WHO Immunization Implementation Guide
1.0.0 - release

WHO Immunization Implementation Guide, published by WHO. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/WorldHealthOrganization/smart-immunizations/tree/132/merge and changes regularly. See the Directory of published versions

: IMMZ.D18.S.Measles.Supplementary dose schedule - XML Representation

Draft as of 2026-03-31

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<PlanDefinition xmlns="http://hl7.org/fhir">
  <id value="IMMZD18SMeaslesSupplementaryDose"/>
  <meta>
    <profile
             value="http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-recommendationdefinition"/>
    <profile
             value="http://hl7.org/fhir/uv/crmi/StructureDefinition/crmi-shareableplandefinition"/>
    <profile
             value="http://hl7.org/fhir/uv/crmi/StructureDefinition/crmi-publishableplandefinition"/>
  </meta>
  <text>
    <status value="extensions"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
<div>
    <table class="grid dict">
        
        <tr>
            <th scope="row"><b>Id: </b></th>
            <td style="padding-left: 4px;">IMMZD18SMeaslesSupplementaryDose</td>
        </tr>
        

        
        <tr>
            <th scope="row"><b>Url: </b></th>
            <td style="padding-left: 4px;"><a href="PlanDefinition-IMMZD18SMeaslesSupplementaryDose.html">IMMZ.D18.S.Measles.Supplementary dose schedule</a></td>
        </tr>
        

        
        <tr>
            <th scope="row"><b>Version: </b></th>
            <td style="padding-left: 4px;">1.0.0</td>
        </tr>
        

        

        
        <tr>
            <th scope="row"><b>Title: </b></th>
            <td style="padding-left: 4px;">IMMZ.D18.S.Measles.Supplementary dose schedule</td>
        </tr>
        

        

        
        <tr>
            <th scope="row"><b>Status: </b></th>
            <td style="padding-left: 4px;">draft</td>
        </tr>
        

        

        
        <tr>
            <th scope="row"><b>Type: </b></th>
            <td style="padding-left: 4px;">
                
                    
                        
                        <p style="margin-bottom: 5px;">
                            <b>system: </b> <span><a href="http://terminology.hl7.org/7.1.0/CodeSystem-plan-definition-type.html">http://terminology.hl7.org/CodeSystem/plan-definition-type</a></span>
                        </p>
                        
                        
                        <p style="margin-bottom: 5px;">
                            <b>code: </b> <span>eca-rule</span>
                        </p>
                        
                        
                    
                
                
            </td>
        </tr>
        

        

        
        <tr>
            <th scope="row"><b>Date: </b></th>
            <td style="padding-left: 4px;">2026-03-31 13:54:17+0000</td>
        </tr>
        

        
        <tr>
            <th scope="row"><b>Publisher: </b></th>
            <td style="padding-left: 4px;">WHO</td>
        </tr>
        

        
        <tr>
            <th scope="row"><b>Description: </b></th>
            <td style="padding-left: 4px;"><div><p>IMMZ.D18.S.Measles.Supplementary dose schedule
Measles supplementary dose schedule</p>
</div></td>
        </tr>
        

        
        <tr>
            <th scope="row"><b>Knowledge Capability: </b></th>
            <td style="padding-left: 4px;">
                
                computable 
            </td>
        </tr>
        

        

        

        

        

        

        

        

        

        

        
        <tr>
            <th scope="row"><b>Related Artifacts: </b></th>
            <td style="padding-left: 4px;">
                
                
                <p><b>References</b></p>
                <ul>
                    
                    <li><div><p>WHO recommendations for routine immunization - summary tables (January 2025)</p>
</div><br/><a href="null"/></li>
                    
                </ul>
                
                
                
                
                
                
            </td>
        </tr>
        

        
        <tr>
            <th scope="row"><b>Libraries: </b></th>
            <td style="padding-left: 4px;">
                <table class="grid-dict">
                    
                    <tr>
                        <td><a href="Library-IMMZD18SMeaslesSupplementaryDoseLogic.html">IMMZD18SMeaslesSupplementaryDoseLogic</a></td>
                    </tr>
                    
                </table>
            </td>
        </tr>
        

        
        <tr>
            <th scope="row"><b>Actions: </b></th>
            <td style="padding-left: 4px;">
                <table class="grid-dict">
                    
                    <tr>
                        <td>
                            
                            <b> Measles-containing vaccine (MCV) supplementary dose:</b> Provision of a MCV supplementary dose
Trigger event: Routine measles immunization schedule is complete
Trigger pseudo: &quot;Completed the primary vaccination series&quot; = TRUE (where &quot;Vaccine type&quot; = &quot;Measles-containing vaccines&quot;) AND Member States defined logic for supplementary dose applied
Trigger date: &quot;Date when the primary vaccination series was completed&quot;
Create condition: Child is due for a MCV supplementary dose if child is HIV-positive, on antiretroviral therapy (ART) and immune reconstitution has been achieved.
                            
                            <br/>
                            
                            
                            <b>If:</b>
                            
                            <i>Applicability:</i>
                            
                            Measles-containing vaccine (MCV) supplementary dose
                            
                            <i>(Measles-containing vaccine (MCV) supplementary dose)</i>
                            <br/>
                            
                            
                            
                            
                            <b>Then:</b> <i>Definition:</i> <a href="ActivityDefinition-IMMZD2DTCR.html">IMMZ.D2.DT.CR</a><br/>
                            
                            <i>Dynamic Values:</i><br/>
                            
                            status: <i>('active')</i>
                            <br/>
                            
                            payload.contentString: <i>(Measles-containing vaccine (MCV) supplementary dose Create)</i>
                            <br/>
                            
                            category.coding: <i>(Code { system: 'http://terminology.hl7.org/CodeSystem/communication-category', code: 'alert' })</i>
                            <br/>
                            
                            priority: <i>(Code { system: 'http://hl7.org/fhir/request-priority', code: 'routine' })</i>
                            <br/>
                            
                            
                            
                            
                        </td>
                    </tr>
                    
                </table>
            </td>
        </tr>
        
    </table>
</div>
</div>
  </text>
  <contained>
    <Library>
      <id value="effective-data-requirements"/>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-directReferenceCode">
        <valueCoding>
          <system
                  value="http://smart.who.int/immunizations/CodeSystem/IMMZ.D"/>
          <code value="DE203"/>
          <display value="Completed the primary vaccination series"/>
        </valueCoding>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZElements"/>
        </extension>
        <extension url="name">
          <valueString value="Doses Administered to Patient"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/**
 * @dataElement All Doses Administered to Patient
 */
define &quot;Doses Administered to Patient&quot;:
  [Immunization] I
    where I.status = 'completed'
    and I.isSubpotent is not true"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="0"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesElements"/>
        </extension>
        <extension url="name">
          <valueString value="MCV Doses Administered to Patient"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: MCV Doses Administered to Patient
*/
define &quot;MCV Doses Administered to Patient&quot;:
  Elements.&quot;Doses Administered to Patient&quot; I
  where
    I.vaccineCode in Concepts.&quot;Measles-containing vaccines&quot;"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="1"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="MCV Supplementary Doses Administered to Patient"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: MCV Supplementary Doses Administered to Patient
*/
define &quot;MCV Supplementary Doses Administered to Patient&quot;:
  &quot;MCV Doses Administered to Patient&quot;.seriesSupplementary()"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="2"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="MCV Supplementary Doses Administered to Patient"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: MCV Supplementary Doses Administered to Patient
*/
define &quot;MCV Supplementary Doses Administered to Patient&quot;:
  MeaslesElements.&quot;MCV Supplementary Doses Administered to Patient&quot;.onOrBefore(Today)"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="3"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Number of MCV Supplementary Doses Administered"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: Number of MCV Supplementary Doses Administered
*/
define &quot;Number of MCV Supplementary Doses Administered&quot;:
  Count(&quot;MCV Supplementary Doses Administered to Patient&quot;)"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="4"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString value="Measles supplementary dose was administered"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@input: Measles supplementary dose was administered
@pseudocode: Count of vaccines administered (where &quot;Vaccine type&quot; = &quot;Measles-containing vaccines&quot; and &quot;Type of dose&quot; = &quot;Supplementary dose&quot;) = 1
@code: Measles supplementary dose was administered-131
@decision: IMMZ.D2.DT.Measles.Supplementary dose: Measles-containing vaccine (MCV) supplementary dose administration
*/
define &quot;Measles supplementary dose was administered&quot;:
  &quot;Number of MCV Supplementary Doses Administered&quot; = 1"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="5"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD18SMeaslesSupplementaryDoseLogic"/>
        </extension>
        <extension url="name">
          <valueString value="MCV supplementary dose was administered"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@complete: MCV supplementary dose was administered
@pseudocode: Count of vaccines administered (where &quot;Vaccine type&quot; = &quot;Measles-containing vaccines&quot; and &quot;Type of dose&quot; = &quot;Supplementary dose&quot;) = 1
*/
define &quot;MCV supplementary dose was administered&quot;:
  Encounter.&quot;Measles supplementary dose was administered&quot;"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="6"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="MCV Primary Series Doses Administered to Patient"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: MCV Primary Series Doses Administered to Patient
*/
define &quot;MCV Primary Series Doses Administered to Patient&quot;:
  &quot;MCV Doses Administered to Patient&quot;.seriesPrimary()"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="7"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="MCV Primary Series Doses Administered to Patient"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: MCV Primary Series Doses Administered to Patient
*/
define &quot;MCV Primary Series Doses Administered to Patient&quot;:
  MeaslesElements.&quot;MCV Primary Series Doses Administered to Patient&quot;.onOrBefore(Today)"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="8"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Number of MCV Primary Series Doses Administered"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: Number of MCV Primary Series Doses Administered
*/
define &quot;Number of MCV Primary Series Doses Administered&quot;:
  Count(&quot;MCV Primary Series Doses Administered to Patient&quot;)"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="9"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString value="MCV2 was administered"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@input: MCV2 was administered
@pseudocode: Count of vaccines administered (where &quot;Vaccine type&quot; = &quot;Measles-containing vaccines&quot; and &quot;Type of dose&quot; = &quot;Primary series&quot;) = 2
@code: MCV2 was administered-127
@decision: IMMZ.D2.DT.Measles.Ongoing transmission: Countries with ongoing transmission in which the risk of measles mortality remains high (countries that provide first dose of measles-containing vaccine (MCV) at 9 months and second dose of MCV at 15 months)
@decision: IMMZ.D2.DT.Measles.Low transmission: Countries with low levels of measles transmission (countries that provide first dose of measles-containing vaccine (MCV) at 12 months and second dose of MCV at 15 months)
*/
define &quot;MCV2 was administered&quot;:
  &quot;Number of MCV Primary Series Doses Administered&quot; = 2"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="10"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString value="MCV Doses Administered to Patient"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: MCV Doses Administered to Patient
*/
define &quot;MCV Doses Administered to Patient&quot;:
  MeaslesElements.&quot;MCV Doses Administered to Patient&quot;.onOrBefore(Today)"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="11"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Completed the primary vaccination series Observation"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: Completed the primary vaccination series Observation
*/
define &quot;Completed the primary vaccination series Observation&quot;:
  ([Observation: Concepts.&quot;Completed the primary vaccination series&quot;]).complete()"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="12"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Completed the primary vaccination series Observation"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: Completed the primary vaccination series Observation
*/
define &quot;Completed the primary vaccination series Observation&quot;:
  Elements.&quot;Completed the primary vaccination series Observation&quot;.encounterOrOnBefore(EncounterId, Today)"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="13"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Measles routine immunization schedule is complete"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@input: Measles routine immunization schedule is complete
@pseudocode: &quot;Completed the primary vaccination series&quot; = TRUE (where &quot;Vaccine type&quot; = &quot;Measles-containing vaccines&quot;)
@code: Measles routine immunization schedule is complete-104
@decision: IMMZ.D2.DT.Measles.Supplementary dose: Measles-containing vaccine (MCV) supplementary dose administration
*/
define &quot;Measles routine immunization schedule is complete&quot;:
  &quot;MCV2 was administered&quot;
  or
  Coalesce(
    &quot;MCV Doses Administered to Patient&quot; Dose
    aggregate Result: Encounter.&quot;Completed the primary vaccination series Observation&quot;.partOf.references(Dose) or Result,
    false )"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="14"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD18SMeaslesSupplementaryDoseLogic"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Measles-containing vaccine (MCV) supplementary dose"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@output: Measles-containing vaccine (MCV) supplementary dose
@description: Provision of a MCV supplementary dose
@trigger: Routine measles immunization schedule is complete
@pseudo: &quot;Completed the primary vaccination series&quot; = TRUE (where &quot;Vaccine type&quot; = &quot;Measles-containing vaccines&quot;) AND Member States defined logic for supplementary dose applied
@triggerDate: &quot;Date when the primary vaccination series was completed&quot;
*/
define &quot;Measles-containing vaccine (MCV) supplementary dose&quot;:
  not &quot;MCV supplementary dose was administered&quot; and Encounter.&quot;Measles routine immunization schedule is complete&quot;"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="15"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD2DTMeaslesEncounterElements"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Date when the primary vaccination series completed"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@internal: Date when the primary vaccination series completed
*/
define &quot;Date when the primary vaccination series completed&quot;:
  date from start of &quot;MCV Primary Series Doses Administered to Patient&quot;.mostRecent().occurrence.toInterval()"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="16"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD18SMeaslesSupplementaryDoseLogic"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Measles-containing vaccine (MCV) supplementary dose Due Date"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@dynamicValue: Measles-containing vaccine (MCV) supplementary dose Due Date
@pseudocode: &quot;Date when the primary vaccination series completed&quot; + 4 weeks
*/
define &quot;Measles-containing vaccine (MCV) supplementary dose Due Date&quot;:
  if &quot;Measles-containing vaccine (MCV) supplementary dose&quot; then Encounter.&quot;Date when the primary vaccination series completed&quot; + 4 weeks
  else null"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="17"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZD18SMeaslesSupplementaryDoseLogic"/>
        </extension>
        <extension url="name">
          <valueString
                       value="Measles-containing vaccine (MCV) supplementary dose Create"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@output: Measles-containing vaccine (MCV) supplementary dose Create
@create: Child is due for a MCV supplementary dose if child is HIV-positive, on antiretroviral therapy (ART) and immune reconstitution has been achieved.
*/
define &quot;Measles-containing vaccine (MCV) supplementary dose Create&quot;:
  if &quot;Measles-containing vaccine (MCV) supplementary dose&quot;
  then 'Child is due for a MCV supplementary dose if child is HIV-positive, on antiretroviral therapy (ART) and immune reconstitution has been achieved.' + '
Due Date: ' + ToString(&quot;Measles-containing vaccine (MCV) supplementary dose Due Date&quot;)
  else ''"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="18"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZCommon"/>
        </extension>
        <extension url="name">
          <valueString value="onOrBefore"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/**
 * @description: Gets immunizations on or before a date
 */
define fluent function onOrBefore(immunizations List&lt;Immunization&gt;, beforeDate Date):
  immunizations I where
    I.occurrence.toInterval() same day or before beforeDate"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="19"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="WHOCommon"/>
        </extension>
        <extension url="name">
          <valueString value="toInterval"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
From FHIRCommon 4.1.0:
*/

/*
@description: Normalizes a value that is a choice of timing-valued types to an equivalent interval
@comment: Normalizes a choice type of FHIR.dateTime, FHIR.Period, FHIR.Timing, FHIR.instance, FHIR.string, FHIR.Age, or FHIR.Range types
to an equivalent interval. This selection of choice types is a superset of the majority of choice types that are used as possible
representations for timing-valued elements in FHIR, allowing this function to be used across any resource.

The input can be provided as a dateTime, Period, Timing, instant, string, Age, or Range.
The intent of this function is to provide a clear and concise mechanism to treat single
elements that have multiple possible representations as intervals so that logic doesn't have to account
for the variability. More complex calculations (such as medication request period or dispense period
calculation) need specific guidance and consideration. That guidance may make use of this function, but
the focus of this function is on single element calculations where the semantics are unambiguous.
If the input is a dateTime, the result a DateTime Interval beginning and ending on that dateTime.
If the input is a Period, the result is a DateTime Interval.
If the input is a Timing, an error is raised indicating a single interval cannot be computed from a Timing.
If the input is an instant, the result is a DateTime Interval beginning and ending on that instant.
If the input is a string, an error is raised indicating a single interval cannot be computed from a string.
If the input is an Age, the result is a DateTime Interval beginning when the patient was the given Age,
and ending immediately prior to when the patient was the given Age plus one year.
If the input is a Range, the result is a DateTime Interval beginning when the patient was the Age given
by the low end of the Range, and ending immediately prior to when the patient was the Age given by the
high end of the Range plus one year.

NOTE: Due to the
complexity of determining a single interval from a Timing or String type, this function will throw a run-time exception if it is used
with a Timing or String.
*/
define fluent function toInterval(choice Choice&lt;FHIR.dateTime, FHIR.Period, FHIR.Timing, FHIR.instant, FHIR.string, FHIR.Age, FHIR.Range&gt;):
  case
    when choice is FHIR.dateTime then
      Interval[FHIRHelpers.ToDateTime(choice as FHIR.dateTime), FHIRHelpers.ToDateTime(choice as FHIR.dateTime)]
    when choice is FHIR.Period then
      FHIRHelpers.ToInterval(choice as FHIR.Period)
    when choice is FHIR.instant then
      Interval[FHIRHelpers.ToDateTime(choice as FHIR.instant), FHIRHelpers.ToDateTime(choice as FHIR.instant)]
    when choice is FHIR.Age then
      Interval[FHIRHelpers.ToDate(Patient.birthDate) + FHIRHelpers.ToQuantity(choice as FHIR.Age),
        FHIRHelpers.ToDate(Patient.birthDate) + FHIRHelpers.ToQuantity(choice as FHIR.Age) + 1 year)
    when choice is FHIR.Range then
      Interval[FHIRHelpers.ToDate(Patient.birthDate) + FHIRHelpers.ToQuantity((choice as FHIR.Range).low),
        FHIRHelpers.ToDate(Patient.birthDate) + FHIRHelpers.ToQuantity((choice as FHIR.Range).high) + 1 year)
    when choice is FHIR.Timing then
      Message(null as Interval&lt;DateTime&gt;, true, 'NOT_IMPLEMENTED', 'Error', 'Calculation of an interval from a Timing value is not supported')
    when choice is FHIR.string then
      Message(null as Interval&lt;DateTime&gt;, true, 'NOT_IMPLEMENTED', 'Error', 'Calculation of an interval from a String value is not supported')
    else
      null as Interval&lt;DateTime&gt;
  end"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="20"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToDateTime"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToDateTime(value dateTime): value.value"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="21"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToInterval"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToInterval(period FHIR.Period):
    if period is null then
        null
    else
        if period.&quot;start&quot; is null then
            Interval(period.&quot;start&quot;.value, period.&quot;end&quot;.value]
        else
            Interval[period.&quot;start&quot;.value, period.&quot;end&quot;.value]"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="22"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToDateTime"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToDateTime(value instant): value.value"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="23"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToDate"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToDate(value date): value.value"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="24"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToQuantity"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToQuantity(quantity FHIR.Quantity):
    case
        when quantity is null then null
        when quantity.value is null then null
        when quantity.comparator is not null then
            Message(null, true, 'FHIRHelpers.ToQuantity.ComparatorQuantityNotSupported', 'Error', 'FHIR Quantity value has a comparator and cannot be converted to a System.Quantity value.')
        when quantity.system is null or quantity.system.value = 'http://unitsofmeasure.org'
              or quantity.system.value = 'http://hl7.org/fhirpath/CodeSystem/calendar-units' then
            System.Quantity { value: quantity.value.value, unit: ToCalendarUnit(Coalesce(quantity.code.value, quantity.unit.value, '1')) }
        else
            Message(null, true, 'FHIRHelpers.ToQuantity.InvalidFHIRQuantity', 'Error', 'Invalid FHIR Quantity code: ' &amp; quantity.unit.value &amp; ' (' &amp; quantity.system.value &amp; '|' &amp; quantity.code.value &amp; ')')
    end"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="25"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToCalendarUnit"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToCalendarUnit(unit System.String):
    case unit
        when 'ms' then 'millisecond'
        when 's' then 'second'
        when 'min' then 'minute'
        when 'h' then 'hour'
        when 'd' then 'day'
        when 'wk' then 'week'
        when 'mo' then 'month'
        when 'a' then 'year'
        else unit
    end"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="26"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZCommon"/>
        </extension>
        <extension url="name">
          <valueString value="seriesSupplementary"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/**
 * @description: Gets the doses from the Supplementary series
 */
define fluent function seriesSupplementary(immunizations List&lt;Immunization&gt;):
  immunizations I where
    exists( I.protocolApplied pa where pa.series = 'Supplementary dose' )"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="27"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToString"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToString(value string): value.value"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="28"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToString"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToString(value ImmunizationStatus): value.value"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="29"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToBoolean"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToBoolean(value boolean): value.value"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="30"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToConcept"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToConcept(concept FHIR.CodeableConcept):
    if concept is null then
        null
    else
        System.Concept {
            codes: concept.coding C return ToCode(C),
            display: concept.text.value
        }"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="31"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToCode"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToCode(coding FHIR.Coding):
    if coding is null then
        null
    else
        System.Code {
          code: coding.code.value,
          system: coding.system.value,
          version: coding.version.value,
          display: coding.display.value
        }"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="32"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZCommon"/>
        </extension>
        <extension url="name">
          <valueString value="seriesPrimary"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/**
 * @description: Gets the doses from the primary series
 */
define fluent function seriesPrimary(immunizations List&lt;Immunization&gt;):
  immunizations I where
    exists( I.protocolApplied pa where pa.series = 'Primary series' )"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="33"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="WHOCommon"/>
        </extension>
        <extension url="name">
          <valueString value="references"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@description: Returns true if any of the given references are to the given resource
@comment: Returns true if the `id` element of the given resource exactly equals the tail of any of the given references.
NOTE: This function assumes resources from the same source server.
*/
define fluent function references(references List&lt;FHIR.Reference&gt;, resource FHIR.Resource):
  exists (references R where R.references(resource))"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="34"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="WHOCommon"/>
        </extension>
        <extension url="name">
          <valueString value="references"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@description: Returns true if the given reference is to the given resource
@comment: Returns true if the `id` element of the given resource exactly equals the tail of the given reference.
NOTE: This function assumes resources from the same source server.
*/
define fluent function references(reference FHIR.Reference, resource FHIR.Resource):
  resource.id = Last(Split(reference.reference, '/'))"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="35"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="IMMZCommon"/>
        </extension>
        <extension url="name">
          <valueString value="encounterOrOnBefore"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/**
 * @description: Gets observation from an encounter or on or before a date
 */
define fluent function encounterOrOnBefore(observations List&lt;Observation&gt;, EncounterId String, beforeDate Date):
  observations O where
    (O.encounter.references(EncounterId)
      or O.effective.toInterval() starts same day or before beforeDate)"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="36"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="WHOCommon"/>
        </extension>
        <extension url="name">
          <valueString value="references"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="/*
@description: Returns true if the given reference is to the given resourceId
@comment: Returns true if the `resourceId` parameter exactly equals the tail of the given reference.
NOTE: This function assumes resources from the same source server.
*/
define fluent function references(reference FHIR.Reference, resourceId String):
  resourceId = Last(Split(reference.reference, '/'))"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="37"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="WHOCommon"/>
        </extension>
        <extension url="name">
          <valueString value="complete"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define fluent function complete(observations List&lt;Observation&gt;):
  observations O where O.status in { 'final', 'amended', 'corrected' }"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="38"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="FHIRHelpers"/>
        </extension>
        <extension url="name">
          <valueString value="ToString"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define function ToString(value ObservationStatus): value.value"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="39"/>
        </extension>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/cqf-logicDefinition">
        <extension url="libraryName">
          <valueString value="WHOCommon"/>
        </extension>
        <extension url="name">
          <valueString value="mostRecent"/>
        </extension>
        <extension url="statement">
          <valueString
                       value="define fluent function mostRecent(immunizations List&lt;Immunization&gt;):
  Last(
    immunizations I
      sort by start of occurrence.toInterval()
  )"/>
        </extension>
        <extension url="displaySequence">
          <valueInteger value="40"/>
        </extension>
      </extension>
      <name value="EffectiveDataRequirements"/>
      <status value="active"/>
      <type>
        <coding>
          <system value="http://terminology.hl7.org/CodeSystem/library-type"/>
          <code value="module-definition"/>
        </coding>
      </type>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="FHIR model information"/>
        <resource
                  value="http://fhir.org/guides/cqf/common/Library/FHIR-ModelInfo|4.0.1"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library Encounter"/>
        <resource
                  value="http://smart.who.int/immunizations/Library/IMMZD2DTMeaslesEncounterElements"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library Common"/>
        <resource
                  value="http://smart.who.int/immunizations/Library/IMMZCommon"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library WC"/>
        <resource
                  value="http://smart.who.int/immunizations/Library/WHOCommon"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library FHIRHelpers"/>
        <resource
                  value="http://fhir.org/guides/cqf/common/Library/FHIRHelpers|4.0.1"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library MeaslesElements"/>
        <resource
                  value="http://smart.who.int/immunizations/Library/IMMZD2DTMeaslesElements"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library Elements"/>
        <resource
                  value="http://smart.who.int/immunizations/Library/IMMZElements"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library Concepts"/>
        <resource
                  value="http://smart.who.int/immunizations/Library/IMMZConcepts"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Library Encounter"/>
        <resource
                  value="http://smart.who.int/immunizations/Library/IMMZEncounterElements"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Code system IMMZD"/>
        <resource
                  value="http://smart.who.int/immunizations/CodeSystem/IMMZ.D"/>
      </relatedArtifact>
      <relatedArtifact>
        <type value="depends-on"/>
        <display value="Value set Measles-containing vaccines"/>
        <resource
                  value="http://smart.who.int/immunizations/ValueSet/IMMZ.Z.DE9"/>
      </relatedArtifact>
      <parameter>
        <name value="Today"/>
        <use value="in"/>
        <min value="0"/>
        <max value="1"/>
        <type value="date"/>
      </parameter>
      <parameter>
        <name value="EncounterId"/>
        <use value="in"/>
        <min value="0"/>
        <max value="1"/>
        <type value="string"/>
      </parameter>
      <parameter>
        <name
              value="Measles-containing vaccine (MCV) supplementary dose Create"/>
        <use value="out"/>
        <min value="0"/>
        <max value="1"/>
        <type value="string"/>
      </parameter>
      <parameter>
        <name value="Measles-containing vaccine (MCV) supplementary dose"/>
        <use value="out"/>
        <min value="0"/>
        <max value="1"/>
        <type value="boolean"/>
      </parameter>
      <dataRequirement>
        <type value="Patient"/>
        <profile value="http://hl7.org/fhir/StructureDefinition/Patient"/>
        <mustSupport value="birthDate"/>
      </dataRequirement>
      <dataRequirement>
        <type value="Immunization"/>
        <profile
                 value="http://hl7.org/fhir/StructureDefinition/Immunization"/>
        <mustSupport value="status"/>
        <mustSupport value="isSubpotent"/>
        <mustSupport value="occurrence"/>
        <mustSupport value="protocolApplied"/>
        <codeFilter>
          <path value="status"/>
          <code>
            <code value="completed"/>
          </code>
        </codeFilter>
      </dataRequirement>
      <dataRequirement>
        <type value="Immunization"/>
        <profile
                 value="http://hl7.org/fhir/StructureDefinition/Immunization"/>
        <mustSupport value="occurrence"/>
        <mustSupport value="protocolApplied"/>
      </dataRequirement>
      <dataRequirement>
        <type value="Immunization"/>
        <profile
                 value="http://hl7.org/fhir/StructureDefinition/Immunization"/>
        <mustSupport value="status"/>
        <mustSupport value="isSubpotent"/>
        <mustSupport value="vaccineCode"/>
        <mustSupport value="occurrence"/>
        <mustSupport value="protocolApplied"/>
        <codeFilter>
          <path value="status"/>
          <code>
            <code value="completed"/>
          </code>
        </codeFilter>
        <codeFilter>
          <path value="vaccineCode"/>
          <valueSet
                    value="http://smart.who.int/immunizations/ValueSet/IMMZ.Z.DE9"/>
        </codeFilter>
      </dataRequirement>
      <dataRequirement>
        <type value="Resource"/>
        <profile value="http://hl7.org/fhir/StructureDefinition/Resource"/>
        <mustSupport value="id"/>
      </dataRequirement>
      <dataRequirement>
        <type value="Observation"/>
        <profile value="http://hl7.org/fhir/StructureDefinition/Observation"/>
        <mustSupport value="code"/>
        <mustSupport value="encounter"/>
        <mustSupport value="effective"/>
        <mustSupport value="status"/>
        <codeFilter>
          <path value="code"/>
          <code>
            <system
                    value="http://smart.who.int/immunizations/CodeSystem/IMMZ.D"/>
            <code value="DE203"/>
            <display value="Completed the primary vaccination series"/>
          </code>
        </codeFilter>
      </dataRequirement>
    </Library>
  </contained>
  <extension
             url="http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-knowledgeCapability">
    <valueCode value="computable"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/uv/crmi/StructureDefinition/crmi-effectiveDataRequirements">
    <valueCanonical value="#effective-data-requirements"/>
  </extension>
  <url
       value="http://smart.who.int/immunizations/PlanDefinition/IMMZD18SMeaslesSupplementaryDose"/>
  <version value="1.0.0"/>
  <name value="IMMZD18SMeaslesSupplementaryDose"/>
  <title value="IMMZ.D18.S.Measles.Supplementary dose schedule"/>
  <type>
    <coding>
      <system
              value="http://terminology.hl7.org/CodeSystem/plan-definition-type"/>
      <code value="eca-rule"/>
    </coding>
  </type>
  <status value="draft"/>
  <experimental value="false"/>
  <date value="2026-03-31T13:54:17+00:00"/>
  <publisher value="WHO"/>
  <contact>
    <name value="WHO"/>
    <telecom>
      <system value="url"/>
      <value value="http://who.int"/>
    </telecom>
  </contact>
  <description
               value="IMMZ.D18.S.Measles.Supplementary dose schedule
Measles supplementary dose schedule"/>
  <relatedArtifact>
    <type value="citation"/>
    <citation
              value="WHO recommendations for routine immunization - summary tables (January 2025)"/>
  </relatedArtifact>
  <library
           value="http://smart.who.int/immunizations/Library/IMMZD18SMeaslesSupplementaryDoseLogic"/>
  <action>
    <title value="Measles-containing vaccine (MCV) supplementary dose"/>
    <description
                 value="Provision of a MCV supplementary dose
Trigger event: Routine measles immunization schedule is complete
Trigger pseudo: &quot;Completed the primary vaccination series&quot; = TRUE (where &quot;Vaccine type&quot; = &quot;Measles-containing vaccines&quot;) AND Member States defined logic for supplementary dose applied
Trigger date: &quot;Date when the primary vaccination series was completed&quot;
Create condition: Child is due for a MCV supplementary dose if child is HIV-positive, on antiretroviral therapy (ART) and immune reconstitution has been achieved."/>
    <condition>
      <kind value="applicability"/>
      <expression>
        <description
                     value="Measles-containing vaccine (MCV) supplementary dose"/>
        <language value="text/cql-identifier"/>
        <expression
                    value="Measles-containing vaccine (MCV) supplementary dose"/>
      </expression>
    </condition>
    <definitionCanonical
                         value="http://smart.who.int/immunizations/ActivityDefinition/IMMZD2DTCR"/>
    <dynamicValue>
      <path value="status"/>
      <expression>
        <language value="text/cql-expression"/>
        <expression value="'active'"/>
      </expression>
    </dynamicValue>
    <dynamicValue>
      <path value="payload.contentString"/>
      <expression>
        <language value="text/cql-identifier"/>
        <expression
                    value="Measles-containing vaccine (MCV) supplementary dose Create"/>
      </expression>
    </dynamicValue>
    <dynamicValue>
      <path value="category.coding"/>
      <expression>
        <description value="Category of communication"/>
        <language value="text/cql-expression"/>
        <expression
                    value="Code { system: 'http://terminology.hl7.org/CodeSystem/communication-category', code: 'alert' }"/>
      </expression>
    </dynamicValue>
    <dynamicValue>
      <path value="priority"/>
      <expression>
        <description value="Alert priority"/>
        <language value="text/cql-expression"/>
        <expression
                    value="Code { system: 'http://hl7.org/fhir/request-priority', code: 'routine' }"/>
      </expression>
    </dynamicValue>
  </action>
</PlanDefinition>