OpenEHR Base package
0.1.0 - First Draft International flag

OpenEHR Base package, published by openEHR + HL7. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/openehr-base-ig/ and changes regularly. See the Directory of published versions

Logical Model: DV_PROPORTION - XML Profile

Page standards status: Informative Maturity Level: 3

XML representation of the DV-PROPORTION logical model.

Raw xml | Download


<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="DV-PROPORTION"/>
  <language value="en"/>
  <text>
    <status value="extensions"/>
    <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition DV-PROPORTION</b></p><a name="DV-PROPORTION"> </a><a name="hcDV-PROPORTION"> </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,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" 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_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-DV-PROPORTION-definitions.html#DV_PROPORTION" title="Models a ratio of values, i.e. where the numerator and denominator are both pure numbers. The `_valid_proportion_kind_` property of the `PROPORTION_KIND` class is used to control the type attribute to be one of a defined set.

Used for recording titers (e.g. 1:128), concentration ratios, e.g. Na:K (unitary denominator), albumin:creatinine ratio, and percentages, e.g. red cell distirbution width (RDW). 
 
Misuse: Should not be used to represent things like blood pressure which are often written using a  '/' character, giving the misleading impression that the item is a ratio, when in fact it is a structured value. Similarly, visual acuity, often written as (e.g.) &quot;6/24&quot; in clinical notes is not a ratio but an ordinal (which includes non-numeric symbols like CF = count fingers etc). Should not be used for formulations.">DV_PROPORTION</a><a name="DV_PROPORTION"> </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"><a style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;; padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;" href="http://hl7.org/fhir/R5/conformance-rules.html#constraints" title="This element has or is affected by constraints ( type-validity, precision-validity, is-integral-validity, fraction-validity, unitary-validity, percent-validity, valid-denominator )">C</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">0..*</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="StructureDefinition-DV-AMOUNT.html">DV_AMOUNT</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">Models a ratio of values<br/><br/>Elements defined in Ancestors:<a href="StructureDefinition-BASIC-DEFINITIONS.html" title="Carriage return character.">CR</a>, <a href="StructureDefinition-BASIC-DEFINITIONS.html" title="Line feed character.">LF</a>, <a href="StructureDefinition-OPENEHR-DEFINITIONS.html" title="Predefined terminology identifier to indicate it is local to the knowledge resource in which it occurs, e.g. an archetype">Local_terminology_id</a>, <a href="StructureDefinition-DV-ORDERED.html" title="Optional normal status indicator of value with respect to normal range for this value. Often included by lab, even if the normal range itself is not included. Coded by ordinals in series HHH, HH, H, (nothing), L, LL, LLL; see openEHR terminology group  `normal_status`.">normal_status</a>, <a href="StructureDefinition-DV-ORDERED.html" title="Optional normal range.">normal_range</a>, <a href="StructureDefinition-DV-ORDERED.html" title="Optional tagged other reference ranges for this value in its particular measurement context.">other_reference_ranges</a>, <a href="StructureDefinition-DV-QUANTIFIED.html" title="Optional status of magnitude with values: 

* `&quot;=&quot;`   :   magnitude is a point value 
* `&quot;&lt;&quot;`   :   value is &lt; magnitude 
* `&quot;&gt;&quot;`   :   value is &gt; magnitude 
* `&quot;&lt;=&quot;` : value is &lt;= magnitude 
* `&quot;&gt;=&quot;` : value is &gt;= magnitude 
* `&quot;~&quot;`   :   value is approximately magnitude 

If not present, assumed meaning is  `&quot;=&quot;`.">magnitude_status</a>, <a href="StructureDefinition-DV-QUANTIFIED.html" title="Accuracy of measurement. Exact form of expression determined in descendants.">accuracy</a>, <a href="StructureDefinition-DV-AMOUNT.html" title="If `True`, indicates that when this object was created, `_accuracy_` was recorded as a percent value; if `False`, as an absolute quantity value.">accuracy_is_percent</a>, <a href="StructureDefinition-DV-AMOUNT.html" title="Accuracy of measurement, expressed either as a half-range percent value (`_accuracy_is_percent_` = `True`) or a half-range quantity. A value of `0` means that accuracy is 100%, i.e. no error.

A value of `_unknown_accuracy_value_` means that accuracy was not recorded.">accuracy</a><br/><span style="font-weight:bold">Instances of this logical model are not marked to be the target of a Reference</span><br class="constraint"/><span title="null" class="constraint">Constraints: </span><span style="font-weight:bold" title="Type validity" class="constraint">type-validity</span><span title="null" class="constraint">, </span><span style="font-weight:bold" title="Precision validity must satisfy conditional constraints" class="constraint">precision-validity</span><span title="null" class="constraint">, </span><span style="font-weight:bold" title="Is integral validity must satisfy conditional constraints" class="constraint">is-integral-validity</span><span title="null" class="constraint">, </span><span style="font-weight:bold" title="Fraction validity must satisfy conditional constraints" class="constraint">fraction-validity</span><span title="null" class="constraint">, </span><span style="font-weight:bold" title="Unitary validity must satisfy conditional constraints" class="constraint">unitary-validity</span><span title="null" class="constraint">, </span><span style="font-weight:bold" title="Percent validity must satisfy conditional constraints" class="constraint">percent-validity</span><span title="null" class="constraint">, </span><span style="font-weight:bold" title="Valid denominator" class="constraint">valid-denominator</span><br/></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_primitive.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <a href="StructureDefinition-DV-PROPORTION-definitions.html#DV_PROPORTION.numerator" title="Numerator of ratio">numerator</a><a name="DV_PROPORTION.numerator"> </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..1</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 href="http://hl7.org/fhir/R5/datatypes.html#decimal">decimal</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">Numerator of ratio</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_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_primitive.png" alt="." style="background-color: white; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <a href="StructureDefinition-DV-PROPORTION-definitions.html#DV_PROPORTION.denominator" title="Denominator of ratio.">denominator</a><a name="DV_PROPORTION.denominator"> </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..1</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/R5/datatypes.html#decimal">decimal</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">Denominator of ratio.</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_primitive.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <a href="StructureDefinition-DV-PROPORTION-definitions.html#DV_PROPORTION.type" title="Indicates semantic type of proportion, including percent, unitary etc.">type</a><a name="DV_PROPORTION.type"> </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..1</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 href="http://hl7.org/fhir/R5/datatypes.html#integer">integer</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">Indicates semantic type of proportion, including percent, unitary etc.</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_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_primitive.png" alt="." style="background-color: white; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <a href="StructureDefinition-DV-PROPORTION-definitions.html#DV_PROPORTION.precision" title="Precision  to  which  the  `_numerator_` and `_denominator_` values of  the  proportion are expressed, in terms of number  of decimal places. The value 0 implies an integral quantity. The value -1 implies no limit, i.e. any number of decimal places.">precision</a><a name="DV_PROPORTION.precision"> </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">0..1</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/R5/datatypes.html#integer">integer</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">Precision  to  which  the  `_numerator_` and `_denominator_` values of  the  proportion are expressed, in terms of number  of decimal places.</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_resource.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Resource" class="hierarchy"/> <a href="StructureDefinition-DV-PROPORTION-definitions.html#DV_PROPORTION.normal-range" title="Optional normal range.">normal_range</a><a name="DV_PROPORTION.normal-range"> </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">0..1</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 href="StructureDefinition-DV-INTERVAL.html">DV_INTERVAL</a>&lt;http://openehr.org/fhir/StructureDefinition/DV-PROPORTION&gt;</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">Optional normal range.</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_resource.png" alt="." style="background-color: white; background-color: inherit" title="Resource" class="hierarchy"/> <a href="StructureDefinition-DV-PROPORTION-definitions.html#DV_PROPORTION.other-reference-ranges" title="Optional tagged other reference ranges for this value in its particular measurement context.">other_reference_ranges</a><a name="DV_PROPORTION.other-reference-ranges"> </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">0..*</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="StructureDefinition-REFERENCE-RANGE.html">REFERENCE_RANGE</a>&lt;http://openehr.org/fhir/StructureDefinition/DV-PROPORTION&gt;</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">Optional tagged other reference ranges for this value in its particular measurement context.<br/></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,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3goXBCwdPqAP0wAAAldJREFUOMuNk0tIlFEYhp9z/vE2jHkhxXA0zJCMitrUQlq4lnSltEqCFhFG2MJFhIvIFpkEWaTQqjaWZRkp0g26URZkTpbaaOJkDqk10szoODP//7XIMUe0elcfnPd9zsfLOYplGrpRwZaqTtw3K7PtGem7Q6FoidbGgqHVy/HRb669R+56zx7eRV1L31JGxYbBtjKK93cxeqfyQHbehkZbUkK20goELEuIzEd+dHS+qz/Y8PTSif0FnGkbiwcAjHaU1+QWOptFiyCLp/LnKptpqIuXHx6rbR26kJcBX3yLgBfnd7CxwJmflpP2wUg0HIAoUUpZBmKzELGWcN8nAr6Gpu7tLU/CkwAaoKTWRSQyt89Q8w6J+oVQkKnBoblH7V0PPvUOvDYXfopE/SJmALsxnVm6LbkotrUtNowMeIrVrBcBpaMmdS0j9df7abpSuy7HWehwJdt1lhVwi/J58U5beXGAF6c3UXLycw1wdFklArBn87xdh0ZsZtArghBdAA3+OEDVubG4UEzP6x1FOWneHh2VDAHBAt80IbdXDcesNoCvs3E5AFyNSU5nbrDPZpcUEQQTFZiEVx+51fxMhhyJEAgvlriadIJZZksRuwBYMOPBbO3hePVVqgEJhFeUuFLhIPkRP6BQLIBrmMenujm/3g4zc398awIe90Zb5A1vREALqneMcYgP/xVQWlG+Ncu5vgwwlaUNx+3799rfe96u9K0JSDXcOzOTJg4B6IgmXfsygc7/Bvg9g9E58/cDVmGIBOP/zT8Bz1zqWqpbXIsd0O9hajXfL6u4BaOS6SeWAAAAAElFTkSuQmCC" alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
  </text>
  <contained>
    <OperationDefinition>
      <id value="magnitude"/>
      <name value="magnitude"/>
      <title value="magnitude"/>
      <status value="active"/>
      <kind value="operation"/>
      <description value="Effective magnitude represented by ratio."/>
      <code value="magnitude"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <contained>
    <OperationDefinition>
      <id value="is-integral"/>
      <name value="is_integral"/>
      <title value="is_integral"/>
      <status value="active"/>
      <kind value="operation"/>
      <description
                   value="True if the `_numerator_` and `_denominator_` values are integers, i.e. if `_precision_` is 0."/>
      <code value="is_integral"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="boolean"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <contained>
    <OperationDefinition>
      <id value="add"/>
      <name value="add"/>
      <title value="add"/>
      <status value="active"/>
      <kind value="operation"/>
      <description value="Sum of two strictly comparable proportions."/>
      <code value="add"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="other"/>
        <use value="in"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <contained>
    <OperationDefinition>
      <id value="subtract"/>
      <name value="subtract"/>
      <title value="subtract"/>
      <status value="active"/>
      <kind value="operation"/>
      <description
                   value="Difference between two strictly comparable proportions."/>
      <code value="subtract"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="other"/>
        <use value="in"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <contained>
    <OperationDefinition>
      <id value="is-equal"/>
      <name value="is_equal"/>
      <title value="is_equal"/>
      <status value="active"/>
      <kind value="operation"/>
      <description
                   value="Return True if this `DV-AMOUNT` is considered equal to `_other_`."/>
      <code value="is_equal"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="other"/>
        <use value="in"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="boolean"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <contained>
    <OperationDefinition>
      <id value="multiply"/>
      <name value="multiply"/>
      <title value="multiply"/>
      <status value="active"/>
      <kind value="operation"/>
      <description value="Product of this Proportion and `_factor_`."/>
      <code value="multiply"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="factor"/>
        <use value="in"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <contained>
    <OperationDefinition>
      <id value="less-than"/>
      <name value="less_than"/>
      <title value="less_than"/>
      <status value="active"/>
      <kind value="operation"/>
      <description
                   value="True if this Proportion is less than  `_other_`. Only valid if `_is_strictly_comparable_to()_` is True."/>
      <code value="less_than"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="other"/>
        <use value="in"/>
        <min value="1"/>
        <max value="1"/>
        <type value="decimal"/>
      </parameter>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="boolean"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <contained>
    <OperationDefinition>
      <id value="is-strictly-comparable-to"/>
      <name value="is_strictly_comparable_to"/>
      <title value="is_strictly_comparable_to"/>
      <status value="active"/>
      <kind value="operation"/>
      <description
                   value="Return True if the `_type_` of this proportion is the same as the `_type_` of `_other_`."/>
      <code value="is_strictly_comparable_to"/>
      <system value="false"/>
      <type value="false"/>
      <instance value="true"/>
      <parameter>
        <name value="other"/>
        <use value="in"/>
        <min value="1"/>
        <max value="1"/>
        <type value="Parameters"/>
      </parameter>
      <parameter>
        <name value="return"/>
        <use value="out"/>
        <min value="1"/>
        <max value="1"/>
        <type value="boolean"/>
      </parameter>
    </OperationDefinition>
  </contained>
  <extension url="http://hl7.org/fhir/StructureDefinition/web-source">
    <valueUrl
              value="https://specifications.openehr.org/releases/RM/Release-1.1.0/data_types.html#_dv_proportion_class"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#magnitude"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#is-integral"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#add"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#subtract"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#is-equal"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#multiply"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#less-than"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-operation">
    <valueCanonical value="#is-strictly-comparable-to"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics">
    <valueCode value="has-range"/>
  </extension>
  <extension url="http://hl7.org/fhir/tools/StructureDefinition/view-hint">
    <valueCode value="element-view-as-leaf"/>
  </extension>
  <extension url="http://hl7.org/fhir/tools/StructureDefinition/view-hint">
    <valueCode value="element-view-defns-parent"/>
  </extension>
  <extension url="http://hl7.org/fhir/tools/StructureDefinition/view-hint">
    <valueCode value="element-view-replace-cardinality"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="3">
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
        <valueCanonical
                        value="http://openehr.org/fhir/ImplementationGuide/openehr.base"/>
      </extension>
    </valueInteger>
  </extension>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="informative">
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
        <valueCanonical
                        value="http://openehr.org/fhir/ImplementationGuide/openehr.base"/>
      </extension>
    </valueCode>
  </extension>
  <url value="http://openehr.org/fhir/StructureDefinition/DV_PROPORTION"/>
  <version value="0.1.0"/>
  <name value="DV_PROPORTION"/>
  <title value="DV_PROPORTION"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2025-09-06T15:35:39+10:00"/>
  <publisher value="openEHR + HL7"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://www.openehr.org"/>
    </telecom>
  </contact>
  <description
               value="Models a ratio of values, i.e. where the numerator and denominator are both pure numbers. The `_valid_proportion_kind_` property of the `PROPORTION_KIND` class is used to control the type attribute to be one of a defined set.

Used for recording titers (e.g. 1:128), concentration ratios, e.g. Na:K (unitary denominator), albumin:creatinine ratio, and percentages, e.g. red cell distirbution width (RDW). 
 
Misuse: Should not be used to represent things like blood pressure which are often written using a  '/' character, giving the misleading impression that the item is a ratio, when in fact it is a structured value. Similarly, visual acuity, often written as (e.g.) &quot;6/24&quot; in clinical notes is not a ratio but an ordinal (which includes non-numeric symbols like CF = count fingers etc). Should not be used for formulations."/>
  <jurisdiction>
    <coding>
      <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
      <code value="001"/>
    </coding>
  </jurisdiction>
  <fhirVersion value="5.0.0"/>
  <mapping>
    <identity value="rim"/>
    <uri value="http://hl7.org/v3"/>
    <name value="RIM Mapping"/>
  </mapping>
  <kind value="logical"/>
  <abstract value="false"/>
  <type value="http://openehr.org/fhir/StructureDefinition/DV_PROPORTION"/>
  <baseDefinition
                  value="http://openehr.org/fhir/StructureDefinition/DV_AMOUNT"/>
  <derivation value="specialization"/>
  <snapshot>
    <extension
               url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
      <valueString value="0.1.0"/>
    </extension>
    <element id="DV_PROPORTION">
      <path value="DV_PROPORTION"/>
      <short value="Models a ratio of values"/>
      <definition
                  value="Models a ratio of values, i.e. where the numerator and denominator are both pure numbers. The `_valid_proportion_kind_` property of the `PROPORTION_KIND` class is used to control the type attribute to be one of a defined set.

Used for recording titers (e.g. 1:128), concentration ratios, e.g. Na:K (unitary denominator), albumin:creatinine ratio, and percentages, e.g. red cell distirbution width (RDW). 
 
Misuse: Should not be used to represent things like blood pressure which are often written using a  '/' character, giving the misleading impression that the item is a ratio, when in fact it is a structured value. Similarly, visual acuity, often written as (e.g.) &quot;6/24&quot; in clinical notes is not a ratio but an ordinal (which includes non-numeric symbols like CF = count fingers etc). Should not be used for formulations."/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Base"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <constraint>
        <key value="other-reference-ranges-validity"/>
        <severity value="error"/>
        <human value="Other reference ranges validity must be present"/>
        <expression
                    value="other_reference_ranges.exists() implies other_reference_ranges.empty().not()"/>
        <source
                value="http://openehr.org/fhir/StructureDefinition/DV_ORDERED"/>
      </constraint>
      <constraint>
        <key value="is-simple-validity"/>
        <severity value="error"/>
        <human
               value="Is simple validity must satisfy conditional constraints"/>
        <expression
                    value="(normal_range .empty() and other_reference_ranges .empty()) implies is_simple()"/>
        <source
                value="http://openehr.org/fhir/StructureDefinition/DV_ORDERED"/>
      </constraint>
      <constraint>
        <key value="normal-range-and-status-consistency"/>
        <severity value="error"/>
        <human value="Normal range and status consistency must be present"/>
        <expression
                    value="(normal_range.exists() and normal_status.exists()) implies (normal_status.code_string.is_equal ('N') xor normal_range.not().has (self))"/>
        <source
                value="http://openehr.org/fhir/StructureDefinition/DV_ORDERED"/>
      </constraint>
      <constraint>
        <key value="magnitude-status-valid"/>
        <severity value="error"/>
        <human value="Magnitude status valid must be present"/>
        <expression
                    value="magnitude_status.exists() implies valid_magnitude_status()"/>
        <source
                value="http://openehr.org/fhir/StructureDefinition/DV_QUANTIFIED"/>
      </constraint>
      <constraint>
        <key value="accuracy-is-percent-validity"/>
        <severity value="error"/>
        <human
               value="Accuracy is percent validity must satisfy conditional constraints"/>
        <expression value="accuracy = 0 implies accuracy_is_percent.not()"/>
        <source
                value="http://openehr.org/fhir/StructureDefinition/DV_AMOUNT"/>
      </constraint>
      <constraint>
        <key value="accuracy-validity"/>
        <severity value="error"/>
        <human
               value="Accuracy validity must satisfy conditional constraints"/>
        <expression value="accuracy_is_percent implies valid_percentage()"/>
        <source
                value="http://openehr.org/fhir/StructureDefinition/DV_AMOUNT"/>
      </constraint>
      <constraint>
        <key value="type-validity"/>
        <severity value="error"/>
        <human value="Type validity"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <constraint>
        <key value="precision-validity"/>
        <severity value="error"/>
        <human
               value="Precision validity must satisfy conditional constraints"/>
        <expression value="precision = 0 implies is_integral()"/>
      </constraint>
      <constraint>
        <key value="is-integral-validity"/>
        <severity value="error"/>
        <human
               value="Is integral validity must satisfy conditional constraints"/>
        <expression
                    value="is_integral() implies (numerator.floor = numerator and denominator.floor = denominator)"/>
      </constraint>
      <constraint>
        <key value="fraction-validity"/>
        <severity value="error"/>
        <human
               value="Fraction validity must satisfy conditional constraints"/>
        <expression
                    value="(type = pk_fraction or type = pk_integer_fraction) implies is_integral()"/>
      </constraint>
      <constraint>
        <key value="unitary-validity"/>
        <severity value="error"/>
        <human value="Unitary validity must satisfy conditional constraints"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <constraint>
        <key value="percent-validity"/>
        <severity value="error"/>
        <human value="Percent validity must satisfy conditional constraints"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <constraint>
        <key value="valid-denominator"/>
        <severity value="error"/>
        <human value="Valid denominator"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <isModifier value="false"/>
      <mapping>
        <identity value="rim"/>
        <map value="n/a"/>
      </mapping>
    </element>
    <element id="DV_PROPORTION.CR">
      <path value="DV_PROPORTION.CR"/>
      <short value="Carriage return character."/>
      <definition value="Carriage return character."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="BASIC_DEFINITIONS.CR"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.LF">
      <path value="DV_PROPORTION.LF"/>
      <short value="Line feed character."/>
      <definition value="Line feed character."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="BASIC_DEFINITIONS.LF"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.Local-terminology-id">
      <path value="DV_PROPORTION.Local_terminology_id"/>
      <short value="Predefined terminology identifier"/>
      <definition
                  value="Predefined terminology identifier to indicate it is local to the knowledge resource in which it occurs, e.g. an archetype"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="OPENEHR_DEFINITIONS.Local_terminology_id"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.normal-status">
      <path value="DV_PROPORTION.normal_status"/>
      <short
             value="Optional normal status indicator of value with respect to normal range for this value."/>
      <definition
                  value="Optional normal status indicator of value with respect to normal range for this value. Often included by lab, even if the normal range itself is not included. Coded by ordinals in series HHH, HH, H, (nothing), L, LL, LLL; see openEHR terminology group  `normal_status`."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DV_ORDERED.normal_status"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code
              value="http://openehr.org/fhir/StructureDefinition/CODE_PHRASE"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.normal-range">
      <path value="DV_PROPORTION.normal_range"/>
      <short value="Optional normal range."/>
      <definition value="Optional normal range."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DV_ORDERED.normal_range"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/type-parameter">
          <extension url="name">
            <valueCode value="T"/>
          </extension>
          <extension url="type">
            <valueUri
                      value="http://openehr.org/fhir/StructureDefinition/DV-PROPORTION"/>
          </extension>
        </extension>
        <code
              value="http://openehr.org/fhir/StructureDefinition/DV_INTERVAL"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.other-reference-ranges">
      <path value="DV_PROPORTION.other_reference_ranges"/>
      <short
             value="Optional tagged other reference ranges for this value in its particular measurement context."/>
      <definition
                  value="Optional tagged other reference ranges for this value in its particular measurement context."/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="DV_ORDERED.other_reference_ranges"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/type-parameter">
          <extension url="name">
            <valueCode value="T"/>
          </extension>
          <extension url="type">
            <valueUri
                      value="http://openehr.org/fhir/StructureDefinition/DV-PROPORTION"/>
          </extension>
        </extension>
        <code
              value="http://openehr.org/fhir/StructureDefinition/REFERENCE_RANGE"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.magnitude-status">
      <path value="DV_PROPORTION.magnitude_status"/>
      <short
             value="Optional status of magnitude with values: 

* `&quot;=&quot;`   :   magnitude is a point value 
* `&quot;&lt;&quot;`   :   value is &lt; magnitude 
* `&quot;&gt;&quot;`   :   value is &gt; magnitude 
* `&quot;&lt;=&quot;` : value is &lt;= magnitude 
* `&quot;&gt;=&quot;` : value is &gt;= magnitude 
* `&quot;~&quot;`   :   value is approximately magnitude 

If not present, assumed meaning is  `&quot;=&quot;`."/>
      <definition
                  value="Optional status of magnitude with values: 

* `&quot;=&quot;`   :   magnitude is a point value 
* `&quot;&lt;&quot;`   :   value is &lt; magnitude 
* `&quot;&gt;&quot;`   :   value is &gt; magnitude 
* `&quot;&lt;=&quot;` : value is &lt;= magnitude 
* `&quot;&gt;=&quot;` : value is &gt;= magnitude 
* `&quot;~&quot;`   :   value is approximately magnitude 

If not present, assumed meaning is  `&quot;=&quot;`."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DV_QUANTIFIED.magnitude_status"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.accuracy">
      <path value="DV_PROPORTION.accuracy"/>
      <short
             value="Accuracy of measurement, expressed either as a half-range percent value (`_accuracy_is_percent_` = `True`) or a half-range quantity."/>
      <definition
                  value="Accuracy of measurement, expressed either as a half-range percent value (`_accuracy_is_percent_` = `True`) or a half-range quantity. A value of `0` means that accuracy is 100%, i.e. no error.

A value of `_unknown_accuracy_value_` means that accuracy was not recorded."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DV_QUANTIFIED.accuracy"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="decimal"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.accuracy-is-percent">
      <path value="DV_PROPORTION.accuracy_is_percent"/>
      <short
             value="If `True`, indicates that when this object was created, `_accuracy_` was recorded as a percent value; if `False`, as an absolute quantity value."/>
      <definition
                  value="If `True`, indicates that when this object was created, `_accuracy_` was recorded as a percent value; if `False`, as an absolute quantity value."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DV_AMOUNT.accuracy_is_percent"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="boolean"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.numerator">
      <path value="DV_PROPORTION.numerator"/>
      <short value="Numerator of ratio"/>
      <definition value="Numerator of ratio"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DV_PROPORTION.numerator"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="decimal"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.denominator">
      <path value="DV_PROPORTION.denominator"/>
      <short value="Denominator of ratio."/>
      <definition value="Denominator of ratio."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DV_PROPORTION.denominator"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="decimal"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.type">
      <path value="DV_PROPORTION.type"/>
      <short
             value="Indicates semantic type of proportion, including percent, unitary etc."/>
      <definition
                  value="Indicates semantic type of proportion, including percent, unitary etc."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DV_PROPORTION.type"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="integer"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.precision">
      <path value="DV_PROPORTION.precision"/>
      <short
             value="Precision  to  which  the  `_numerator_` and `_denominator_` values of  the  proportion are expressed, in terms of number  of decimal places."/>
      <definition
                  value="Precision  to  which  the  `_numerator_` and `_denominator_` values of  the  proportion are expressed, in terms of number  of decimal places. The value 0 implies an integral quantity. The value -1 implies no limit, i.e. any number of decimal places."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DV_PROPORTION.precision"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="integer"/>
      </type>
      <isModifier value="false"/>
    </element>
  </snapshot>
  <differential>
    <element id="DV_PROPORTION">
      <path value="DV_PROPORTION"/>
      <short value="Models a ratio of values"/>
      <definition
                  value="Models a ratio of values, i.e. where the numerator and denominator are both pure numbers. The `_valid_proportion_kind_` property of the `PROPORTION_KIND` class is used to control the type attribute to be one of a defined set.

Used for recording titers (e.g. 1:128), concentration ratios, e.g. Na:K (unitary denominator), albumin:creatinine ratio, and percentages, e.g. red cell distirbution width (RDW). 
 
Misuse: Should not be used to represent things like blood pressure which are often written using a  '/' character, giving the misleading impression that the item is a ratio, when in fact it is a structured value. Similarly, visual acuity, often written as (e.g.) &quot;6/24&quot; in clinical notes is not a ratio but an ordinal (which includes non-numeric symbols like CF = count fingers etc). Should not be used for formulations."/>
      <min value="0"/>
      <max value="*"/>
      <constraint>
        <key value="type-validity"/>
        <severity value="error"/>
        <human value="Type validity"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <constraint>
        <key value="precision-validity"/>
        <severity value="error"/>
        <human
               value="Precision validity must satisfy conditional constraints"/>
        <expression value="precision = 0 implies is_integral()"/>
      </constraint>
      <constraint>
        <key value="is-integral-validity"/>
        <severity value="error"/>
        <human
               value="Is integral validity must satisfy conditional constraints"/>
        <expression
                    value="is_integral() implies (numerator.floor = numerator and denominator.floor = denominator)"/>
      </constraint>
      <constraint>
        <key value="fraction-validity"/>
        <severity value="error"/>
        <human
               value="Fraction validity must satisfy conditional constraints"/>
        <expression
                    value="(type = pk_fraction or type = pk_integer_fraction) implies is_integral()"/>
      </constraint>
      <constraint>
        <key value="unitary-validity"/>
        <severity value="error"/>
        <human value="Unitary validity must satisfy conditional constraints"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <constraint>
        <key value="percent-validity"/>
        <severity value="error"/>
        <human value="Percent validity must satisfy conditional constraints"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <constraint>
        <key value="valid-denominator"/>
        <severity value="error"/>
        <human value="Valid denominator"/>
        <expression value="{} // : manual translation needed"/>
      </constraint>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.numerator">
      <path value="DV_PROPORTION.numerator"/>
      <short value="Numerator of ratio"/>
      <definition value="Numerator of ratio"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="decimal"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.denominator">
      <path value="DV_PROPORTION.denominator"/>
      <short value="Denominator of ratio."/>
      <definition value="Denominator of ratio."/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="decimal"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.type">
      <path value="DV_PROPORTION.type"/>
      <short
             value="Indicates semantic type of proportion, including percent, unitary etc."/>
      <definition
                  value="Indicates semantic type of proportion, including percent, unitary etc."/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="integer"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.precision">
      <path value="DV_PROPORTION.precision"/>
      <short
             value="Precision  to  which  the  `_numerator_` and `_denominator_` values of  the  proportion are expressed, in terms of number  of decimal places."/>
      <definition
                  value="Precision  to  which  the  `_numerator_` and `_denominator_` values of  the  proportion are expressed, in terms of number  of decimal places. The value 0 implies an integral quantity. The value -1 implies no limit, i.e. any number of decimal places."/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="integer"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.normal-range">
      <path value="DV_PROPORTION.normal_range"/>
      <short value="Optional normal range."/>
      <definition value="Optional normal range."/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/type-parameter">
          <extension url="name">
            <valueCode value="T"/>
          </extension>
          <extension url="type">
            <valueUri
                      value="http://openehr.org/fhir/StructureDefinition/DV-PROPORTION"/>
          </extension>
        </extension>
        <code
              value="http://openehr.org/fhir/StructureDefinition/DV_INTERVAL"/>
      </type>
      <isModifier value="false"/>
    </element>
    <element id="DV_PROPORTION.other-reference-ranges">
      <path value="DV_PROPORTION.other_reference_ranges"/>
      <short
             value="Optional tagged other reference ranges for this value in its particular measurement context."/>
      <definition
                  value="Optional tagged other reference ranges for this value in its particular measurement context."/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/type-parameter">
          <extension url="name">
            <valueCode value="T"/>
          </extension>
          <extension url="type">
            <valueUri
                      value="http://openehr.org/fhir/StructureDefinition/DV-PROPORTION"/>
          </extension>
        </extension>
        <code
              value="http://openehr.org/fhir/StructureDefinition/REFERENCE_RANGE"/>
      </type>
      <isModifier value="false"/>
    </element>
  </differential>
</StructureDefinition>