional content defined by implementations
          Comments

          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

          Control0..*
          TypeExtension
          Is Modifierfalse
          Summaryfalse
          Alternate Namesextensions, user content
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
          SlicingThis element introduces a set of slices on DocumentReference.content.attachment.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
          • value @ url
          • 114. DocumentReference.content:qrContent.attachment.contentType
            Definition

            Identifies the type of the data in the attachment and allows a method to be chosen to interpret or render the data. Includes mime type parameters such as charset where appropriate.

            ShortMime type of the content, with charset etc.
            Control1..1
            BindingThe codes SHALL be taken from Mime Types
            (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1)

            The mime type of an attachment. Any valid mime type is allowed.

            Typecode
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Must Supporttrue
            Summarytrue
            Requirements

            Processors of the data need to be able to know how to interpret the data.

            Example<br/><b>General</b>:text/plain; charset=UTF-8, image/png
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            116. DocumentReference.content:qrContent.attachment.language
            Definition

            The human language of the content. The value can be any valid value according to BCP 47.

            ShortHuman language of the content (BCP-47)
            Control0..1
            BindingThe codes SHOULD be taken from CommonLanguages
            (preferred to http://hl7.org/fhir/ValueSet/languages)

            A human language.

            Additional BindingsPurpose
            AllLanguagesMax Binding
            Typecode
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            Users need to be able to choose between the languages in a set of attachments.

            Example<br/><b>General</b>:en-AU
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            118. DocumentReference.content:qrContent.attachment.data
            Definition

            The actual data of the attachment - a sequence of bytes, base64 encoded.

            ShortData inline, base64ed
            Comments

            The base64-encoded data SHALL be expressed in the same character set as the base resource XML or JSON.

            Control1..1
            Typebase64Binary
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Must Supporttrue
            Summaryfalse
            Requirements

            The data needs to able to be transmitted inline.

            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            120. DocumentReference.content:qrContent.attachment.url
            Definition

            A location where the data can be accessed.

            ShortUri where the data can be found
            Comments

            If both data and url are provided, the url SHALL point to the same content as the data contains. Urls may be relative references or may reference transient locations such as a wrapping envelope using cid: though this has ramifications for using signatures. Relative URLs are interpreted relative to the service url, like a resource reference, rather than relative to the resource itself. If a URL is provided, it SHALL resolve to actual data.

            Control0..1
            Typeurl
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            The data needs to be transmitted by reference.

            Example<br/><b>General</b>:http://www.acme.com/logo-small.png
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            122. DocumentReference.content:qrContent.attachment.size
            Definition

            The number of bytes of data that make up this attachment (before base64 encoding, if that is done).

            ShortNumber of bytes of content (if url provided)
            Comments

            The number of bytes is redundant if the data is provided as a base64binary, but is useful if the data is provided as a url reference.

            Control0..1
            TypeunsignedInt
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            Representing the size allows applications to determine whether they should fetch the content automatically in advance, or refuse to fetch it at all.

            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            124. DocumentReference.content:qrContent.attachment.hash
            Definition

            The calculated hash of the data using SHA-1. Represented using base64.

            ShortHash of the data (sha-1, base64ed)
            Comments

            The hash is calculated on the data prior to base64 encoding, if the data is based64 encoded. The hash is not intended to support digital signatures. Where protection against malicious threats a digital signature should be considered, see Provenance.signature for mechanism to protect a resource with a digital signature.

            Control0..1
            Typebase64Binary
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            Included so that applications can verify that the contents of a location have not changed due to technical failures (e.g., storage rot, transport glitch, incorrect version).

            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            126. DocumentReference.content:qrContent.attachment.title
            Definition

            A label or set of text to display in place of the data.

            ShortLabel to display in place of the data
            Control0..1
            Typestring
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            Applications need a label to display to a human user in place of the actual data if the data cannot be rendered or perceived by the viewer.

            Example<br/><b>General</b>:Official Corporate Logo
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            128. DocumentReference.content:qrContent.attachment.creation
            Definition

            The date that the attachment was first created.

            ShortDate attachment was first created
            Control0..1
            TypedateTime
            Is Modifierfalse
            Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
            Summarytrue
            Requirements

            This is often tracked as an integrity issue for use of the attachment.

            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            130. DocumentReference.content:qrContent.format
            Definition

            An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

            ShortFormat/content rules for the document
            Comments

            Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

            Control1..1
            BindingThe codes SHOULD be taken from DocumentReferenceFormatCodeSet
            (preferred to http://hl7.org/fhir/ValueSet/formatcodes)

            Document Format Codes.

            TypeCoding
            Is Modifierfalse
            Summarytrue
            Pattern Value{
              "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
              "code" : "serialized"
            }
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            132. DocumentReference.content:qrPDF
            Slice NameqrPDF
            Definition

            The document and format referenced. There may be multiple content element repetitions, each with a different format.

            ShortDocument referenced
            Control0..1
            TypeBackboneElement
            Is Modifierfalse
            Must Supporttrue
            Summarytrue
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            134. DocumentReference.content:qrPDF.id
            Definition

            Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

            ShortUnique id for inter-element referencing
            Control0..1
            Typestring
            Is Modifierfalse
            XML FormatIn the XML format, this property is represented as an attribute.
            Summaryfalse
            136. DocumentReference.content:qrPDF.extension
            Definition

            May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

            ShortAdditional content defined by implementations
            Comments

            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

            Control0..*
            TypeExtension
            Is Modifierfalse
            Summaryfalse
            Alternate Namesextensions, user content
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
            138. DocumentReference.content:qrPDF.modifierExtension
            Definition

            May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

            Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

            ShortExtensions that cannot be ignored even if unrecognized
            Comments

            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

            Control0..*
            TypeExtension
            Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
            Summarytrue
            Requirements

            Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

            Alternate Namesextensions, user content, modifiers
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
            140. DocumentReference.content:qrPDF.attachment
            Definition

            The document or URL of the document along with critical metadata to prove content has integrity.

            ShortWhere to access the document
            Control1..1
            TypeAttachment
            Is Modifierfalse
            Summarytrue
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            142. DocumentReference.content:qrPDF.attachment.id
            Definition

            Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

            ShortUnique id for inter-element referencing
            Control0..1
            Typestring
            Is Modifierfalse
            XML FormatIn the XML format, this property is represented as an attribute.
            Summaryfalse
            144. DocumentReference.content:qrPDF.attachment.extension
            Definition

            May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

            ShortAdditional content defined by implementations
            Comments

            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

            Control0..*
            TypeExtension
            Is Modifierfalse
            Summaryfalse
            Alternate Namesextensions, user content
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
            SlicingThis element introduces a set of slices on DocumentReference.content.attachment.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
            • value @ url
            • 146. DocumentReference.content:qrPDF.attachment.contentType
              Definition

              Identifies the type of the data in the attachment and allows a method to be chosen to interpret or render the data. Includes mime type parameters such as charset where appropriate.

              ShortMime type of the content, with charset etc.
              Control1..1
              BindingThe codes SHALL be taken from Mime Types
              (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1)

              The mime type of an attachment. Any valid mime type is allowed.

              Typecode
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Must Supporttrue
              Summarytrue
              Requirements

              Processors of the data need to be able to know how to interpret the data.

              Example<br/><b>General</b>:text/plain; charset=UTF-8, image/png
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              148. DocumentReference.content:qrPDF.attachment.language
              Definition

              The human language of the content. The value can be any valid value according to BCP 47.

              ShortHuman language of the content (BCP-47)
              Control0..1
              BindingThe codes SHOULD be taken from CommonLanguages
              (preferred to http://hl7.org/fhir/ValueSet/languages)

              A human language.

              Additional BindingsPurpose
              AllLanguagesMax Binding
              Typecode
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Users need to be able to choose between the languages in a set of attachments.

              Example<br/><b>General</b>:en-AU
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              150. DocumentReference.content:qrPDF.attachment.data
              Definition

              The actual data of the attachment - a sequence of bytes, base64 encoded.

              ShortData inline, base64ed
              Comments

              The base64-encoded data SHALL be expressed in the same character set as the base resource XML or JSON.

              Control1..1
              Typebase64Binary
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Must Supporttrue
              Summaryfalse
              Requirements

              The data needs to able to be transmitted inline.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              152. DocumentReference.content:qrPDF.attachment.url
              Definition

              A location where the data can be accessed.

              ShortUri where the data can be found
              Comments

              If both data and url are provided, the url SHALL point to the same content as the data contains. Urls may be relative references or may reference transient locations such as a wrapping envelope using cid: though this has ramifications for using signatures. Relative URLs are interpreted relative to the service url, like a resource reference, rather than relative to the resource itself. If a URL is provided, it SHALL resolve to actual data.

              Control0..1
              Typeurl
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              The data needs to be transmitted by reference.

              Example<br/><b>General</b>:http://www.acme.com/logo-small.png
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              154. DocumentReference.content:qrPDF.attachment.size
              Definition

              The number of bytes of data that make up this attachment (before base64 encoding, if that is done).

              ShortNumber of bytes of content (if url provided)
              Comments

              The number of bytes is redundant if the data is provided as a base64binary, but is useful if the data is provided as a url reference.

              Control0..1
              TypeunsignedInt
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Representing the size allows applications to determine whether they should fetch the content automatically in advance, or refuse to fetch it at all.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              156. DocumentReference.content:qrPDF.attachment.hash
              Definition

              The calculated hash of the data using SHA-1. Represented using base64.

              ShortHash of the data (sha-1, base64ed)
              Comments

              The hash is calculated on the data prior to base64 encoding, if the data is based64 encoded. The hash is not intended to support digital signatures. Where protection against malicious threats a digital signature should be considered, see Provenance.signature for mechanism to protect a resource with a digital signature.

              Control0..1
              Typebase64Binary
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Included so that applications can verify that the contents of a location have not changed due to technical failures (e.g., storage rot, transport glitch, incorrect version).

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              158. DocumentReference.content:qrPDF.attachment.title
              Definition

              A label or set of text to display in place of the data.

              ShortLabel to display in place of the data
              Control0..1
              Typestring
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Applications need a label to display to a human user in place of the actual data if the data cannot be rendered or perceived by the viewer.

              Example<br/><b>General</b>:Official Corporate Logo
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              160. DocumentReference.content:qrPDF.attachment.creation
              Definition

              The date that the attachment was first created.

              ShortDate attachment was first created
              Control0..1
              TypedateTime
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              This is often tracked as an integrity issue for use of the attachment.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              162. DocumentReference.content:qrPDF.format
              Definition

              An identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType.

              ShortFormat/content rules for the document
              Comments

              Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI.

              Control1..1
              BindingThe codes SHOULD be taken from DocumentReferenceFormatCodeSet
              (preferred to http://hl7.org/fhir/ValueSet/formatcodes)

              Document Format Codes.

              TypeCoding
              Is Modifierfalse
              Summarytrue
              Pattern Value{
                "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCQRFormatCodeSystem",
                "code" : "pdf"
              }
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              164. DocumentReference.context
              Definition

              The clinical context in which the document was prepared.

              ShortClinical context of document
              Comments

              These values are primarily added to help with searching for interesting/relevant documents.

              Control0..1
              TypeBackboneElement
              Is Modifierfalse
              Summarytrue
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              166. DocumentReference.context.id
              Definition

              Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

              ShortUnique id for inter-element referencing
              Control0..1
              Typestring
              Is Modifierfalse
              XML FormatIn the XML format, this property is represented as an attribute.
              Summaryfalse
              168. DocumentReference.context.extension
              Definition

              May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

              ShortAdditional content defined by implementations
              Comments

              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

              Control0..*
              TypeExtension
              Is Modifierfalse
              Summaryfalse
              Alternate Namesextensions, user content
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
              170. DocumentReference.context.modifierExtension
              Definition

              May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

              Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

              ShortExtensions that cannot be ignored even if unrecognized
              Comments

              There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

              Control0..*
              TypeExtension
              Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
              Summarytrue
              Requirements

              Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

              Alternate Namesextensions, user content, modifiers
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
              172. DocumentReference.context.encounter
              Definition

              Describes the clinical encounter or type of care that the document content is associated with.

              ShortContext of the document content
              Control0..*
              TypeReference(Encounter, EpisodeOfCare)
              Is Modifierfalse
              Summaryfalse
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              174. DocumentReference.context.event
              Definition

              This list of codes represents the main clinical acts, such as a colonoscopy or an appendectomy, being documented. In some cases, the event is inherent in the type Code, such as a "History and Physical Report" in which the procedure being documented is necessarily a "History and Physical" act.

              ShortMain clinical acts documented
              Comments

              An event can further specialize the act inherent in the type, such as where it is simply "Procedure Report" and the procedure was a "colonoscopy". If one or more event codes are included, they shall not conflict with the values inherent in the class or type elements as such a conflict would create an ambiguous situation.

              Control0..*
              BindingFor example codes, see v3 Code System ActCode
              (example to http://terminology.hl7.org/ValueSet/v3-ActCode)

              This list of codes represents the main clinical acts being documented.

              TypeCodeableConcept
              Is Modifierfalse
              Summaryfalse
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              176. DocumentReference.context.period
              Definition

              The time period over which the service that is described by the document was provided.

              ShortTime of service that is being documented
              Control0..1
              TypePeriod
              Is Modifierfalse
              Summarytrue
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              178. DocumentReference.context.facilityType
              Definition

              The kind of facility where the patient was seen.

              ShortKind of facility where patient was seen
              Control0..1
              BindingFor example codes, see FacilityTypeCodeValueSet
              (example to http://hl7.org/fhir/ValueSet/c80-facilitycodes)

              XDS Facility Type.

              TypeCodeableConcept
              Is Modifierfalse
              Summaryfalse
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              180. DocumentReference.context.practiceSetting
              Definition

              This property may convey specifics about the practice setting where the content was created, often reflecting the clinical specialty.

              ShortAdditional details about where the content was created (e.g. clinical specialty)
              Comments

              This element should be based on a coarse classification system for the class of specialty practice. Recommend the use of the classification system for Practice Setting, such as that described by the Subject Matter Domain in LOINC.

              Control0..1
              BindingFor example codes, see PracticeSettingCodeValueSet
              (example to http://hl7.org/fhir/ValueSet/c80-practice-codes)

              Additional details about where the content was created (e.g. clinical specialty).

              TypeCodeableConcept
              Is Modifierfalse
              Summaryfalse
              Requirements

              This is an important piece of metadata that providers often rely upon to quickly sort and/or filter out to find specific content.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              182. DocumentReference.context.sourcePatientInfo
              Definition

              The Patient Information as known when the document was published. May be a reference to a version specific, or contained.

              ShortPatient demographics from source
              Control0..1
              TypeReference(Patient)
              Is Modifierfalse
              Summaryfalse
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              184. DocumentReference.context.related
              Definition

              Related identifiers or resources associated with the DocumentReference.

              ShortRelated identifiers or resources
              Comments

              May be identifiers or resources that caused the DocumentReference or referenced Document to be created.

              Control0..*
              TypeReference(Resource)
              Is Modifierfalse
              Summaryfalse
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))