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StructureDefinition: PublishableValueSet - XML

Terminology Infrastructure Work Group Maturity Level: 0Trial UseUse Context: Any

PublishableValueSet

<?xml version="1.0" encoding="UTF-8"?>

<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="publishablevalueset"/> 
  <text> 
    <status value="generated"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">to do</div> 
  </text> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-summary">
    <valueMarkdown value="**mustSupport**

When this profile has defined an element as mustSupport, the sender must provide
     the element value when available, and the receiver must accept the element value,
     persist the value and when appropriate, provide function as defined in the profile.
     When mustSupport is defined at a complex element level, all sub-elements inherit
     mustSupport."/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="3"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="vocab"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="trial-use"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/tools/StructureDefinition/profile-summary">
    <valueString value="**mustSupport**

When this profile has defined an element as mustSupport, the sender must provide
     the element value when available, and the receiver must accept the element value,
     persist the value and when appropriate, provide function as defined in the profile.
     When mustSupport is defined at a complex element level, all sub-elements inherit
     mustSupport."/> 
  </extension> 
  <url value="http://hl7.org/fhir/StructureDefinition/publishablevalueset"/> 
  <identifier> 
    <system value="urn:ietf:rfc:3986"/> 
    <value value="urn:oid:2.16.840.1.113883.4.642.5.1201"/> 
  </identifier> 
  <version value="6.0.0-cibuild"/> 
  <name value="PublishableValueSet"/> 
  <title value="Publishable ValueSet"/> 
  <status value="draft"/> 
  <experimental value="false"/> 
  <date value="2020-12-28T16:55:11+11:00"/> 
  <publisher value="HL7 International / Terminology Infrastructure"/> 
  <contact> 
    <telecom> 
      <system value="url"/> 
      <value value="http://www.hl7.org/Special/committees/Vocab"/> 
    </telecom> 
  </contact> 
  <description value="Defines and enforces the minimum expectations for publication and distribution
   of a value set, typically as part of an artifact repository or implementation guide
   publication"/> 
  <fhirVersion value="6.0.0-cibuild"/> 
  <mapping> 
    <identity value="rim"/> 
    <uri value="http://hl7.org/v3"/> 
    <name value="RIM Mapping"/> 
  </mapping> 
  <mapping> 
    <identity value="workflow"/> 
    <uri value="http://hl7.org/fhir/workflow"/> 
    <name value="Workflow Pattern"/> 
  </mapping> 
  <mapping> 
    <identity value="w5"/> 
    <uri value="http://hl7.org/fhir/fivews"/> 
    <name value="FiveWs Pattern Mapping"/> 
  </mapping> 
  <mapping> 
    <identity value="objimpl"/> 
    <uri value="http://hl7.org/fhir/object-implementation"/> 
    <name value="Object Implementation Information"/> 
  </mapping> 
  <kind value="resource"/> 
  <abstract value="false"/> 
  <type value="ValueSet"/> 
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/shareablevalueset"/> 
  <derivation value="constraint"/> 
  <snapshot> 
    <element id="ValueSet">
      <path value="ValueSet"/> 
      <short value="A set of codes drawn from one or more code systems"/> 
      <definition value="A ValueSet resource instance specifies a set of codes drawn from one or more code
       systems, intended for use in a particular context. Value sets link between [CodeSystem](codes
      ystem.html) definitions and their use in [coded elements](terminologies.html)."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <constraint> 
        <key value="cnl-0"/> 
        <severity value="warning"/> 
        <human value="Name should be usable as an identifier for the module by machine processing applications
         such as code generation"/> 
        <expression value="name.exists() implies name.matches('^[A-Z]([A-Za-z0-9_]){1,254}$')"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="conformance.behavior,conformance.terminology"/> 
      </mapping> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.id">
      <path value="ValueSet.id"/> 
      <short value="Logical id of this artifact"/> 
      <definition value="The logical id of the resource, as used in the URL for the resource. Once assigned,
       this value never changes."/> 
      <comment value="Within the context of the FHIR RESTful interactions, the resource has an id except
       for cases like the create and conditional update. Otherwise, the use of the resouce
       id depends on the given use case."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Resource.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="id"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.meta">
      <path value="ValueSet.meta"/> 
      <short value="Metadata about the resource"/> 
      <definition value="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."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Resource.meta"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="Meta"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.implicitRules">
      <path value="ValueSet.implicitRules"/> 
      <short value="A set of rules under which this content was created"/> 
      <definition value="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."/> 
      <comment value="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 its narrative along with other profiles,
       value sets, etc."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Resource.implicitRules"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="true"/> 
      <isModifierReason value="This element is labeled as a modifier because the implicit rules may provide additional
       knowledge about the resource that modifies its meaning or interpretation"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.language">
      <path value="ValueSet.language"/> 
      <short value="Language of the resource content"/> 
      <definition value="The base language in which the resource is written."/> 
      <comment value="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)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Resource.language"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="Language"/> 
        </extension> 
        <strength value="required"/> 
        <description value="IETF language tag for a human language"/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/all-languages|6.0.0-cibuild"/> 
        <additional> 
          <purpose value="starter"/> 
          <valueSet value="http://hl7.org/fhir/ValueSet/languages"/> 
        </additional> 
      </binding> 
    </element> 
    <element id="ValueSet.text">
      <path value="ValueSet.text"/> 
      <short value="Text summary of the resource, for human interpretation"/> 
      <definition value="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
       &quot;clinically safe&quot; for a human to just read the narrative. Resource definitions
       may define what content should be represented in the narrative to ensure clinical
       safety."/> 
      <comment value="Contained resources do not have a 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 &quot;text blob&quot; or where text is additionally entered raw or narrated
       and encoded information is added later."/> 
      <alias value="narrative"/> 
      <alias value="html"/> 
      <alias value="xhtml"/> 
      <alias value="display"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.text"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="Narrative"/> 
      </type> 
      <condition value="dom-6"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="Act.text?"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.contained">
      <path value="ValueSet.contained"/> 
      <short value="Contained, inline Resources"/> 
      <definition value="These resources do not have an independent existence apart from the resource that
       contains them - they cannot be identified independently, nor can they have their
       own independent transaction scope. This is allowed to be a Parameters resource
       if and only if it is referenced by a resource that provides context/meaning."/> 
      <comment value="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."/> 
      <alias value="inline resources"/> 
      <alias value="anonymous resources"/> 
      <alias value="contained resources"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="DomainResource.contained"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Resource"/> 
      </type> 
      <condition value="dom-2"/> 
      <condition value="dom-4"/> 
      <condition value="dom-3"/> 
      <condition value="dom-5"/> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.extension">
      <path value="ValueSet.extension"/> 
      <slicing> 
        <discriminator> 
          <type value="value"/> 
          <path value="url"/> 
        </discriminator> 
        <ordered value="false"/> 
        <rules value="open"/> 
      </slicing> 
      <short value="Extension"/> 
      <definition value="An Extension"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.extension:knowledgeRepresentationLevel">
      <path value="ValueSet.extension"/> 
      <sliceName value="knowledgeRepresentationLevel"/> 
      <short value="narrative | semi-structured | structured | executable"/> 
      <definition value="Defines a knowledge representation level provided by this knowledge artifact."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <constraint> 
        <key value="ext-1"/> 
        <severity value="error"/> 
        <human value="Must have either extensions or value[x], not both"/> 
        <expression value="extension.exists() != value.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
    </element> 
    <element id="ValueSet.extension:authoritativeSource">
      <path value="ValueSet.extension"/> 
      <sliceName value="authoritativeSource"/> 
      <short value="Reference to the current trusted source of the ValueSet resource (metadata and
       definition)"/> 
      <definition value="A reference to the authoritative accessible, persisted source of truth of the entire
       Value Set Definition, including textual information and available versions."/> 
      <comment value="If this extension is not present, then the canonical URL (ValueSet.url) also serves
       the purpose of specifying the authoritative source.  A difference between the canonical
       URL and the authoritiative source might arise in some cases due to ongoing organization
       restructuring, etc., and in those cases this extension may be used.  The URL of
       the authoritative source is intended to be resolvable but that cannot be guaranteed.
       The designated &quot;authoritative source&quot; is normally expected to be able
       to generate a valid expansion of the value set, and if for some reason it cannot
       then the valueset-trusted-expansion should be used."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-authoritativeSource"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <constraint> 
        <key value="ext-1"/> 
        <severity value="error"/> 
        <human value="Must have either extensions or value[x], not both"/> 
        <expression value="extension.exists() != value.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
    </element> 
    <element id="ValueSet.extension:trustedExpansion">
      <path value="ValueSet.extension"/> 
      <sliceName value="trustedExpansion"/> 
      <short value="Reference to a trusted expansion"/> 
      <definition value="Indicates an authoritative source for performing value set expansions."/> 
      <comment value="If the designated &quot;authoritative source&quot; (as specified in the valueset-authoritativ
      eSource extension, if present) is unable to provide a valid expansion, this extension
       indicates an alternate authoritative source where the value set expansion may be
       performed. The alternate authoritative source url must reference a FHIR terminology
       server endpoint (the [base] url of the FHIR server)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-trusted-expansion"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.extension:otherTitle">
      <path value="ValueSet.extension"/> 
      <sliceName value="otherTitle"/> 
      <short value="Alternative titles"/> 
      <definition value="Human readable titles for the valueset."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-otherTitle"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.extension:sourceReference">
      <path value="ValueSet.extension"/> 
      <sliceName value="sourceReference"/> 
      <short value="Where did this content come from"/> 
      <definition value="This text is intended to act as a citation to work done elsewhere that is not part
       of the current stewarding process where the referenced source is in some way a
       basis of the current value set definition."/> 
      <comment value="This is not intended to be a direct link to another value set. It is only intended
       to support a link or textual description that indicates related material for the
       value set."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="DomainResource.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-sourceReference"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.modifierExtension">
      <path value="ValueSet.modifierExtension"/> 
      <short value="Extensions that cannot be ignored"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="DomainResource.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       resource that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.url">
      <path value="ValueSet.url"/> 
      <short value="Canonical identifier for this value set, represented as a URI (globally unique)"/> 
      <definition value="An absolute URI that is used to identify this value set when it is referenced in
       a specification, model, design or an instance; also called its canonical identifier.
       This SHOULD be globally unique and SHOULD be a literal address at which an authoritative
       instance of this value set is (or will be) published. This URL can be the target
       of a canonical reference. It SHALL remain the same when the value set is stored
       on different servers."/> 
      <comment value="Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred.  Multiple
       instances may share the same URL if they have a distinct version.

The determination of when to create a new version of a resource (same url, new
       version) vs. defining a new artifact is up to the author.  Considerations for making
       this decision are found in [Technical and Business Versions](resource.html#versions).
       

In some cases, the resource can no longer be found at the stated url, but the url
       itself cannot change. Implementations can use the [meta.source](resource.html#meta)
       element to indicate where the current master source of the resource can be found."/> 
      <requirements value="Allows the value set to be referenced by a single globally unique identifier."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.url"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <constraint> 
        <key value="cnl-1"/> 
        <severity value="warning"/> 
        <human value="URL should not contain | or # - these characters make processing canonical references
         problematic"/> 
        <expression value="exists() implies matches('^[^|# ]+$')"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.identifier"/> 
      </mapping> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.identifier">
      <path value="ValueSet.identifier"/> 
      <short value="Additional identifier for the value set (business identifier)"/> 
      <definition value="A formal identifier that is used to identify this value set when it is represented
       in other formats, or referenced in a specification, model, design or an instance."/> 
      <comment value="Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier)
       data type, and can then identify this value set outside of FHIR, where it is not
       possible to use the logical URI."/> 
      <requirements value="Allows externally provided and/or usable business identifiers to be easily associated
       with the module."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.identifier"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Identifier"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.identifier"/> 
      </mapping> 
      <mapping> 
        <identity value="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.version">
      <path value="ValueSet.version"/> 
      <short value="Business version of the value set"/> 
      <definition value="The identifier that is used to identify this version of the value set when it is
       referenced in a specification, model, design or instance. This is an arbitrary
       value managed by the value set author and is not expected to be globally unique.
       For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not
       available. There is also no expectation that versions can be placed in a lexicographical
       sequence."/> 
      <comment value="There may be different value set instances that have the same identifier but different
       versions.  The version can be appended to the url in a reference to allow a reference
       to a particular business version of the value set with the format [url]|[version].
       The version SHOULD NOT contain a '#' - see [Business Version](resource.html#bv-format)."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.version"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.version"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.versionAlgorithm[x]">
      <path value="ValueSet.versionAlgorithm[x]"/> 
      <short value="How to compare versions"/> 
      <definition value="Indicates the mechanism used to compare versions to determine which ValueSet is
       more current."/> 
      <comment value="If set as a string, this is a FHIRPath expression that has two additional context
       variables passed in - %version1 and %version2 and will return a negative number
       if version1 is newer, a positive number if version2 and a 0 if the version ordering
       can't be successfully be determined."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.versionAlgorithm[x]"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <type> 
        <code value="Coding"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <binding> 
        <strength value="extensible"/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/version-algorithm"/> 
      </binding> 
    </element> 
    <element id="ValueSet.name">
      <path value="ValueSet.name"/> 
      <short value="Name for this value set (computer friendly)"/> 
      <definition value="A natural language name identifying the value set. This name should be usable as
       an identifier for the module by machine processing applications such as code generation."/> 
      <comment value="The name is not expected to be globally unique. The name should be a simple alphanumeric
       type name to ensure that it is machine-processing friendly.A name should be provided
       unless the value set is a contained resource (e.g. an anonymous value set in a
       profile). Most registries will require a name."/> 
      <requirements value="Support human navigation and code generation."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.name"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <condition value="cnl-0"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.title">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      <path value="ValueSet.title"/> 
      <short value="Name for this value set (human friendly)"/> 
      <definition value="A short, descriptive, user-friendly title for the value set."/> 
      <comment value="This name does not need to be machine-processing friendly and may contain punctuation,
       white-space, etc."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.title"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.status">
      <path value="ValueSet.status"/> 
      <short value="draft | active | retired | unknown"/> 
      <definition value="The status of this value set. Enables tracking the life-cycle of the content. The
       status of the value set applies to the value set definition (ValueSet.compose)
       and the associated ValueSet metadata. Expansions do not have a state."/> 
      <comment value="Allows filtering of value sets that are appropriate for use versus not.See also
       the [http://hl7.org/fhir/StructureDefinition/valueset-workflowStatusDescription](https://buil
      d.fhir.org/ig/HL7/fhir-extensions/StructureDefinition-valueset-workflowStatusDescription.html)
       extension for additional status information related to the editorial process.

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.status"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="true"/> 
      <isModifierReason value="This is labeled as &quot;Is Modifier&quot; because applications should not use
       a retired {{title}} without due consideration"/> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="PublicationStatus"/> 
        </extension> 
        <strength value="required"/> 
        <description value="The lifecycle status of an artifact."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/publication-status|6.0.0-cibuild"/> 
      </binding> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.status"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.experimental">
      <path value="ValueSet.experimental"/> 
      <short value="For testing purposes, not real usage"/> 
      <definition value="A Boolean value to indicate that this value set is authored for testing purposes
       (or education/evaluation/marketing) and is not intended to be used for genuine
       usage."/> 
      <comment value="Allows filtering of value sets that are appropriate for use versus not."/> 
      <requirements value="Enables experimental content to be developed following the same lifecycle that
       would be used for a production-level value set."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.experimental"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="boolean"/> 
      </type> 
      <meaningWhenMissing value="If absent, this resource is treated as though it is not experimental."/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.class"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.date">
      <path value="ValueSet.date"/> 
      <short value="Date last changed"/> 
      <definition value="The date (and optionally time) when the value set metadata or content logical definition
       (.compose) was created or revised."/> 
      <comment value="Note that this is not the same as the meta.lastUpdated which is specific to an
       instance of a value set resource on a server.  Additional specific dates may be
       added as extensions or be found by consulting Provenances associated with past
       versions of the resource.

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <alias value="Revision Date"/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.date"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.recorded"/> 
      </mapping> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.publisher">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      <path value="ValueSet.publisher"/> 
      <short value="Name of the publisher/steward (organization or individual)"/> 
      <definition value="The name of the organization or individual responsible for the release and ongoing
       maintenance of the value set."/> 
      <comment value="Usually an organization but may be an individual. This is not necessarily the same
       individual or organization that developed and initially authored the content. The
       publisher is the primary point of contact for questions or issues with the value
       set. This item SHOULD be populated unless the information is available from context."/> 
      <requirements value="Helps establish the &quot;authority/credibility&quot; of the value set.  May also
       allow for contact."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.publisher"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.witness"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.contact">
      <path value="ValueSet.contact"/> 
      <short value="Contact details for the publisher"/> 
      <definition value="Contact details to assist a user in finding and communicating with the publisher."/> 
      <comment value="May be a web site, an email address, a telephone number, etc.

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.contact"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="ContactDetail"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.description">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      <path value="ValueSet.description"/> 
      <short value="Natural language description of the value set"/> 
      <definition value="A free text natural language description of the value set from a consumer's perspective.
       The textual description specifies the span of meanings for concepts to be included
       within the Value Set Expansion, and also may specify the intended use and limitations
       of the Value Set."/> 
      <comment value="Description SHOULD contain instructions for clinical or administrative use and
       interpretation and information about misuse. Description SHOULD be populated unless
       the information is available from context. Description SHOULD be populated unless
       the value set is a contained resource (e.g. a value set defined solely in the context
       of a profile)."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.description"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="markdown"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.useContext">
      <path value="ValueSet.useContext"/> 
      <short value="The context that the content is intended to support"/> 
      <definition value="The content was developed with a focus and intent of supporting the contexts that
       are listed. These contexts may be general categories (gender, age, ...) or may
       be references to specific programs (insurance plans, studies, ...) and may be used
       to assist with indexing and searching for appropriate value set instances."/> 
      <comment value="When multiple useContexts are specified, there is no expectation that all or any
       of the contexts apply."/> 
      <requirements value="Assist in searching for appropriate content."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.useContext"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="UsageContext"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.jurisdiction">
      <path value="ValueSet.jurisdiction"/> 
      <short value="Intended jurisdiction for value set (if applicable)"/> 
      <definition value="A legal or geographic region in which the value set is intended to be used."/> 
      <comment value="It may be possible for the value set to be used in jurisdictions other than those
       for which it was originally designed or intended.

DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to
       using the new 'jurisdiction' code in the useContext element.  (I.e. useContext.code
       indicating http://terminology.hl7.org/CodeSystem/usage-context-type#jurisdiction
       and useContext.valueCodeableConcept indicating the jurisdiction.)"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.jurisdiction"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="Jurisdiction"/> 
        </extension> 
        <strength value="extensible"/> 
        <description value="Countries and regions within which this artifact is targeted for use."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/jurisdiction"/> 
      </binding> 
    </element> 
    <element id="ValueSet.immutable">
      <path value="ValueSet.immutable"/> 
      <short value="Indicates whether or not any change to the content logical definition may occur"/> 
      <definition value="If this is set to 'true', then no new versions of the content logical definition
       can be created.  Note: Other metadata might still change."/> 
      <comment value="Normally immutability is set to 'false', which is the default assumption if it
       is not populated.  Note that the implication is that if this is set to 'true',
       there may be only one ValueSet version for this definition. Immutability tends
       to be set to 'true' in one of two cases: - Where the value set, by the nature of
       its usage, cannot change.  For example &quot;All specializations of ACT in ActClassCode&quot;
       - Where there's no safe way to express the &quot;Purpose&quot; such that someone
       else could safely make changes to the value set definition. Source workflow control
       must guarantee that the same URI always yields the same definition."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.immutable"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="boolean"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.purpose">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      <path value="ValueSet.purpose"/> 
      <short value="Why this value set is defined"/> 
      <definition value="Explanation of why this value set is needed and why it has been designed as it
       has."/> 
      <comment value="This element does not describe the usage of the value set. Instead, it provides
       traceability of ''why'' the resource is either needed or ''why'' it is defined
       as it is.  This may be used to point to source materials or specifications that
       drove the structure of this value set."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.purpose"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="markdown"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.why[x]"/> 
      </mapping> 
      <mapping> 
        <identity value="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.copyright">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      <path value="ValueSet.copyright"/> 
      <short value="Use and/or publishing restrictions"/> 
      <definition value="A copyright statement relating to the value set and/or its contents. Copyright
       statements are generally legal restrictions on the use and publishing of the value
       set."/> 
      <comment value="Frequently, the copyright differs between the value set and the codes that are
       included. The copyright statement should clearly differentiate between these when
       required."/> 
      <requirements value="Consumers must be able to determine any legal restrictions on the use of the value
       set and/or its content."/> 
      <alias value="License"/> 
      <alias value="Restrictions"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.copyright"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="markdown"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.copyrightLabel">
      <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
        <valueBoolean value="true"/> 
      </extension> 
      <path value="ValueSet.copyrightLabel"/> 
      <short value="Copyright holder and year(s)"/> 
      <definition value="A short string (&lt;50 characters), suitable for inclusion in a page footer that
       identifies the copyright holder, effective period, and optionally whether rights
       are resctricted. (e.g. 'All rights reserved', 'Some rights reserved')."/> 
      <comment value="The (c) symbol should NOT be included in this string. It will be added by software
       when rendering the notation. Full details about licensing, restrictions, warrantees,
       etc. goes in the more general 'copyright' element."/> 
      <requirements value="Defines the content expected to be rendered in all representations of the artifact."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.copyrightLabel"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.approvalDate">
      <path value="ValueSet.approvalDate"/> 
      <short value="When the ValueSet was approved by publisher"/> 
      <definition value="The date on which the resource content was approved by the publisher. Approval
       happens once when the content is officially approved for usage."/> 
      <comment value="The 'date' element may be more recent than the approval date because of minor changes
       or editorial corrections.

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.approvalDate"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="date"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.lastReviewDate">
      <path value="ValueSet.lastReviewDate"/> 
      <short value="When the ValueSet was last reviewed by the publisher"/> 
      <definition value="The date on which the resource content was last reviewed. Review happens periodically
       after approval but does not change the original approval date."/> 
      <comment value="If specified, this date follows the original approval date.

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <requirements value="Gives a sense of how &quot;current&quot; the content is.  Resources that have not
       been reviewed in a long time may have a risk of being less appropriate/relevant."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.lastReviewDate"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="date"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.effectivePeriod">
      <path value="ValueSet.effectivePeriod"/> 
      <short value="When the ValueSet is expected to be used"/> 
      <definition value="The period during which the ValueSet content was or is planned to be in active
       use."/> 
      <comment value="The effective period for a ValueSet determines when the content is applicable for
       usage and is independent of publication and review dates. For example, a valueset
       intended to be used for the year 2016 might be published in 2015.

See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <requirements value="Allows establishing a transition before a resource comes into effect and also allows
       for a sunsetting process when new versions of the ValueSet are or are expected
       to be used instead."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.effectivePeriod"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="Period"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="objimpl"/> 
        <map value="no-gen-base"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.topic">
      <path value="ValueSet.topic"/> 
      <short value="E.g. Education, Treatment, Assessment, etc"/> 
      <definition value="Descriptions related to the content of the ValueSet. Topics provide a high-level
       categorization as well as keywords for the ValueSet that can be useful for filtering
       and searching."/> 
      <comment value="DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to
       using the new 'topic' code in the useContext element.  (I.e. useContext.code indicating
       http://terminology.hl7.org/CodeSystem/usage-context-type#topic and useContext.valueCodeableCo
      ncept indicating the topic)"/> 
      <requirements value="Repositories must be able to determine how to categorize the ValueSet so that it
       can be found by topical and keyword searches."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.topic"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="CodeableConcept"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="DefinitionTopic"/> 
        </extension> 
        <strength value="example"/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/definition-topic"/> 
      </binding> 
    </element> 
    <element id="ValueSet.author">
      <path value="ValueSet.author"/> 
      <short value="Who authored the ValueSet"/> 
      <definition value="An individiual or organization primarily involved in the creation and maintenance
       of the ValueSet."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.author"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="ContactDetail"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.editor">
      <path value="ValueSet.editor"/> 
      <short value="Who edited the ValueSet"/> 
      <definition value="An individual or organization primarily responsible for internal coherence of the
       ValueSet."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.editor"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="ContactDetail"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.reviewer">
      <path value="ValueSet.reviewer"/> 
      <short value="Who reviewed the ValueSet"/> 
      <definition value="An individual or organization asserted by the publisher to be primarily responsible
       for review of some aspect of the ValueSet."/> 
      <comment value="See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.reviewer"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="ContactDetail"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.endorser">
      <path value="ValueSet.endorser"/> 
      <short value="Who endorsed the ValueSet"/> 
      <definition value="An individual or organization asserted by the publisher to be responsible for officially
       endorsing the ValueSet for use in some setting."/> 
      <comment value="See guidance around (not) making local changes to elements [here](canonicalresource.html#loca
      lization)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.endorser"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="ContactDetail"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.relatedArtifact">
      <path value="ValueSet.relatedArtifact"/> 
      <short value="Additional documentation, citations, etc"/> 
      <definition value="Related artifacts such as additional documentation, justification, dependencies,
       bibliographic references, and predecessor and successor artifacts."/> 
      <comment value="Each related artifact is either an attachment, or a reference to another resource,
       but not both."/> 
      <requirements value="A ValueSet must be able to provide enough information for consumers of the content
       (and/or interventions or results produced by the content) to be able to determine
       and understand the justification for and evidence in support of the content."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.relatedArtifact"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="RelatedArtifact"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.compose">
      <path value="ValueSet.compose"/> 
      <short value="Content logical definition of the value set (CLD)"/> 
      <definition value="A set of criteria that define the contents of the value set by including or excluding
       codes selected from the specified code system(s) that the value set draws from.
       This is also known as the Content Logical Definition (CLD)."/> 
      <alias value="Content Logical Definition"/> 
      <alias value="CLD"/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.compose.id">
      <path value="ValueSet.compose.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      <definition value="Unique id for the element within a resource (for internal references). This may
       be any string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="string"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <condition value="ele-1"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.extension">
      <path value="ValueSet.compose.extension"/> 
      <slicing> 
        <discriminator> 
          <type value="value"/> 
          <path value="url"/> 
        </discriminator> 
        <ordered value="false"/> 
        <rules value="open"/> 
      </slicing> 
      <short value="Extension"/> 
      <definition value="An Extension"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.compose.extension:composeCreatedBy">
      <path value="ValueSet.compose.extension"/> 
      <sliceName value="composeCreatedBy"/> 
      <short value="Extension"/> 
      <definition value="User who created the compose for the ValueSet."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-compose-createdBy"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <constraint> 
        <key value="ext-1"/> 
        <severity value="error"/> 
        <human value="Must have either extensions or value[x], not both"/> 
        <expression value="extension.exists() != value.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> 
      </constraint> 
      <isModifier value="false"/> 
    </element> 
    <element id="ValueSet.compose.extension:composeCreationDate">
      <path value="ValueSet.compose.extension"/> 
      <sliceName value="composeCreationDate"/> 
      <short value="Extension"/> 
      <definition value="User who created the compose for the ValueSet."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
        <profile value="http://hl7.org/fhir/StructureDefinition/valueset-compose-createdBy"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <constraint> 
        <key value="ext-1"/> 
        <severity value="error"/> 
        <human value="Must have either extensions or value[x], not both"/> 
        <expression value="extension.exists() != value.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> 
      </constraint> 
      <isModifier value="false"/> 
    </element> 
    <element id="ValueSet.compose.modifierExtension">
      <path value="ValueSet.compose.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <alias value="modifiers"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="BackboneElement.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       element that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.lockedDate">
      <path value="ValueSet.compose.lockedDate"/> 
      <short value="Fixed date for references with no specified version (transitive)"/> 
      <definition value="The Locked Date is  the effective date that is used to determine the version of
       all referenced Code Systems and Value Set Definitions included in the compose that
       are not already tied to a specific version."/> 
      <comment value="With a defined lockedDate the value set is considered &quot;Locked&quot;. Otherwise,
       the value set may have different expansions as underlying code systems and/or value
       sets evolve.  The interpretation of lockedDate is often dependent on the context
       - e.g. a SNOMED CT derived value set with a lockedDate will have a different expansion
       in USA than in UK.  If a value set specifies a version for include and exclude
       statements, and also specifies a locked date, the specified versions need to be
       available that date, or the value set will not be usable."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.lockedDate"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="date"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="w5"/> 
        <map value="FiveWs.init"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.inactive">
      <path value="ValueSet.compose.inactive"/> 
      <short value="Whether inactive codes are in the value set"/> 
      <definition value="Whether inactive codes - codes that are not approved for current use - are in the
       value set. If inactive = true, inactive codes are to be included in the expansion,
       if inactive = false, the inactive codes will not be included in the expansion.
       If absent, the behavior is determined by the implementation, or by the applicable
       $expand parameters (but generally, inactive codes would be expected to be included)."/> 
      <comment value="Note that in the FHIR terminology framework, &quot;deprecated&quot; does not mean
       inactive, but in some code systems, e.g. LOINC, &quot;deprecated&quot; does mean
       inactive. Code systems should define what codes are considered to be inactive.
       If this is not clearly defined (including in the FHIR code system resource), then
       all codes are assumed to be active.

The Value Set Definition specification defines an ActiveOnly element, which is
       the reverse of this element e.g. (ValueSet.compose.inactive=FALSE) is the same
       as (VSD.ActiveOnly=TRUE)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.inactive"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="boolean"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
    </element> 
    <element id="ValueSet.compose.include">
      <path value="ValueSet.compose.include"/> 
      <short value="Include one or more codes from a code system or other value set(s)"/> 
      <definition value="Include one or more codes from a code system or other value set(s)."/> 
      <comment value="All the conditions in an include must be true. If a system is listed, all the codes
       from the system are listed. If one or more filters are listed, all of the filters
       must apply. If one or more value sets are listed, the codes must be in all the
       value sets. E.g. each include is 'include all the codes that meet all these conditions'."/> 
      <min value="1"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include"/> 
        <min value="1"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-1"/> 
        <severity value="error"/> 
        <human value="A value set include/exclude SHALL have a value set or a system"/> 
        <expression value="valueSet.exists() or system.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-2"/> 
        <severity value="error"/> 
        <human value="A value set with concepts or filters SHALL include a system"/> 
        <expression value="(concept.exists() or filter.exists()) implies system.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-3"/> 
        <severity value="error"/> 
        <human value="Cannot have both concept and filter"/> 
        <expression value="concept.empty() or filter.empty()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.id">
      <path value="ValueSet.compose.include.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      <definition value="Unique id for the element within a resource (for internal references). This may
       be any string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="string"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <condition value="ele-1"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.extension">
      <path value="ValueSet.compose.include.extension"/> 
      <short value="Additional content defined by implementations"/> 
      <definition value="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 managable, 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."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.modifierExtension">
      <path value="ValueSet.compose.include.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <alias value="modifiers"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="BackboneElement.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       element that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.system">
      <path value="ValueSet.compose.include.system"/> 
      <short value="The system the codes come from"/> 
      <definition value="An absolute URI which is the code system from which the selected codes come from."/> 
      <comment value="If there are no codes or filters, the entire code system is included. Note that
       the set of codes that are included may contain abstract codes. See ''Coding.system''
       for further documentation about the correct value for the system element."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.system"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <condition value="vsd-2"/> 
      <condition value="vsd-1"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.version">
      <path value="ValueSet.compose.include.version"/> 
      <short value="Specific version of the code system referred to"/> 
      <definition value="The version of the code system that the codes are selected from, or the special
       version '*' for all versions."/> 
      <comment value="This is used when selecting the descendants of a concept - they may change between
       versions. If no version is specified, then the exact contents of the value set
       might not be known until a context of use binds it to a particular version. The
       special value '*' means all versions; It is at server discretion regarding expansions
       and which versions must be supported."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.version"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept">
      <path value="ValueSet.compose.include.concept"/> 
      <short value="A concept defined in the system"/> 
      <definition value="Specifies a concept to be included or excluded."/> 
      <comment value="The list of concepts is considered ordered, though the order might not have any
       particular significance. Typically, the order of an expansion follows that defined
       in the compose element."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.concept"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <condition value="vsd-2"/> 
      <condition value="vsd-3"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.id">
      <path value="ValueSet.compose.include.concept.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      <definition value="Unique id for the element within a resource (for internal references). This may
       be any string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="string"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <condition value="ele-1"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.extension">
      <path value="ValueSet.compose.include.concept.extension"/> 
      <short value="Additional content defined by implementations"/> 
      <definition value="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 managable, 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."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.modifierExtension">
      <path value="ValueSet.compose.include.concept.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <alias value="modifiers"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="BackboneElement.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       element that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.code">
      <path value="ValueSet.compose.include.concept.code"/> 
      <short value="Code or expression from system"/> 
      <definition value="Specifies a code for the concept to be included or excluded."/> 
      <comment value="Expressions are allowed if defined by the underlying code system."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.code"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.display">
      <path value="ValueSet.compose.include.concept.display"/> 
      <short value="Text to display for this code for this value set in this valueset"/> 
      <definition value="The text to display to the user for this concept in the context of this valueset.
       If no display is provided, then applications using the value set use the display
       specified for the code by the system."/> 
      <comment value="The value set resource allows for an alternative display to be specified for when
       this concept is used in this particular value set. See notes in the value set narrative
       about the correct use of this element."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.display"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation">
      <path value="ValueSet.compose.include.concept.designation"/> 
      <short value="Additional representations for this concept"/> 
      <definition value="Additional representations for this concept when used in this value set - other
       languages, aliases, specialized purposes, used for particular purposes, etc."/> 
      <comment value="Concepts have both a ```display``` and an array of ```designation```. The display
       is equivalent to a special designation with an implied ```designation.use``` of
       &quot;primary code&quot; and a language equal to the [Resource Language](resource.html#langua
      ge)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <constraint> 
        <key value="vsd-11"/> 
        <severity value="error"/> 
        <human value="Must have a value for concept.designation.use if concept.designation.additionalUse
         is present"/> 
        <expression value="additionalUse.exists() implies use.exists()"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.id">
      <path value="ValueSet.compose.include.concept.designation.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      <definition value="Unique id for the element within a resource (for internal references). This may
       be any string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="string"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <condition value="ele-1"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.extension">
      <path value="ValueSet.compose.include.concept.designation.extension"/> 
      <short value="Additional content defined by implementations"/> 
      <definition value="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 managable, 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."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.modifierExtension">
      <path value="ValueSet.compose.include.concept.designation.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <alias value="modifiers"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="BackboneElement.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       element that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.language">
      <path value="ValueSet.compose.include.concept.designation.language"/> 
      <short value="Human language of the designation"/> 
      <definition value="The language this designation is defined for."/> 
      <comment value="In the absence of a language, the resource language applies."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.language"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="Language"/> 
        </extension> 
        <strength value="required"/> 
        <description value="IETF language tag for a human language"/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/all-languages|6.0.0-cibuild"/> 
        <additional> 
          <purpose value="starter"/> 
          <valueSet value="http://hl7.org/fhir/ValueSet/languages"/> 
        </additional> 
      </binding> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.use">
      <path value="ValueSet.compose.include.concept.designation.use"/> 
      <short value="Types of uses of designations"/> 
      <definition value="A code that represents types of uses of designations."/> 
      <comment value="If no use is provided, the designation can be assumed to be suitable for general
       display to a human user."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.use"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="Coding"/> 
      </type> 
      <condition value="vsd-11"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="ConceptDesignationUse"/> 
        </extension> 
        <strength value="extensible"/> 
        <description value="Details of how a designation would be used."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/designation-use"/> 
      </binding> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.additionalUse">
      <path value="ValueSet.compose.include.concept.designation.additionalUse"/> 
      <short value="Additional ways how this designation would be used"/> 
      <definition value="Additional codes that detail how this designation would be used, if there is more
       than one use."/> 
      <comment value="This was added rather than increasing the cardinality of .use to 0..* in order
       to maintain backward compatibility."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.additionalUse"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Coding"/> 
      </type> 
      <condition value="vsd-11"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="ConceptDesignationUse"/> 
        </extension> 
        <strength value="extensible"/> 
        <description value="Details of how a designation would be used."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/designation-use"/> 
      </binding> 
    </element> 
    <element id="ValueSet.compose.include.concept.designation.value">
      <path value="ValueSet.compose.include.concept.designation.value"/> 
      <short value="The text value for this designation"/> 
      <definition value="The text value for this designation."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.concept.designation.value"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.compose.include.filter">
      <path value="ValueSet.compose.include.filter"/> 
      <short value="Select codes/concepts by their properties (including relationships)"/> 
      <definition value="Select concepts by specifying a matching criterion based on the properties (including
       relationships) defined by the system, or on filters defined by the system. If multiple
       filters are specified within the include, they SHALL all be true."/> 
      <comment value="Selecting codes by specifying filters based on properties is only possible where
       the underlying code system defines appropriate properties. Note that in some cases,
       the underlying code system defines the logical concepts but not the literal codes
       for the concepts. In such cases, the literal definitions may be provided by a third
       party."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.filter"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <condition value="vsd-2"/> 
      <condition value="vsd-3"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.id">
      <path value="ValueSet.compose.include.filter.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      <definition value="Unique id for the element within a resource (for internal references). This may
       be any string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="string"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <condition value="ele-1"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.extension">
      <path value="ValueSet.compose.include.filter.extension"/> 
      <short value="Additional content defined by implementations"/> 
      <definition value="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 managable, 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."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.modifierExtension">
      <path value="ValueSet.compose.include.filter.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <alias value="modifiers"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="BackboneElement.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       element that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.property">
      <path value="ValueSet.compose.include.filter.property"/> 
      <short value="A property/filter defined by the code system"/> 
      <definition value="A code that identifies a property or a filter defined in the code system."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.filter.property"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.op">
      <path value="ValueSet.compose.include.filter.op"/> 
      <short value="= | is-a | descendent-of | is-not-a | regex | in | not-in | generalizes | child-of
       | descendent-leaf | exists"/> 
      <definition value="The kind of operation to perform as a part of the filter criteria."/> 
      <comment value="In case filter.property represents a property of the system, the operation applies
       to the selected property. In case filter.property represents a filter of the system,
       the operation SHALL match one of the CodeSystem.filter.operator values."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.filter.op"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="code"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <binding> 
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="FilterOperator"/> 
        </extension> 
        <strength value="required"/> 
        <description value="The kind of operation to perform as a part of a property based filter."/> 
        <valueSet value="http://hl7.org/fhir/ValueSet/filter-operator|6.0.0-cibuild"/> 
      </binding> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.filter.value">
      <path value="ValueSet.compose.include.filter.value"/> 
      <short value="Code from the system, or regex criteria, or boolean value for exists"/> 
      <definition value="The match value may be either a code defined by the system, or a string value,
       which is a regex match on the literal string of the property value  (if the filter
       represents a property defined in CodeSystem) or of the system filter value (if
       the filter represents a filter defined in CodeSystem) when the operation is 'regex',
       or one of the values (true and false), when the operation is 'exists'."/> 
      <comment value="Use regex matching with care - full regex matching on every SNOMED CT term is prohibitive,
       for example."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.filter.value"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.valueSet">
      <path value="ValueSet.compose.include.valueSet"/> 
      <short value="Select the contents included in this value set"/> 
      <definition value="Selects the concepts found in this value set (based on its value set definition).
       This is an absolute URI that is a reference to ValueSet.url.  If multiple value
       sets are specified this includes the intersection of the contents of all of the
       referenced value sets."/> 
      <comment value="The value set URI is either a logical reference to a defined value set such as
       a [SNOMED CT reference set](https://terminology.hl7.org/SNOMEDCT.html), or a direct
       reference to a value set definition using ValueSet.url. The reference might not
       refer to an actual FHIR ValueSet resource; in this case, whatever is referred to
       is an implicit definition of a value set that needs to be clear about how versions
       are resolved."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.include.valueSet"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="canonical"/> 
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/ValueSet"/> 
      </type> 
      <condition value="vsd-1"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.include.copyright">
      <path value="ValueSet.compose.include.copyright"/> 
      <short value="A copyright statement for the specific code system included in the value set"/> 
      <definition value="A copyright statement for the specific code system asserted by the containing ValueSet.compos
      e.include element's system value (if the associated ValueSet.compose.include.version
       element is not present); or the code system and version combination (if the associated
       ValueSet.compose.include.version element is present)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.compose.include.copyright"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="true"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.exclude">
      <path value="ValueSet.compose.exclude"/> 
      <short value="Explicitly exclude codes from a code system or other value sets"/> 
      <definition value="Exclude one or more codes from the value set based on code system filters and/or
       other value sets."/> 
      <comment value="Usually this is used to selectively exclude codes that were included by subsumption
       in the inclusions. Any display names specified for the codes are ignored."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.exclude"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <contentReference value="http://hl7.org/fhir/StructureDefinition/ValueSet#ValueSet.compose.include"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.compose.property">
      <path value="ValueSet.compose.property"/> 
      <short value="Property to return if client doesn't override"/> 
      <definition value="A property to return in the expansion, if the client doesn't ask for any particular
       properties. May be either a code from the code system definition (convenient) or
       a the formal URI that refers to the property. The special value '*' means all properties
       known to the server."/> 
      <comment value="Note that property names can clash, so using a URI is recommended."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.compose.property"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion">
      <path value="ValueSet.expansion"/> 
      <short value="Used when the value set is &quot;expanded&quot;"/> 
      <definition value="A value set can also be &quot;expanded&quot;, where the value set is turned into
       a simple collection of enumerated codes. This element holds the expansion, if it
       has been performed."/> 
      <comment value="Expansion is performed to produce a collection of codes that are ready to use for
       data entry or validation. Value set expansions are always considered to be stateless
       - they are a record of the set of codes in the value set at a point in time under
       a given set of conditions, and are not subject to ongoing maintenance.

Expansion.parameter is  a simplified list of parameters - a subset of the features
       of the [Parameters](parameters.html) resource."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.id">
      <path value="ValueSet.expansion.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      <definition value="Unique id for the element within a resource (for internal references). This may
       be any string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="string"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <condition value="ele-1"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.extension">
      <path value="ValueSet.expansion.extension"/> 
      <short value="Additional content defined by implementations"/> 
      <definition value="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 managable, 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."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.modifierExtension">
      <path value="ValueSet.expansion.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <alias value="modifiers"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="BackboneElement.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       element that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.identifier">
      <path value="ValueSet.expansion.identifier"/> 
      <short value="Identifies the value set expansion (business identifier)"/> 
      <definition value="An identifier that uniquely identifies this expansion of the valueset, based on
       a unique combination of the provided parameters, the system default parameters,
       and the underlying system code system versions etc. Systems may re-use the same
       identifier as long as those factors remain the same, and the expansion is the same,
       but are not required to do so. This is a business identifier."/> 
      <comment value="Typically, this uri is a UUID (e.g. urn:uuid:8230ff20-c97a-4167-a59d-dc2cb9df16dd)."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.identifier"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.next">
      <path value="ValueSet.expansion.next"/> 
      <short value="Opaque urls for paging through expansion results"/> 
      <definition value="As per paging Search results, the next URLs are opaque to the client, have no dictated
       structure, and only the server understands them."/> 
      <comment value="Clients SHOULD use the next link, if present, to page through expansion results
       in preference to using the offset and count parameters. Due to the optional nature
       of the next link, its absence does not necessarily indicate that it is the last
       page of results. Instead, as the offset and count parameters SHALL be populated
       when paging, clients can reliably use the count/offset parameters to determine
       whether the whole expansion is returned."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.next"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="uri"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.timestamp">
      <path value="ValueSet.expansion.timestamp"/> 
      <short value="Time ValueSet expansion happened"/> 
      <definition value="The time at which the expansion was produced by the expanding system."/> 
      <comment value="This SHOULD be a fully populated instant, but in some circumstances, value sets
       are expanded by hand, and the expansion is published without that precision."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.timestamp"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.total">
      <path value="ValueSet.expansion.total"/> 
      <short value="Total number of codes in the expansion"/> 
      <definition value="The total number of concepts in the expansion. If the number of concept nodes in
       this resource is less than the stated number, then the server can return more using
       the offset parameter."/> 
      <comment value="Paging only applies to flat expansions."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.total"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="integer"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.offset">
      <path value="ValueSet.expansion.offset"/> 
      <short value="Offset at which this resource starts"/> 
      <definition value="If paging is being used, the offset at which this resource starts.  I.e. this resource
       is a partial view into the expansion. If paging is not being used, this element
       SHALL NOT be present."/> 
      <comment value="Paging only applies to flat expansions. If a filter is applied, the count is the
       number of concepts that matched the filter, not the number of concepts in an unfiltered
       view of the expansion."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.offset"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="integer"/> 
      </type> 
      <meaningWhenMissing value="Paging is not being used"/> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.parameter">
      <path value="ValueSet.expansion.parameter"/> 
      <short value="Parameter that controlled the expansion process"/> 
      <definition value="A parameter that controlled the expansion process. These parameters may be used
       by users of expanded value sets to check whether the expansion is suitable for
       a particular purpose, or to pick the correct expansion."/> 
      <comment value="The server decides which parameters to include here, but at a minimum, the list
       SHOULD include all of the parameters that affect the $expand operation. If the
       expansion will be persisted all of these parameters SHALL be included. If the codeSystem
       on the server has a specified version then this version SHALL be provided as a
       parameter in the expansion (note that not all code systems have a version)."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.parameter"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.parameter.id">
      <path value="ValueSet.expansion.parameter.id"/> 
      <representation value="xmlAttr"/> 
      <short value="Unique id for inter-element referencing"/> 
      <definition value="Unique id for the element within a resource (for internal references). This may
       be any string value that does not contain spaces."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="Element.id"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="string"/> 
        </extension> 
        <code value="http://hl7.org/fhirpath/System.String"/> 
      </type> 
      <condition value="ele-1"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.parameter.extension">
      <path value="ValueSet.expansion.parameter.extension"/> 
      <short value="Additional content defined by implementations"/> 
      <definition value="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 managable, 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."/> 
      <comment value="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."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="Element.extension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="n/a"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.parameter.modifierExtension">
      <path value="ValueSet.expansion.parameter.modifierExtension"/> 
      <short value="Extensions that cannot be ignored even if unrecognized"/> 
      <definition value="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 managable, 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)."/> 
      <comment value="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."/> 
      <requirements value="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](extensibility.html#modifierExtension)."/> 
      <alias value="extensions"/> 
      <alias value="user content"/> 
      <alias value="modifiers"/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="BackboneElement.modifierExtension"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="Extension"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <isModifier value="true"/> 
      <isModifierReason value="Modifier extensions are expected to modify the meaning or interpretation of the
       element that contains them"/> 
      <isSummary value="true"/> 
      <mapping> 
        <identity value="rim"/> 
        <map value="N/A"/> 
      </mapping> 
    </element> 
    <element id="ValueSet.expansion.parameter.name">
      <path value="ValueSet.expansion.parameter.name"/> 
      <short value="Name as assigned by the client or server"/> 
      <definition value="Name of the input parameter to the $expand operation; may be a server-assigned
       name for additional default or other server-supplied parameters used to control
       the expansion process."/> 
      <comment value="The names are assigned at the discretion of the server."/> 
      <min value="1"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.parameter.name"/> 
        <min value="1"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.parameter.value[x]">
      <path value="ValueSet.expansion.parameter.value[x]"/> 
      <short value="Value of the named parameter"/> 
      <definition value="The value of the parameter."/> 
      <min value="0"/> 
      <max value="1"/> 
      <base> 
        <path value="ValueSet.expansion.parameter.value[x]"/> 
        <min value="0"/> 
        <max value="1"/> 
      </base> 
      <type> 
        <code value="string"/> 
      </type> 
      <type> 
        <code value="boolean"/> 
      </type> 
      <type> 
        <code value="integer"/> 
      </type> 
      <type> 
        <code value="decimal"/> 
      </type> 
      <type> 
        <code value="uri"/> 
      </type> 
      <type> 
        <code value="code"/> 
      </type> 
      <type> 
        <code value="dateTime"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.property">
      <path value="ValueSet.expansion.property"/> 
      <short value="Additional information supplied about each concept"/> 
      <definition value="A property defines an additional slot through which additional information can
       be provided about a concept."/> 
      <min value="0"/> 
      <max value="*"/> 
      <base> 
        <path value="ValueSet.expansion.property"/> 
        <min value="0"/> 
        <max value="*"/> 
      </base> 
      <type> 
        <code value="BackboneElement"/> 
      </type> 
      <constraint> 
        <key value="ele-1"/> 
        <severity value="error"/> 
        <human value="All FHIR elements must have a @value or children"/> 
        <expression value="hasValue() or (children().count() &gt; id.count())"/> 
        <source value="http://hl7.org/fhir/StructureDefinition/Element"/> 
      </constraint> 
      <mustSupport value="false"/> 
      <isModifier value="false"/> 
      <isSummary value="false"/> 
    </element> 
    <element id="ValueSet.expansion.property.id">
      <path value="ValueSet.expansion.property.id"/> 
      <representation<