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1.1.0 - STU1

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## Resource Profile: PSSResponseBundle - XML Profile

Active as of 2026-02-27

XML representation of the PSSResponseBundle resource profile.

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    <StructureDefinition xmlns="http://hl7.org/fhir">
      <id value="PSSResponseBundle"/>
      <text>
        <status value="extensions"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition PSSResponseBundle</b></p><a name="PSSResponseBundle"> </a><a name="hcPSSResponseBundle"> </a><table border="0" cellpadding="0" cellspacing="0" style="border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;"><tr style="border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top"><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the element can appear in the instance">Card.</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px; width: 100px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description &amp; Constraints</a><span style="float: right"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64, " alt="doco" style="background-color: inherit"/></a></span></th></tr><tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_resource.png" alt="." style="background-color: white; background-color: inherit" title="Resource" class="hierarchy"/> <a href="StructureDefinition-PSSResponseBundle-definitions.html#Bundle">Bundle</a><a name="Bundle"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/bundle.html">Bundle</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Contains a collection of resources</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-PSSResponseBundle-definitions.html#Bundle.identifier">identifier</a><a name="Bundle.identifier"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">1..<span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#Identifier">Identifier</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Persistent identifier for the bundle</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck00.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-PSSResponseBundle-definitions.html#Bundle.timestamp">timestamp</a><a name="Bundle.timestamp"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">1..<span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#instant">instant</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">When the bundle was assembled</span></td></tr>
    <tr><td colspan="5" class="hierarchy"><br/><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64, " alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
      </text>
      <url
           value="https://www.ehealth.fgov.be/standards/fhir/pss/StructureDefinition/PSSResponseBundle"/>
      <identifier>
        <system value="urn:ietf:rfc:3986"/>
        <value value="urn:oid:2.16.840.1.113883.2.51.22.2.42.11"/>
      </identifier>
      <version value="1.1.0"/>
      <name value="PSSResponseBundle"/>
      <title value="PSS Response Bundle"/>
      <status value="active"/>
      <date value="2026-02-27T16:08:13+01:00"/>
      <publisher value="eHealth Platform"/>
      <contact>
        <name value="eHealth Platform"/>
        <telecom>
          <system value="url"/>
          <value value="https://www.ehealth.fgov.be/standards/fhir/"/>
        </telecom>
        <telecom>
          <system value="email"/>
          <value value="support@be-ehealth-standards.atlassian.net"/>
        </telecom>
      </contact>
      <contact>
        <name value="Message Structure eHealth"/>
        <telecom>
          <system value="email"/>
          <value value="support@be-ehealth-standards.atlassian.net"/>
          <use value="work"/>
        </telecom>
      </contact>
      <description
                   value="The PSS Response Bundle is used to return data from the PSS system."/>
      <jurisdiction>
        <coding>
          <system value="urn:iso:std:iso:3166"/>
          <code value="BE"/>
          <display value="Belgium"/>
        </coding>
      </jurisdiction>
      <fhirVersion value="4.0.1"/>
      <mapping>
        <identity value="v2"/>
        <uri value="http://hl7.org/v2"/>
        <name value="HL7 v2 Mapping"/>
      </mapping>
      <mapping>
        <identity value="rim"/>
        <uri value="http://hl7.org/v3"/>
        <name value="RIM Mapping"/>
      </mapping>
      <mapping>
        <identity value="cda"/>
        <uri value="http://hl7.org/v3/cda"/>
        <name value="CDA (R2)"/>
      </mapping>
      <mapping>
        <identity value="w5"/>
        <uri value="http://hl7.org/fhir/fivews"/>
        <name value="FiveWs Pattern Mapping"/>
      </mapping>
      <kind value="resource"/>
      <abstract value="false"/>
      <type value="Bundle"/>
      <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
      <derivation value="constraint"/>
      <snapshot>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
          <valueString value="4.0.1"/>
        </extension>
        <element id="Bundle">
          <path value="Bundle"/>
          <short value="Contains a collection of resources"/>
          <definition value="A container for a collection of resources."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Bundle"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <constraint>
            <key value="bdl-1"/>
            <severity value="error"/>
            <human value="total only when a search or history"/>
            <expression
                        value="total.empty() or (type = 'searchset') or (type = 'history')"/>
            <xpath
                   value="not(f:total) or (f:type/@value = 'searchset') or (f:type/@value = 'history')"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-2"/>
            <severity value="error"/>
            <human value="entry.search only when a search"/>
            <expression value="entry.search.empty() or (type = 'searchset')"/>
            <xpath
                   value="not(f:entry/f:search) or (f:type/@value = 'searchset')"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-3"/>
            <severity value="error"/>
            <human
                   value="entry.request mandatory for batch/transaction/history, otherwise prohibited"/>
            <expression
                        value="entry.all(request.exists() = (%resource.type = 'batch' or %resource.type = 'transaction' or %resource.type = 'history'))"/>
            <xpath
                   value="not(f:entry/f:request) or (f:type/@value = 'batch') or (f:type/@value = 'transaction') or (f:type/@value = 'history')"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-4"/>
            <severity value="error"/>
            <human
                   value="entry.response mandatory for batch-response/transaction-response/history, otherwise prohibited"/>
            <expression
                        value="entry.all(response.exists() = (%resource.type = 'batch-response' or %resource.type = 'transaction-response' or %resource.type = 'history'))"/>
            <xpath
                   value="not(f:entry/f:response) or (f:type/@value = 'batch-response') or (f:type/@value = 'transaction-response') or (f:type/@value = 'history')"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-7"/>
            <severity value="error"/>
            <human
                   value="FullUrl must be unique in a bundle, or else entries with the same fullUrl must have different meta.versionId (except in history bundles)"/>
            <expression
                        value="(type = 'history') or entry.where(fullUrl.exists()).select(fullUrl&amp;resource.meta.versionId).isDistinct()"/>
            <xpath
                   value="(f:type/@value = 'history') or (count(for $entry in f:entry[f:resource] return $entry[count(parent::f:Bundle/f:entry[f:fullUrl/@value=$entry/f:fullUrl/@value and ((not(f:resource/*/f:meta/f:versionId/@value) and not($entry/f:resource/*/f:meta/f:versionId/@value)) or f:resource/*/f:meta/f:versionId/@value=$entry/f:resource/*/f:meta/f:versionId/@value)])!=1])=0)"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-9"/>
            <severity value="error"/>
            <human
                   value="A document must have an identifier with a system and a value"/>
            <expression
                        value="type = 'document' implies (identifier.system.exists() and identifier.value.exists())"/>
            <xpath
                   value="not(f:type/@value = 'document') or exists(f:identifier/f:system) or exists(f:identifier/f:value)"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-10"/>
            <severity value="error"/>
            <human value="A document must have a date"/>
            <expression value="type = 'document' implies (timestamp.hasValue())"/>
            <xpath
                   value="not(f:type/@value = 'document') or exists(f:timestamp/@value)"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-11"/>
            <severity value="error"/>
            <human
                   value="A document must have a Composition as the first resource"/>
            <expression
                        value="type = 'document' implies entry.first().resource.is(Composition)"/>
            <xpath
                   value="not(f:type/@value='document') or f:entry[1]/f:resource/f:Composition"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-12"/>
            <severity value="error"/>
            <human
                   value="A message must have a MessageHeader as the first resource"/>
            <expression
                        value="type = 'message' implies entry.first().resource.is(MessageHeader)"/>
            <xpath
                   value="not(f:type/@value='message') or f:entry[1]/f:resource/f:MessageHeader"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="Entity. Role, or Act"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="cda"/>
            <map value="ClinicalDocument, if bundle.type = document"/>
          </mapping>
        </element>
        <element id="Bundle.id">
          <path value="Bundle.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="The only time that a resource does not have an id is when it is being submitted to the server using a create operation."/>
          <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>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.meta">
          <path value="Bundle.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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.implicitRules">
          <path value="Bundle.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 it's 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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <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 it's meaning or interpretation"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.language">
          <path value="Bundle.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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
              <valueCanonical value="http://hl7.org/fhir/ValueSet/all-languages"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="Language"/>
            </extension>
            <strength value="preferred"/>
            <description value="A human language."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/languages|4.0.1"/>
          </binding>
        </element>
        <element id="Bundle.identifier">
          <path value="Bundle.identifier"/>
          <short value="Persistent identifier for the bundle"/>
          <definition
                      value="A persistent identifier for the bundle that won't change as a bundle is copied from server to server."/>
          <comment
                   value="Persistent identity generally only matters for batches of type Document, Message, and Collection. It would not normally be populated for search and history results and servers ignore Bundle.identifier when processing batches and transactions. For Documents  the .identifier SHALL be populated such that the .identifier is globally unique."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.identifier"/>
            <min value="0"/>
            <max value="1"/>
          </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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.identifier"/>
          </mapping>
          <mapping>
            <identity value="cda"/>
            <map value="ClinicalDocument.id"/>
          </mapping>
        </element>
        <element id="Bundle.type">
          <path value="Bundle.type"/>
          <short
                 value="document | message | transaction | transaction-response | batch | batch-response | history | searchset | collection"/>
          <definition
                      value="Indicates the purpose of this bundle - how it is intended to be used."/>
          <comment
                   value="It's possible to use a bundle for other purposes (e.g. a document can be accepted as a transaction). This is primarily defined so that there can be specific rules for some of the bundle types."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.type"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="BundleType"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Indicates the purpose of a bundle - how it is intended to be used."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/bundle-type|4.0.1"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.class"/>
          </mapping>
        </element>
        <element id="Bundle.timestamp">
          <path value="Bundle.timestamp"/>
          <short value="When the bundle was assembled"/>
          <definition
                      value="The date/time that the bundle was assembled - i.e. when the resources were placed in the bundle."/>
          <comment
                   value="For many bundles, the timestamp is equal to .meta.lastUpdated, because they are not stored (e.g. search results). When a bundle is placed in a persistent store, .meta.lastUpdated will be usually be changed by the server. When the bundle is a message, a middleware agent altering the message (even if not stored) SHOULD update .meta.lastUpdated. .timestamp is used to track the original time of the Bundle, and SHOULD be populated.

    Usage:

    * document : the date the document was created. Note: the composition may predate the document, or be associated with multiple documents. The date of the composition - the authoring time - may be earlier than the document assembly time
    * message : the date that the content of the message was assembled. This date is not changed by middleware engines unless they add additional data that changes the meaning of the time of the message
    * history : the date that the history was assembled. This time would be used as the _since time to ask for subsequent updates
    * searchset : the time that the search set was assembled. Note that different pages MAY have different timestamps but need not. Having different timestamps does not imply that subsequent pages will represent or include changes made since the initial query
    * transaction | transaction-response | batch | batch-response | collection : no particular assigned meaning

    The timestamp value should be greater than the lastUpdated and other timestamps in the resources in the bundle, and it should be equal or earlier than the .meta.lastUpdated on the Bundle itself."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.timestamp"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="instant"/>
          </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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.init"/>
          </mapping>
          <mapping>
            <identity value="cda"/>
            <map value="ClinicalDocument.effectiveTime"/>
          </mapping>
        </element>
        <element id="Bundle.total">
          <path value="Bundle.total"/>
          <short value="If search, the total number of matches"/>
          <definition
                      value="If a set of search matches, this is the total number of entries of type 'match' across all pages in the search.  It does not include search.mode = 'include' or 'outcome' entries and it does not provide a count of the number of entries in the Bundle."/>
          <comment
                   value="Only used if the bundle is a search result set. The total does not include resources such as OperationOutcome and included resources, only the total number of matching resources."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.total"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="unsignedInt"/>
          </type>
          <condition value="bdl-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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.link">
          <path value="Bundle.link"/>
          <short value="Links related to this Bundle"/>
          <definition
                      value="A series of links that provide context to this bundle."/>
          <comment
                   value="Both Bundle.link and Bundle.entry.link are defined to support providing additional context when Bundles are used (e.g. [HATEOAS](http://en.wikipedia.org/wiki/HATEOAS)).

    Bundle.entry.link corresponds to links found in the HTTP header if the resource in the entry was [read](http://hl7.org/fhir/R4/http.html#read) directly.

    This specification defines some specific uses of Bundle.link for [searching](http://hl7.org/fhir/R4/search.html#conformance) and [paging](http://hl7.org/fhir/R4/http.html#paging), but no specific uses for Bundle.entry.link, and no defined function in a transaction - the meaning is implementation specific."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Bundle.link"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.link.id">
          <path value="Bundle.link.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>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.link.extension">
          <path value="Bundle.link.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 manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.link.modifierExtension">
          <path value="Bundle.link.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 manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <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](http://hl7.org/fhir/R4/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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </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="Bundle.link.relation">
          <path value="Bundle.link.relation"/>
          <short
                 value="See http://www.iana.org/assignments/link-relations/link-relations.xhtml#link-relations-1"/>
          <definition
                      value="A name which details the functional use for this link - see [http://www.iana.org/assignments/link-relations/link-relations.xhtml#link-relations-1](http://www.iana.org/assignments/link-relations/link-relations.xhtml#link-relations-1)."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.link.relation"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.link.url">
          <path value="Bundle.link.url"/>
          <short value="Reference details for the link"/>
          <definition value="The reference details for the link."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.link.url"/>
            <min value="1"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry">
          <path value="Bundle.entry"/>
          <short
                 value="Entry in the bundle - will have a resource or information"/>
          <definition
                      value="An entry in a bundle resource - will either contain a resource or information about a resource (transactions and history only)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Bundle.entry"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <orderMeaning
                        value="For bundles of type 'document' and 'message', the first resource is special (must be Composition or MessageHeader respectively). For all bundles, the meaning of the order of entries depends on the bundle type"/>
          <constraint>
            <key value="bdl-5"/>
            <severity value="error"/>
            <human
                   value="must be a resource unless there's a request or response"/>
            <expression
                        value="resource.exists() or request.exists() or response.exists()"/>
            <xpath
                   value="exists(f:resource) or exists(f:request) or exists(f:response)"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </constraint>
          <constraint>
            <key value="bdl-8"/>
            <severity value="error"/>
            <human value="fullUrl cannot be a version specific reference"/>
            <expression value="fullUrl.contains('/_history/').not()"/>
            <xpath
                   value="not(exists(f:fullUrl[contains(string(@value), '/_history/')]))"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Bundle"/>
          </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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.id">
          <path value="Bundle.entry.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>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.extension">
          <path value="Bundle.entry.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 manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.modifierExtension">
          <path value="Bundle.entry.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 manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <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](http://hl7.org/fhir/R4/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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </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="Bundle.entry.link">
          <path value="Bundle.entry.link"/>
          <short value="Links related to this entry"/>
          <definition
                      value="A series of links that provide context to this entry."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Bundle.entry.link"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <contentReference
                            value="http://hl7.org/fhir/StructureDefinition/Bundle#Bundle.link"/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.fullUrl">
          <path value="Bundle.entry.fullUrl"/>
          <short
                 value="URI for resource (Absolute URL server address or URI for UUID/OID)"/>
          <definition
                      value="The Absolute URL for the resource.  The fullUrl SHALL NOT disagree with the id in the resource - i.e. if the fullUrl is not a urn:uuid, the URL shall be version-independent URL consistent with the Resource.id. The fullUrl is a version independent reference to the resource. The fullUrl element SHALL have a value except that:
    * fullUrl can be empty on a POST (although it does not need to when specifying a temporary id for reference in the bundle)
    * Results from operations might involve resources that are not identified."/>
          <comment
                   value="fullUrl might not be [unique in the context of a resource](http://hl7.org/fhir/R4/bundle.html#bundle-unique). Note that since [FHIR resources do not need to be served through the FHIR API](http://hl7.org/fhir/R4/references.html), the fullURL might be a URN or an absolute URL that does not end with the logical id of the resource (Resource.id). However, but if the fullUrl does look like a RESTful server URL (e.g. meets the [regex](http://hl7.org/fhir/R4/references.html#regex), then the 'id' portion of the fullUrl SHALL end with the Resource.id.

    Note that the fullUrl is not the same as the canonical URL - it's an absolute url for an endpoint serving the resource (these will happen to have the same value on the canonical server for the resource with the canonical URL)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.fullUrl"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.resource">
          <path value="Bundle.entry.resource"/>
          <short value="A resource in the bundle"/>
          <definition
                      value="The Resource for the entry. The purpose/meaning of the resource is determined by the Bundle.type."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.resource"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Resource"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.search">
          <path value="Bundle.entry.search"/>
          <short value="Search related information"/>
          <definition
                      value="Information about the search process that lead to the creation of this entry."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.search"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <condition value="bdl-2"/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.search.id">
          <path value="Bundle.entry.search.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>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.search.extension">
          <path value="Bundle.entry.search.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 manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.search.modifierExtension">
          <path value="Bundle.entry.search.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 manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <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](http://hl7.org/fhir/R4/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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </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="Bundle.entry.search.mode">
          <path value="Bundle.entry.search.mode"/>
          <short
                 value="match | include | outcome - why this is in the result set"/>
          <definition
                      value="Why this entry is in the result set - whether it's included as a match or because of an _include requirement, or to convey information or warning information about the search process."/>
          <comment
                   value="There is only one mode. In some corner cases, a resource may be included because it is both a match and an include. In these circumstances, 'match' takes precedence."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.search.mode"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="SearchEntryMode"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Why an entry is in the result set - whether it's included as a match or because of an _include requirement, or to convey information or warning information about the search process."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/search-entry-mode|4.0.1"/>
          </binding>
        </element>
        <element id="Bundle.entry.search.score">
          <path value="Bundle.entry.search.score"/>
          <short value="Search ranking (between 0 and 1)"/>
          <definition
                      value="When searching, the server's search ranking score for the entry."/>
          <comment
                   value="Servers are not required to return a ranking score. 1 is most relevant, and 0 is least relevant. Often, search results are sorted by score, but the client may specify a different sort order.

    See [Patient Match](http://hl7.org/fhir/R4/patient-operation-match.html) for the EMPI search which relates to this element."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.search.score"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="decimal"/>
          </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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.request">
          <path value="Bundle.entry.request"/>
          <short
                 value="Additional execution information (transaction/batch/history)"/>
          <definition
                      value="Additional information about how this entry should be processed as part of a transaction or batch.  For history, it shows how the entry was processed to create the version contained in the entry."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.request"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <condition value="bdl-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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.request.id">
          <path value="Bundle.entry.request.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>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.request.extension">
          <path value="Bundle.entry.request.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 manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.request.modifierExtension">
          <path value="Bundle.entry.request.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 manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <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](http://hl7.org/fhir/R4/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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </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="Bundle.entry.request.method">
          <path value="Bundle.entry.request.method"/>
          <short value="GET | HEAD | POST | PUT | DELETE | PATCH"/>
          <definition
                      value="In a transaction or batch, this is the HTTP action to be executed for this entry. In a history bundle, this indicates the HTTP action that occurred."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.request.method"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="HTTPVerb"/>
            </extension>
            <strength value="required"/>
            <description
                         value="HTTP verbs (in the HTTP command line). See [HTTP rfc](https://tools.ietf.org/html/rfc7231) for details."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/http-verb|4.0.1"/>
          </binding>
        </element>
        <element id="Bundle.entry.request.url">
          <path value="Bundle.entry.request.url"/>
          <short value="URL for HTTP equivalent of this entry"/>
          <definition
                      value="The URL for this entry, relative to the root (the address to which the request is posted)."/>
          <comment
                   value="E.g. for a Patient Create, the method would be &quot;POST&quot; and the URL would be &quot;Patient&quot;. For a Patient Update, the method would be PUT and the URL would be &quot;Patient/[id]&quot;."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.request.url"/>
            <min value="1"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.request.ifNoneMatch">
          <path value="Bundle.entry.request.ifNoneMatch"/>
          <short value="For managing cache currency"/>
          <definition
                      value="If the ETag values match, return a 304 Not Modified status. See the API documentation for [&quot;Conditional Read&quot;](http://hl7.org/fhir/R4/http.html#cread)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.request.ifNoneMatch"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.request.ifModifiedSince">
          <path value="Bundle.entry.request.ifModifiedSince"/>
          <short value="For managing cache currency"/>
          <definition
                      value="Only perform the operation if the last updated date matches. See the API documentation for [&quot;Conditional Read&quot;](http://hl7.org/fhir/R4/http.html#cread)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.request.ifModifiedSince"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="instant"/>
          </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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.request.ifMatch">
          <path value="Bundle.entry.request.ifMatch"/>
          <short value="For managing update contention"/>
          <definition
                      value="Only perform the operation if the Etag value matches. For more information, see the API section [&quot;Managing Resource Contention&quot;](http://hl7.org/fhir/R4/http.html#concurrency)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.request.ifMatch"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.request.ifNoneExist">
          <path value="Bundle.entry.request.ifNoneExist"/>
          <short value="For conditional creates"/>
          <definition
                      value="Instruct the server not to perform the create if a specified resource already exists. For further information, see the API documentation for [&quot;Conditional Create&quot;](http://hl7.org/fhir/R4/http.html#ccreate). This is just the query portion of the URL - what follows the &quot;?&quot; (not including the &quot;?&quot;)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.request.ifNoneExist"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.response">
          <path value="Bundle.entry.response"/>
          <short value="Results of execution (transaction/batch/history)"/>
          <definition
                      value="Indicates the results of processing the corresponding 'request' entry in the batch or transaction being responded to or what the results of an operation where when returning history."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.response"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <condition value="bdl-4"/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.response.id">
          <path value="Bundle.entry.response.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>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.response.extension">
          <path value="Bundle.entry.response.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 manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Bundle.entry.response.modifierExtension">
          <path value="Bundle.entry.response.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 manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <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](http://hl7.org/fhir/R4/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())"/>
            <xpath value="@value|f:*|h:div"/>
            <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()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </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="Bundle.entry.response.status">
          <path value="Bundle.entry.response.status"/>
          <short value="Status response code (text optional)"/>
          <definition
                      value="The status code returned by processing this entry. The status SHALL start with a 3 digit HTTP code (e.g. 404) and may contain the standard HTTP description associated with the status code."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.response.status"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.response.location">
          <path value="Bundle.entry.response.location"/>
          <short value="The location (if the operation returns a location)"/>
          <definition
                      value="The location header created by processing this operation, populated if the operation returns a location."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.response.location"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.response.etag">
          <path value="Bundle.entry.response.etag"/>
          <short value="The Etag for the resource (if relevant)"/>
          <definition
                      value="The Etag for the resource, if the operation for the entry produced a versioned resource (see [Resource Metadata and Versioning](http://hl7.org/fhir/R4/http.html#versioning) and [Managing Resource Contention](http://hl7.org/fhir/R4/http.html#concurrency))."/>
          <comment
                   value="Etags match the Resource.meta.versionId. The ETag has to match the version id in the header if a resource is included."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.response.etag"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.response.lastModified">
          <path value="Bundle.entry.response.lastModified"/>
          <short value="Server's date time modified"/>
          <definition
                      value="The date/time that the resource was modified on the server."/>
          <comment
                   value="This has to match the same time in the meta header (meta.lastUpdated) if a resource is included."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.response.lastModified"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="instant"/>
          </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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.entry.response.outcome">
          <path value="Bundle.entry.response.outcome"/>
          <short
                 value="OperationOutcome with hints and warnings (for batch/transaction)"/>
          <definition
                      value="An OperationOutcome containing hints and warnings produced as part of processing this entry in a batch or transaction."/>
          <comment
                   value="For a POST/PUT operation, this is the equivalent outcome that would be returned for prefer = operationoutcome - except that the resource is always returned whether or not the outcome is returned.

    This outcome is not used for error responses in batch/transaction, only for hints and warnings. In a batch operation, the error will be in Bundle.entry.response, and for transaction, there will be a single OperationOutcome instead of a bundle in the case of an error."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.entry.response.outcome"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Resource"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Bundle.signature">
          <path value="Bundle.signature"/>
          <short value="Digital Signature"/>
          <definition
                      value="Digital Signature - base64 encoded. XML-DSig or a JWT."/>
          <comment
                   value="The signature could be created by the &quot;author&quot; of the bundle or by the originating device.   Requirements around inclusion of a signature, verification of signatures and treatment of signed/non-signed bundles is implementation-environment specific."/>
          <requirements
                        value="A Signature holds an electronic representation of a signature and its supporting context in a FHIR accessible form. The signature may either be a cryptographic type (XML DigSig or a JWS), which is able to provide non-repudiation proof, or it may be a graphical image that represents a signature or a signature process. This element allows capturing signatures on documents, messages, transactions or even search responses, to support content-authentication, non-repudiation or other business cases. This is primarily relevant where the bundle may travel through multiple hops or via other mechanisms where HTTPS non-repudiation is insufficient."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Bundle.signature"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Signature"/>
          </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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
      </snapshot>
      <differential>
        <element id="Bundle">
          <path value="Bundle"/>
        </element>
        <element id="Bundle.identifier">
          <path value="Bundle.identifier"/>
          <min value="1"/>
        </element>
        <element id="Bundle.timestamp">
          <path value="Bundle.timestamp"/>
          <min value="1"/>
        </element>
      </differential>
    </StructureDefinition>