<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="MeasureCriteria" />
  <text>
    <status value="extensions" />
    <div xmlns="http://www.w3.org/1999/xhtml">
      <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 : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a href="http://hl7.org/fhir/R4/formats.html#table" title="The logical name of the element">Name</a>
          </th>
          <th style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a href="http://hl7.org/fhir/R4/formats.html#table" title="Information about the use of the element">Flags</a>
          </th>
          <th style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a href="http://hl7.org/fhir/R4/formats.html#table" title="Minimum and Maximum # of times the the element can appear in the instance">Card.</a>
          </th>
          <th style="width: 100px" class="hierarchy">
            <a href="http://hl7.org/fhir/R4/formats.html#table" title="Reference to the type of the element">Type</a>
          </th>
          <th style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a href="http://hl7.org/fhir/R4/formats.html#table" title="Additional information about the element">Description &amp; Constraints</a>
            <span style="float: right">
              <a href="http://hl7.org/fhir/R4/formats.html#table" title="Legend for this format">
                <img src="http://hl7.org/fhir/R4/help16.png" 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 : 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_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy" />
            <a href="StructureDefinition-MeasureCriteria-definitions.html#Expression">Expression</a>
            <a name="Expression"></a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy" />
          <td style="vertical-align: top; text-align : 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 : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a href="http://hl7.org/fhir/R4/datatypes.html#Expression">Expression</a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <span style="opacity: 0.5">An expression that can be used to generate a value</span>
          </td>
        </tr>
        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7">
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck14.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_slice_item.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Slice Item" class="hierarchy" />
            <a href="StructureDefinition-MeasureCriteria-definitions.html#Expression.extension:alternateCriteria" title="Extension URL = http://hl7.org/fhir/uv/saner/StructureDefinition/MeasureAlternateCriteria">MeasureAlternateCriteria</a>
            <a name="Expression.extension"></a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy" />
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a href="StructureDefinition-MeasureCriteria.html" title="Expression">MeasureCriteria</a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">Other expressions for computing the criterion<br /><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/R4/StructureDefinition-MeasureAlternateCriteria.html">http://hl7.org/fhir/uv/saner/StructureDefinition/MeasureAlternateCriteria</a></td>
        </tr>
        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white">
          <td style="vertical-align: top; text-align : left; background-color: white; 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: white; background-color: inherit" title="Element" class="hierarchy" />
            <a href="StructureDefinition-MeasureCriteria-definitions.html#Expression.description">description</a>
            <a name="Expression.description"></a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <span style="padding-left: 3px; padding-right: 3px; color: white; background-color: red" title="This element must be supported">S</span>
          </td>
          <td style="vertical-align: top; text-align : 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 : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a style="opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#string">string</a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">Describe what the criterion does to a human (non-engineer)</td>
        </tr>
        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7">
          <td style="vertical-align: top; text-align : 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-MeasureCriteria-definitions.html#Expression.name">name</a>
            <a name="Expression.name"></a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <span style="padding-left: 3px; padding-right: 3px; color: white; background-color: red" title="This element must be supported">S</span>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; 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">1</span>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a style="opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#id">id</a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">name should align with code.</td>
        </tr>
        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white">
          <td style="vertical-align: top; text-align : left; background-color: white; 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: white; background-color: inherit" title="Element" class="hierarchy" />
            <a href="StructureDefinition-MeasureCriteria-definitions.html#Expression.language">language</a>
            <a name="Expression.language"></a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <span style="padding-left: 3px; padding-right: 3px; color: white; background-color: red" title="This element must be supported">S</span>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <span style="opacity: 0.5">1</span>
            <span style="opacity: 0.5">..</span>
            <span style="opacity: 0.5">1</span>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a style="opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#code">code</a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">Provide the language for the criterion</td>
        </tr>
        <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7">
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; 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: #F7F7F7; background-color: inherit" title="Element" class="hierarchy" />
            <a href="StructureDefinition-MeasureCriteria-definitions.html#Expression.expression">expression</a>
            <a name="Expression.expression"></a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <span style="padding-left: 3px; padding-right: 3px; color: white; background-color: red" title="This element must be supported">S</span>
          </td>
          <td style="vertical-align: top; text-align : 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 : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">
            <a style="opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#string">string</a>
          </td>
          <td style="vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">A measure must describe how to automate the computation in an expression that can be evaluated in the specified language</td>
        </tr>
        <tr>
          <td colspan="5" class="hierarchy">
            <br />
            <a href="http://hl7.org/fhir/R4/formats.html#table" title="Legend for this format">
              <img src="http://hl7.org/fhir/R4/help16.png" alt="doco" style="background-color: inherit" /> Documentation for this format</a>
          </td>
        </tr>
      </table>
    </div>
  </text>
  <url value="http://hl7.org/fhir/uv/saner/StructureDefinition/MeasureCriteria" />
  <version value="1.0.1" />
  <name value="MeasureCriteria" />
  <status value="draft" />
  <experimental value="true" />
  <date value="2022-02-15T21:33:20+00:00" />
  <publisher value="HL7 International Public Health Workgroup" />
  <contact>
    <telecom>
      <system value="url" />
      <value value="http://hl7.org/Special/committees/pher" />
    </telecom>
  </contact>
  <contact>
    <telecom>
      <system value="email" />
      <value value="pher@lists.hl7.org" />
    </telecom>
  </contact>
  <contact>
    <name value="Keith W. Boone" />
    <telecom>
      <system value="email" />
      <value value="mailto:kboone@ainq.com" />
    </telecom>
  </contact>
  <description value="Constraints on documentation for the evaluation of a Measure" />
  <jurisdiction>
    <coding>
      <system value="http://unstats.un.org/unsd/methods/m49/m49.htm" />
      <code value="001" />
    </coding>
  </jurisdiction>
  <fhirVersion value="4.0.1" />
  <mapping>
    <identity value="rim" />
    <uri value="http://hl7.org/v3" />
    <name value="RIM Mapping" />
  </mapping>
  <kind value="complex-type" />
  <abstract value="false" />
  <type value="Expression" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Expression" />
  <derivation value="constraint" />
  <snapshot>
    <element id="Expression">
      <path value="Expression" />
      <short value="An expression that can be used to generate a value" />
      <definition value="A expression that is evaluated in a specified context and returns a value. The context of use of the expression must specify the context in which the expression is evaluated, and how the result of the expression is used." />
      <min value="0" />
      <max value="*" />
      <base>
        <path value="Expression" />
        <min value="0" />
        <max value="*" />
      </base>
      <condition value="ele-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>
      <constraint>
        <key value="exp-1" />
        <severity value="error" />
        <human value="An expression or a reference must be provided" />
        <expression value="expression.exists() or reference.exists()" />
        <xpath value="exists(f:expression) or exists(f:reference)" />
        <source value="http://hl7.org/fhir/StructureDefinition/Expression" />
      </constraint>
      <isModifier value="false" />
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element id="Expression.id">
      <path value="Expression.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="Expression.extension">
      <path value="Expression.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <description value="Extensions are always sliced by (at least) url" />
        <rules value="open" />
      </slicing>
      <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="Expression.extension:alternateCriteria">
      <path value="Expression.extension" />
      <sliceName value="alternateCriteria" />
      <short value="Other expressions for computing the criterion" />
      <definition value="Provides Alternate criteria for performing a measure, (e.g., CQL, Drools, et cetera)" />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Element.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
        <profile value="http://hl7.org/fhir/uv/saner/StructureDefinition/MeasureAlternateCriteria" />
      </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" />
    </element>
    <element id="Expression.description">
      <path value="Expression.description" />
      <short value="Describe what the criterion does to a human (non-engineer)" />
      <definition value="A brief, natural language description of the condition that effectively communicates the intended semantics." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Expression.description" />
        <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>
      <mustSupport value="true" />
      <isModifier value="false" />
      <isSummary value="true" />
    </element>
    <element id="Expression.name">
      <path value="Expression.name" />
      <short value="name should align with code." />
      <definition value="A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Expression.name" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="id" />
      </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>
      <mustSupport value="true" />
      <isModifier value="false" />
      <isSummary value="true" />
    </element>
    <element id="Expression.language">
      <path value="Expression.language" />
      <short value="Provide the language for the criterion" />
      <definition value="The media type of the language for the expression." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Expression.language" />
        <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>
      <mustSupport value="true" />
      <isModifier value="false" />
      <isSummary value="true" />
      <binding>
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
          <valueCanonical value="http://www.rfc-editor.org/bcp/bcp13.txt" />
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="ExpressionLanguage" />
        </extension>
        <strength value="extensible" />
        <description value="The media type of the expression language." />
        <valueSet value="http://hl7.org/fhir/ValueSet/expression-language" />
      </binding>
    </element>
    <element id="Expression.expression">
      <path value="Expression.expression" />
      <short value="A measure must describe how to automate the computation in an expression that can be evaluated in the specified language" />
      <definition value="An expression in the specified language that returns a value." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Expression.expression" />
        <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>
      <mustSupport value="true" />
      <isModifier value="false" />
      <isSummary value="true" />
    </element>
    <element id="Expression.reference">
      <path value="Expression.reference" />
      <short value="Where the expression is found" />
      <definition value="A URI that defines where the expression is found." />
      <comment value="If both a reference and an expression is found, the reference SHALL point to the same expression." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Expression.reference" />
        <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>
  </snapshot>
  <differential>
    <element id="Expression">
      <path value="Expression" />
    </element>
    <element id="Expression.extension:alternateCriteria">
      <path value="Expression.extension" />
      <sliceName value="alternateCriteria" />
      <short value="Other expressions for computing the criterion" />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="http://hl7.org/fhir/uv/saner/StructureDefinition/MeasureAlternateCriteria" />
      </type>
    </element>
    <element id="Expression.description">
      <path value="Expression.description" />
      <short value="Describe what the criterion does to a human (non-engineer)" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Expression.name">
      <path value="Expression.name" />
      <short value="name should align with code." />
      <mustSupport value="true" />
    </element>
    <element id="Expression.language">
      <path value="Expression.language" />
      <short value="Provide the language for the criterion" />
      <mustSupport value="true" />
    </element>
    <element id="Expression.expression">
      <path value="Expression.expression" />
      <short value="A measure must describe how to automate the computation in an expression that can be evaluated in the specified language" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
  </differential>
</StructureDefinition>