WHO Digital Documentation of COVID-19 Certificates (DDCC)
1.0.1 - release International flag

This page is part of the WHO Digital Documentation of COVID-19 Certificates (DDCC) (v1.0.1: releases Draft) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

Resource Profile: DDCCFolder - Detailed Descriptions

Active as of 2024-12-18

Definitions for the DDCCFolder resource profile.

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

0. List
2. List.extension
Control1..?
4. List.extension:designationType
Slice NamedesignationType
Control1..?
SlicingThis element introduces a set of slices on List.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • value @ valueCodeableConcept.coding.system
  • value @ valueCodeableConcept.coding.code
  • 6. List.extension:designationType/ddccDesignation
    Slice NamedesignationType/ddccDesignation
    Control1..1
    8. List.extension:designationType/ddccDesignation.value[x]
    [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
    10. List.extension:designationType/ddccDesignation.value[x].coding
    Control1..1
    Pattern Value{
      "system" : "http://smart.who.int/ddcc/CodeSystem/DDCCFolderDesignationTypeCodesystem",
      "code" : "ddcc"
    }
    12. List.subject
    Control1..?
    TypeReference(DDCC Patient)
    14. List.subject.reference
    Control1..?
    Must Supporttrue
    16. List.entry
    18. List.entry.item
    TypeReference(DDCC Document Reference)

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

    0. List
    Definition

    A list is a curated collection of resources.

    ShortA list is a curated collection of resources
    Control0..*
    Is Modifierfalse
    Summaryfalse
    Alternate NamesCollection, WorkingList, Organizer
    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())
    lst-1: A list can only have an emptyReason if it is empty (emptyReason.empty() or entry.empty())
    lst-2: The deleted flag can only be used if the mode of the list is "changes" (mode = 'changes' or entry.deleted.empty())
    lst-3: An entry date can only be used if the mode of the list is "working" (mode = 'working' or entry.date.empty())
    lst-1: A list can only have an emptyReason if it is empty (emptyReason.empty() or entry.empty())
    lst-2: The deleted flag can only be used if the mode of the list is "changes" (mode = 'changes' or entry.deleted.empty())
    lst-3: An entry date can only be used if the mode of the list is "working" (mode = 'working' or entry.date.empty())
    2. List.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. List.extension
    Definition

    An Extension


    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.

    ShortExtensionAdditional 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.

    Control10..*
    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 List.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
    • value @ url
    • 6. List.extension:designationType
      Slice NamedesignationType
      Definition

      Expresses contentType of submissionSet or the codeList of a Folder. Usually expressed in LOINC or SNOMED.

      ShortClinical code of the List
      Control1..*
      This element is affected by the following invariants: ele-1
      TypeExtension(Clinical code of the List) (Extension Type: CodeableConcept)
      Is Modifierfalse
      Must Supporttrue
      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())
      ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
      8. List.extension:designationType/ddccDesignation
      Slice NamedesignationType/ddccDesignation
      Definition

      An Extension

      ShortExtensionAdditional content defined by implementations
      Control10..1*
      TypeExtension
      Is Modifierfalse
      Summaryfalse
      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())
      10. List.extension:designationType/ddccDesignation.url
      Definition

      Source of the definition for the extension code - a logical name or a URL.

      Shortidentifies the meaning of the extension
      Comments

      The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.

      Control1..1
      Typeuri
      Is Modifierfalse
      XML FormatIn the XML format, this property is represented as an attribute.
      Summaryfalse
      12. List.modifierExtension
      Definition

      An Extension


      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).

      ShortExtensionExtensions 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..0*
      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())
      14. List.identifier
      Definition

      Identifier for the List assigned for business purposes outside the context of FHIR.

      ShortBusiness identifier
      NoteThis is a business identifier, not a resource identifier (see discussion)
      Control0..*
      TypeIdentifier
      Is Modifierfalse
      Summaryfalse
      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 List.identifier. The slices areUnordered and Open, and can be differentiated using the following discriminators:
      • value @ use
      • 16. List.identifier:uniqueId
        Slice NameuniqueId
        Definition

        An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers.


        Identifier for the List assigned for business purposes outside the context of FHIR.

        ShortAn identifier intended for computationBusiness identifier
        NoteThis is a business identifier, not a resource identifier (see discussion)
        Control0..1*
        This element is affected by the following invariants: ele-1
        TypeIdentifier(uniqueId Identifier)
        Is Modifierfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        18. List.identifier:entryUUID
        Slice NameentryUUID
        Definition

        An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers.


        Identifier for the List assigned for business purposes outside the context of FHIR.

        ShortAn identifier intended for computationBusiness identifier
        NoteThis is a business identifier, not a resource identifier (see discussion)
        Control0..*
        This element is affected by the following invariants: ele-1
        TypeIdentifier(entryUUID Identifier)
        Is Modifierfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        20. List.status
        Definition

        Indicates the current state of this list.

        Shortcurrent | retired | entered-in-error
        Comments

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

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

        The current state of the list.

        Typecode
        Is Modifiertrue because This element is labeled 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()))
        22. List.mode
        Definition

        How this list was prepared - whether it is a working list that is suitable for being maintained on an ongoing basis, or if it represents a snapshot of a list of items from another source, or whether it is a prepared list where items may be marked as added, modified or deleted.

        Shortworking | snapshot | changes
        Comments

        This element is labeled as a modifier because a change list must not be misunderstood as a complete list.

        Control1..1
        BindingThe codes SHALL be taken from ListModehttp://hl7.org/fhir/ValueSet/list-mode|4.0.1
        (required to http://hl7.org/fhir/ValueSet/list-mode|4.0.1)

        The processing mode that applies to this list.

        Typecode
        Is Modifiertrue because If set to "changes", the list is considered incomplete, while the other two codes indicate the list is complete, which changes the understanding of the elements listed
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summarytrue
        Requirements

        Lists are used in various ways, and it must be known in what way it is safe to use them.

        Pattern Valueworking
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        24. List.code
        Definition

        This code defines the purpose of the list - why it was created.

        ShortWhat the purpose of this list is
        Comments

        If there is no code, the purpose of the list is implied where it is used, such as in a document section using Document.section.code.

        Control10..1
        BindingThe codes SHALL be taken from For example codes, see MHD List Types ValueSethttp://hl7.org/fhir/ValueSet/list-example-codes
        (required to https://profiles.ihe.net/ITI/MHD/ValueSet/MHDlistTypesVS)
        TypeCodeableConcept
        Is Modifierfalse
        Summarytrue
        Requirements

        Lists often contain subsets of resources rather than an exhaustive list. The code identifies what type of subset is included.

        Pattern Value{
          "coding" : [{
            "system" : "https://profiles.ihe.net/ITI/MHD/CodeSystem/MHDlistTypes",
            "code" : "folder"
          }]
        }
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        26. List.subject
        Definition

        The common subject (or patient) of the resources that are in the list if there is one.

        ShortIf all resources have the same subject
        Comments

        Some purely arbitrary lists do not have a common subject, so this is optional.

        Control10..1
        TypeReference(DDCC Patient, Patient, Group, Device, Location)
        Is Modifierfalse
        Must Supporttrue
        Summarytrue
        Requirements

        The primary purpose of listing the subject explicitly is to help with finding the right list.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        28. List.subject.reference
        Definition

        A reference to a location at which the other resource is found. The reference may be a relative reference, in which case it is relative to the service base URL, or an absolute URL that resolves to the location where the resource is found. The reference may be version specific or not. If the reference is not to a FHIR RESTful server, then it should be assumed to be version specific. Internal fragment references (start with '#') refer to contained resources.

        ShortLiteral reference, Relative, internal or absolute URL
        Comments

        Using absolute URLs provides a stable scalable approach suitable for a cloud/web context, while using relative/logical references provides a flexible approach suitable for use when trading across closed eco-system boundaries. Absolute URLs do not need to point to a FHIR RESTful server, though this is the preferred approach. If the URL conforms to the structure "/[type]/[id]" then it should be assumed that the reference is to a FHIR RESTful server.

        Control10..1
        This element is affected by the following invariants: ref-1
        Typestring
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Must Supporttrue
        Summarytrue
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        30. List.encounter
        Definition

        The encounter that is the context in which this list was created.

        ShortContext in which list created
        Control0..01
        TypeReference(Encounter)
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        32. List.source
        Definition

        The entity responsible for deciding what the contents of the list were. Where the list was created by a human, this is the same as the author of the list.

        ShortWho and/or what defined the list contents (aka Author)
        Comments

        The primary source is the entity that made the decisions what items are in the list. This may be software or user.

        Control0..01
        TypeReference(Practitioner, PractitionerRole, Patient, Device)
        Is Modifierfalse
        Summarytrue
        Requirements

        Allows follow-up as well as context.

        Alternate NamesAuthor
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        34. List.orderedBy
        Definition

        What order applies to the items in the list.

        ShortWhat order the list has
        Comments

        Applications SHOULD render ordered lists in the order provided, but MAY allow users to re-order based on their own preferences as well. If there is no order specified, the order is unknown, though there may still be some order.

        Control0..01
        BindingThe codes SHOULD be taken from ListOrderCodeshttp://hl7.org/fhir/ValueSet/list-order
        (preferred to http://hl7.org/fhir/ValueSet/list-order)

        What order applies to the items in a list.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Requirements

        Important for presentation and rendering. Lists may be sorted to place more important information first or to group related entries.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        36. List.note
        Definition

        Comments that apply to the overall list.

        ShortComments about the list
        Control0..1*
        TypeAnnotation
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        38. List.emptyReason
        Definition

        If the list is empty, why the list is empty.

        ShortWhy list is empty
        Comments

        The various reasons for an empty list make a significant interpretation to its interpretation. Note that this code is for use when the entire list has been suppressed, and not for when individual items are omitted - implementers may consider using a text note or a flag on an entry in these cases.

        Control0..01
        This element is affected by the following invariants: lst-1
        BindingThe codes SHOULD be taken from ListEmptyReasonshttp://hl7.org/fhir/ValueSet/list-empty-reason
        (preferred to http://hl7.org/fhir/ValueSet/list-empty-reason)

        If a list is empty, why it is empty.

        TypeCodeableConcept
        Is Modifierfalse
        Summaryfalse
        Requirements

        Allows capturing things like "none exist" or "not asked" which can be important for most lists.

        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. List
        Definition

        A list is a curated collection of resources.

        ShortA list is a curated collection of resources
        Control0..*
        Is Modifierfalse
        Summaryfalse
        Alternate NamesCollection, WorkingList, Organizer
        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())
        lst-1: A list can only have an emptyReason if it is empty (emptyReason.empty() or entry.empty())
        lst-2: The deleted flag can only be used if the mode of the list is "changes" (mode = 'changes' or entry.deleted.empty())
        lst-3: An entry date can only be used if the mode of the list is "working" (mode = 'working' or entry.date.empty())
        2. List.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. List.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. List.meta.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
        8. List.meta.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 List.meta.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
        • value @ url
        • 10. List.meta.versionId
          Definition

          The version specific identifier, as it appears in the version portion of the URL. This value changes when the resource is created, updated, or deleted.

          ShortVersion specific identifier
          Comments

          The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.

          Control0..1
          Typeid
          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()))
          12. List.meta.lastUpdated
          Definition

          When the resource last changed - e.g. when the version changed.

          ShortWhen the resource version last changed
          Comments

          This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant. This is equivalent to the HTTP Last-Modified and SHOULD have the same value on a read interaction.

          Control0..1
          Typeinstant
          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()))
          14. List.meta.source
          Definition

          A uri that identifies the source system of the resource. This provides a minimal amount of Provenance information that can be used to track or differentiate the source of information in the resource. The source may identify another FHIR server, document, message, database, etc.

          ShortIdentifies where the resource comes from
          Comments

          In the provenance resource, this corresponds to Provenance.entity.what[x]. The exact use of the source (and the implied Provenance.entity.role) is left to implementer discretion. Only one nominated source is allowed; for additional provenance details, a full Provenance resource should be used.

          This element can be used to indicate where the current master source of a resource that has a canonical URL if the resource is no longer hosted at the canonical URL.

          Control0..1
          Typeuri
          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()))
          16. List.meta.profile
          Definition

          A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.

          ShortProfiles this resource claims to conform to
          Comments

          It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.

          Control0..*
          Typecanonical(StructureDefinition)
          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()))
          18. List.meta.security
          Definition

          Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.

          ShortSecurity Labels applied to this resource
          Comments

          The security labels can be updated without changing the stated version of the resource. The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.

          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.

          TypeCoding
          Is Modifierfalse
          Summarytrue
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          20. List.meta.tag
          Definition

          Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.

          ShortTags applied to this resource
          Comments

          The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.

          Control0..*
          BindingFor example codes, see CommonTags
          (example to http://hl7.org/fhir/ValueSet/common-tags)

          Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones".

          TypeCoding
          Is Modifierfalse
          Summarytrue
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          22. List.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()))
          24. List.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()))
          26. List.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()))
          28. List.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
          30. List.extension
          Definition

          An Extension

          ShortExtension
          Control1..*
          TypeExtension
          Is Modifierfalse
          Summaryfalse
          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 List.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
          • value @ url
          • 32. List.extension:designationType
            Slice NamedesignationType
            Definition

            Expresses contentType of submissionSet or the codeList of a Folder. Usually expressed in LOINC or SNOMED.

            ShortClinical code of the List
            Control1..*
            This element is affected by the following invariants: ele-1
            TypeExtension(Clinical code of the List) (Extension Type: CodeableConcept)
            Is Modifierfalse
            Must Supporttrue
            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())
            34. List.extension:designationType/ddccDesignation
            Slice NamedesignationType/ddccDesignation
            Definition

            An Extension

            ShortExtension
            Control1..1
            TypeExtension
            Is Modifierfalse
            Summaryfalse
            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())
            36. List.extension:designationType/ddccDesignation.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
            38. List.extension:designationType/ddccDesignation.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 List.extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
            • value @ url
            • 40. List.extension:designationType/ddccDesignation.url
              Definition

              Source of the definition for the extension code - a logical name or a URL.

              Shortidentifies the meaning of the extension
              Comments

              The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.

              Control1..1
              Typeuri
              Is Modifierfalse
              XML FormatIn the XML format, this property is represented as an attribute.
              Summaryfalse
              42. List.extension:designationType/ddccDesignation.value[x]
              Definition

              Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

              ShortValue of extension
              Control0..1
              TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
              [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
              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()))
              44. List.extension:designationType/ddccDesignation.value[x].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
              46. List.extension:designationType/ddccDesignation.value[x].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 List.extension.value[x].extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
              • value @ url
              • 48. List.modifierExtension
                Definition

                An Extension

                ShortExtension
                Control0..0
                TypeExtension
                Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
                Summaryfalse
                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. List.identifier
                Definition

                Identifier for the List assigned for business purposes outside the context of FHIR.

                ShortBusiness identifier
                NoteThis is a business identifier, not a resource identifier (see discussion)
                Control0..*
                TypeIdentifier
                Is Modifierfalse
                Summaryfalse
                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 List.identifier. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                • value @ use
                • 52. List.identifier:uniqueId
                  Slice NameuniqueId
                  Definition

                  An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers.

                  ShortAn identifier intended for computation
                  NoteThis is a business identifier, not a resource identifier (see discussion)
                  Control0..1
                  This element is affected by the following invariants: ele-1
                  TypeIdentifier(uniqueId Identifier)
                  Is Modifierfalse
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  54. List.identifier:entryUUID
                  Slice NameentryUUID
                  Definition

                  An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers.

                  ShortAn identifier intended for computation
                  NoteThis is a business identifier, not a resource identifier (see discussion)
                  Control0..*
                  This element is affected by the following invariants: ele-1
                  TypeIdentifier(entryUUID Identifier)
                  Is Modifierfalse
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  56. List.status
                  Definition

                  Indicates the current state of this list.

                  Shortcurrent | retired | entered-in-error
                  Comments

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

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

                  The current state of the list.

                  Typecode
                  Is Modifiertrue because This element is labeled 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()))
                  58. List.mode
                  Definition

                  How this list was prepared - whether it is a working list that is suitable for being maintained on an ongoing basis, or if it represents a snapshot of a list of items from another source, or whether it is a prepared list where items may be marked as added, modified or deleted.

                  Shortworking | snapshot | changes
                  Comments

                  This element is labeled as a modifier because a change list must not be misunderstood as a complete list.

                  Control1..1
                  BindingThe codes SHALL be taken from ListMode
                  (required to http://hl7.org/fhir/ValueSet/list-mode|4.0.1)

                  The processing mode that applies to this list.

                  Typecode
                  Is Modifiertrue because If set to "changes", the list is considered incomplete, while the other two codes indicate the list is complete, which changes the understanding of the elements listed
                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                  Summarytrue
                  Requirements

                  Lists are used in various ways, and it must be known in what way it is safe to use them.

                  Pattern Valueworking
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  60. List.title
                  Definition

                  A label for the list assigned by the author.

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

                  Allows customization beyond just the code identifying the kind of list.

                  Example<br/><b>General</b>:Dr. Jane's Patients
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  62. List.code
                  Definition

                  This code defines the purpose of the list - why it was created.

                  ShortWhat the purpose of this list is
                  Comments

                  If there is no code, the purpose of the list is implied where it is used, such as in a document section using Document.section.code.

                  Control1..1
                  BindingThe codes SHALL be taken from MHD List Types ValueSet
                  (required to https://profiles.ihe.net/ITI/MHD/ValueSet/MHDlistTypesVS)
                  TypeCodeableConcept
                  Is Modifierfalse
                  Summarytrue
                  Requirements

                  Lists often contain subsets of resources rather than an exhaustive list. The code identifies what type of subset is included.

                  Pattern Value{
                    "coding" : [{
                      "system" : "https://profiles.ihe.net/ITI/MHD/CodeSystem/MHDlistTypes",
                      "code" : "folder"
                    }]
                  }
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  64. List.subject
                  Definition

                  The common subject (or patient) of the resources that are in the list if there is one.

                  ShortIf all resources have the same subject
                  Comments

                  Some purely arbitrary lists do not have a common subject, so this is optional.

                  Control1..1
                  TypeReference(DDCC Patient)
                  Is Modifierfalse
                  Must Supporttrue
                  Summarytrue
                  Requirements

                  The primary purpose of listing the subject explicitly is to help with finding the right list.

                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  66. List.subject.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
                  68. List.subject.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 List.subject.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                  • value @ url
                  • 70. List.subject.reference
                    Definition

                    A reference to a location at which the other resource is found. The reference may be a relative reference, in which case it is relative to the service base URL, or an absolute URL that resolves to the location where the resource is found. The reference may be version specific or not. If the reference is not to a FHIR RESTful server, then it should be assumed to be version specific. Internal fragment references (start with '#') refer to contained resources.

                    ShortLiteral reference, Relative, internal or absolute URL
                    Comments

                    Using absolute URLs provides a stable scalable approach suitable for a cloud/web context, while using relative/logical references provides a flexible approach suitable for use when trading across closed eco-system boundaries. Absolute URLs do not need to point to a FHIR RESTful server, though this is the preferred approach. If the URL conforms to the structure "/[type]/[id]" then it should be assumed that the reference is to a FHIR RESTful server.

                    Control1..1
                    This element is affected by the following invariants: ref-1
                    Typestring
                    Is Modifierfalse
                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                    Must Supporttrue
                    Summarytrue
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    72. List.subject.type
                    Definition

                    The expected type of the target of the reference. If both Reference.type and Reference.reference are populated and Reference.reference is a FHIR URL, both SHALL be consistent.

                    The type is the Canonical URL of Resource Definition that is the type this reference refers to. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition/ e.g. "Patient" is a reference to http://hl7.org/fhir/StructureDefinition/Patient. Absolute URLs are only allowed for logical models (and can only be used in references in logical models, not resources).

                    ShortType the reference refers to (e.g. "Patient")
                    Comments

                    This element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.

                    Control0..1
                    BindingUnless not suitable, these codes SHALL be taken from ResourceType
                    (extensible to http://hl7.org/fhir/ValueSet/resource-types)

                    Aa resource (or, for logical models, the URI of the logical model).

                    Typeuri
                    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()))
                    74. List.subject.identifier
                    Definition

                    An identifier for the target resource. This is used when there is no way to reference the other resource directly, either because the entity it represents is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference.

                    ShortLogical reference, when literal reference is not known
                    Comments

                    When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy.

                    When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference

                    Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.

                    Reference is intended to point to a structure that can potentially be expressed as a FHIR resource, though there is no need for it to exist as an actual FHIR resource instance - except in as much as an application wishes to actual find the target of the reference. The content referred to be the identifier must meet the logical constraints implied by any limitations on what resource types are permitted for the reference. For example, it would not be legitimate to send the identifier for a drug prescription if the type were Reference(Observation|DiagnosticReport). One of the use-cases for Reference.identifier is the situation where no FHIR representation exists (where the type is Reference (Any).

                    NoteThis is a business identifier, not a resource identifier (see discussion)
                    Control0..1
                    TypeIdentifier
                    Is Modifierfalse
                    Summarytrue
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    76. List.subject.display
                    Definition

                    Plain text narrative that identifies the resource in addition to the resource reference.

                    ShortText alternative for the resource
                    Comments

                    This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.

                    Control0..1
                    Typestring
                    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()))
                    78. List.encounter
                    Definition

                    The encounter that is the context in which this list was created.

                    ShortContext in which list created
                    Control0..0
                    TypeReference(Encounter)
                    Is Modifierfalse
                    Summaryfalse
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    80. List.date
                    Definition

                    The date that the list was prepared.

                    ShortWhen the list was prepared
                    Comments

                    The actual important date is the date of currency of the resources that were summarized, but it is usually assumed that these are current when the preparation occurs.

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

                    Identifies how current the list is which affects relevance.

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    82. List.source
                    Definition

                    The entity responsible for deciding what the contents of the list were. Where the list was created by a human, this is the same as the author of the list.

                    ShortWho and/or what defined the list contents (aka Author)
                    Comments

                    The primary source is the entity that made the decisions what items are in the list. This may be software or user.

                    Control0..0
                    TypeReference(Practitioner, PractitionerRole, Patient, Device)
                    Is Modifierfalse
                    Summarytrue
                    Requirements

                    Allows follow-up as well as context.

                    Alternate NamesAuthor
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    84. List.orderedBy
                    Definition

                    What order applies to the items in the list.

                    ShortWhat order the list has
                    Comments

                    Applications SHOULD render ordered lists in the order provided, but MAY allow users to re-order based on their own preferences as well. If there is no order specified, the order is unknown, though there may still be some order.

                    Control0..0
                    BindingThe codes SHOULD be taken from ListOrderCodes
                    (preferred to http://hl7.org/fhir/ValueSet/list-order)

                    What order applies to the items in a list.

                    TypeCodeableConcept
                    Is Modifierfalse
                    Summaryfalse
                    Requirements

                    Important for presentation and rendering. Lists may be sorted to place more important information first or to group related entries.

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    86. List.note
                    Definition

                    Comments that apply to the overall list.

                    ShortComments about the list
                    Control0..1
                    TypeAnnotation
                    Is Modifierfalse
                    Summaryfalse
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    88. List.entry
                    Definition

                    Entries in this list.

                    ShortEntries in the list
                    Comments

                    If there are no entries in the list, an emptyReason SHOULD be provided.

                    Control0..*
                    This element is affected by the following invariants: lst-1
                    TypeBackboneElement
                    Is Modifierfalse
                    Summaryfalse
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    90. List.entry.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
                    92. List.entry.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())
                    94. List.entry.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())
                    96. List.entry.flag
                    Definition

                    The flag allows the system constructing the list to indicate the role and significance of the item in the list.

                    ShortStatus/Workflow information about this item
                    Comments

                    The flag can only be understood in the context of the List.code. If the flag means that the entry has actually been deleted from the list, the deleted element SHALL be true. Deleted can only be used if the List.mode is "changes".

                    Control0..0
                    BindingFor example codes, see PatientMedicineChangeTypes
                    (example to http://hl7.org/fhir/ValueSet/list-item-flag)

                    Codes that provide further information about the reason and meaning of the item in the list.

                    TypeCodeableConcept
                    Is Modifierfalse
                    Summaryfalse
                    Requirements

                    This field is present to support various clinical uses of lists, such as a discharge summary medication list, where flags specify whether the medication was added, modified, or deleted from the list.

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    98. List.entry.deleted
                    Definition

                    True if this item is marked as deleted in the list.

                    ShortIf this item is actually marked as deleted
                    Comments

                    If the flag means that the entry has actually been deleted from the list, the deleted element SHALL be true. Both flag and deleted can only be used if the List.mode is "changes". A deleted entry should be displayed in narrative as deleted. This element is labeled as a modifier because it indicates that an item is (to be) no longer in the list.

                    Control0..0
                    This element is affected by the following invariants: lst-2
                    Typeboolean
                    Is Modifiertrue because If deleted is true, then the item included in the list isn't actually part of the list anymore
                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                    Summaryfalse
                    Requirements

                    The flag element may contain codes that an application processing the list does not understand. However there can be no ambiguity if a list item is actually marked as "deleted".

                    Meaning if MissingList items are generally only treated as deleted when this element explicitly carries a value of true. Systems SHOULD always populate this value when mode is 'changes'
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    100. List.entry.date
                    Definition

                    When this item was added to the list.

                    ShortWhen item added to list
                    Control0..0
                    TypedateTime
                    Is Modifierfalse
                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                    Summaryfalse
                    Requirements

                    The date may be significant for understanding the meaning of items in a working list.

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    102. List.entry.item
                    Definition

                    A reference to the actual resource from which data was derived.

                    ShortActual entry
                    Control1..1
                    TypeReference(DDCC Document Reference)
                    Is Modifierfalse
                    Summaryfalse
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    104. List.emptyReason
                    Definition

                    If the list is empty, why the list is empty.

                    ShortWhy list is empty
                    Comments

                    The various reasons for an empty list make a significant interpretation to its interpretation. Note that this code is for use when the entire list has been suppressed, and not for when individual items are omitted - implementers may consider using a text note or a flag on an entry in these cases.

                    Control0..0
                    This element is affected by the following invariants: lst-1
                    BindingThe codes SHOULD be taken from ListEmptyReasons
                    (preferred to http://hl7.org/fhir/ValueSet/list-empty-reason)

                    If a list is empty, why it is empty.

                    TypeCodeableConcept
                    Is Modifierfalse
                    Summaryfalse
                    Requirements

                    Allows capturing things like "none exist" or "not asked" which can be important for most lists.

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