EHDS Logical Information Models
0.2.1 - qa-preview

EHDS Logical Information Models, published by Xt-EHR. This guide is not an authorized publication; it is the continuous build for version 0.2.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/Xt-EHR/xt-ehr-common/ and changes regularly. See the Directory of published versions

## Logical Model: EHDSSubstance - XML Profile

Draft as of 2026-02-05

XML representation of the EHDSSubstance logical model.

Raw xml | Download

    <StructureDefinition xmlns="http://hl7.org/fhir">
      <id value="EHDSSubstance"/>
      <text>
        <status value="extensions"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition EHDSSubstance</b></p><table border="0" cellpadding="0" cellspacing="0" style="border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;"><tr style="border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top"><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the element can appear in the instance">Card.</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px; width: 100px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description &amp; Constraints</a><span style="float: right"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64, " alt="doco" style="background-color: inherit"/></a></span></th></tr><tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-EHDSSubstance-definitions.html#EHDSSubstance" title="EHDS refined base model for Substance">EHDSSubstance</a><a name="EHDSSubstance"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R5/types.html#Base">Base</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">Substance model<br/><span style="font-weight:bold">Instances of this logical model can be the target of a Reference</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_datatype.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Data Type" class="hierarchy"/> <a href="StructureDefinition-EHDSSubstance-definitions.html#EHDSSubstance.identifier" title="Unique identifier for the substance. For an instance, an identifier associated with the package/container (usually a label affixed directly).">identifier</a><a name="EHDSSubstance.identifier"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..*</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#Identifier">Identifier</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">Identifier<br/></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_datatype.gif" alt="." style="background-color: white; background-color: inherit" title="Data Type" class="hierarchy"/> <a href="StructureDefinition-EHDSSubstance-definitions.html#EHDSSubstance.code" title="A code (or set of codes) that identify this substance.">code</a><a name="EHDSSubstance.code"> </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="http://hl7.org/fhir/R5/datatypes.html#CodeableConcept">CodeableConcept</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">Code<br class="binding"/><span style="font-weight:bold" title="null" class="binding">Binding Description: </span><span title="null" class="binding"> (</span><a href="http://hl7.org/fhir/R5/terminologies.html#preferred" title="Instances are encouraged to draw from the specified codes for interoperability purposes but are not required to do so to be considered conformant." class="binding">preferred</a><span title="null" class="binding">)</span><span title="null" class="binding">: </span><span title="null" class="binding">SNOMED CT</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-EHDSSubstance-definitions.html#EHDSSubstance.description" title="A description of the substance - its appearance, handling requirements, and other usage notes.">description</a><a name="EHDSSubstance.description"> </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="http://hl7.org/fhir/R5/datatypes.html#string">string</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">Description</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-EHDSSubstance-definitions.html#EHDSSubstance.expiry" title="When the substance is no longer valid to use. ">expiry</a><a name="EHDSSubstance.expiry"> </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#dateTime">dateTime</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">Expiry</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_datatype.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Data Type" class="hierarchy"/> <a href="StructureDefinition-EHDSSubstance-definitions.html#EHDSSubstance.quantity" title="The amount of the substance.">quantity</a><a name="EHDSSubstance.quantity"> </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="http://hl7.org/fhir/R5/datatypes.html#Quantity">Quantity</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">Quantity</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_bck01.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_datatype.gif" alt="." style="background-color: white; background-color: inherit" title="Data Type" class="hierarchy"/> <a href="StructureDefinition-EHDSSubstance-definitions.html#EHDSSubstance.ingredients" title="Composition information about the substance">ingredients</a><a name="EHDSSubstance.ingredients"> </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">Base</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">Ingredients<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_bck010.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_datatype.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Data Type" class="hierarchy"/> <a href="StructureDefinition-EHDSSubstance-definitions.html#EHDSSubstance.ingredients.quantity" title="The amount of the ingredient in the substance - a concentration ratio.">quantity</a><a name="EHDSSubstance.ingredients.quantity"> </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="http://hl7.org/fhir/R5/datatypes.html#Ratio">Ratio</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">Quantity</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_bck000.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_reference.png" alt="." style="background-color: white; background-color: inherit" title="Reference to another Resource" class="hierarchy"/> <a href="StructureDefinition-EHDSSubstance-definitions.html#EHDSSubstance.ingredients.substance" title="Another substance that is a component of this substance.">substance</a><a name="EHDSSubstance.ingredients.substance"> </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/references.html">Reference</a>(<a href="StructureDefinition-EHDSSubstance.html">Substance model</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">Substance</td></tr>
    <tr><td colspan="5" class="hierarchy"><br/><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64, " alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
      </text>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics">
        <valueCode value="can-be-target"/>
      </extension>
      <url
           value="http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSubstance"/>
      <version value="0.2.1"/>
      <name value="EHDSSubstance"/>
      <title value="Substance model"/>
      <status value="draft"/>
      <date value="2026-02-05T13:46:24+00:00"/>
      <publisher value="Xt-EHR"/>
      <contact>
        <name value="Xt-EHR"/>
        <telecom>
          <system value="url"/>
          <value value="http://www.xt-ehr.eu/"/>
        </telecom>
      </contact>
      <description value="EHDS refined base model for Substance"/>
      <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://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSubstance"/>
      <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Base"/>
      <derivation value="specialization"/>
      <snapshot>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
          <valueString value="5.0.0"/>
        </extension>
        <element id="EHDSSubstance">
          <path value="EHDSSubstance"/>
          <short value="Substance model"/>
          <definition value="EHDS refined base model for Substance"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Base"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <isModifier value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="EHDSSubstance.identifier">
          <path value="EHDSSubstance.identifier"/>
          <short value="Identifier"/>
          <definition
                      value="Unique identifier for the substance. For an instance, an identifier associated with the package/container (usually a label affixed directly)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="EHDSSubstance.identifier"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Identifier"/>
          </type>
        </element>
        <element id="EHDSSubstance.code">
          <path value="EHDSSubstance.code"/>
          <short value="Code"/>
          <definition
                      value="A code (or set of codes) that identify this substance."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="EHDSSubstance.code"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="CodeableConcept"/>
          </type>
          <binding>
            <strength value="preferred"/>
            <description value="SNOMED CT"/>
          </binding>
        </element>
        <element id="EHDSSubstance.description">
          <path value="EHDSSubstance.description"/>
          <short value="Description"/>
          <definition
                      value="A description of the substance - its appearance, handling requirements, and other usage notes."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="EHDSSubstance.description"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
        </element>
        <element id="EHDSSubstance.expiry">
          <path value="EHDSSubstance.expiry"/>
          <short value="Expiry"/>
          <definition value="When the substance is no longer valid to use."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="EHDSSubstance.expiry"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="dateTime"/>
          </type>
        </element>
        <element id="EHDSSubstance.quantity">
          <path value="EHDSSubstance.quantity"/>
          <short value="Quantity"/>
          <definition value="The amount of the substance."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="EHDSSubstance.quantity"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Quantity"/>
          </type>
        </element>
        <element id="EHDSSubstance.ingredients">
          <path value="EHDSSubstance.ingredients"/>
          <short value="Ingredients"/>
          <definition value="Composition information about the substance"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="EHDSSubstance.ingredients"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Base"/>
          </type>
        </element>
        <element id="EHDSSubstance.ingredients.quantity">
          <path value="EHDSSubstance.ingredients.quantity"/>
          <short value="Quantity"/>
          <definition
                      value="The amount of the ingredient in the substance - a concentration ratio."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="EHDSSubstance.ingredients.quantity"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Ratio"/>
          </type>
        </element>
        <element id="EHDSSubstance.ingredients.substance">
          <path value="EHDSSubstance.ingredients.substance"/>
          <short value="Substance"/>
          <definition
                      value="Another substance that is a component of this substance."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="EHDSSubstance.ingredients.substance"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSubstance"/>
          </type>
        </element>
      </snapshot>
      <differential>
        <element id="EHDSSubstance">
          <path value="EHDSSubstance"/>
          <short value="Substance model"/>
          <definition value="EHDS refined base model for Substance"/>
        </element>
        <element id="EHDSSubstance.identifier">
          <path value="EHDSSubstance.identifier"/>
          <short value="Identifier"/>
          <definition
                      value="Unique identifier for the substance. For an instance, an identifier associated with the package/container (usually a label affixed directly)."/>
          <min value="0"/>
          <max value="*"/>
          <type>
            <code value="Identifier"/>
          </type>
        </element>
        <element id="EHDSSubstance.code">
          <path value="EHDSSubstance.code"/>
          <short value="Code"/>
          <definition
                      value="A code (or set of codes) that identify this substance."/>
          <min value="0"/>
          <max value="*"/>
          <type>
            <code value="CodeableConcept"/>
          </type>
          <binding>
            <strength value="preferred"/>
            <description value="SNOMED CT"/>
          </binding>
        </element>
        <element id="EHDSSubstance.description">
          <path value="EHDSSubstance.description"/>
          <short value="Description"/>
          <definition
                      value="A description of the substance - its appearance, handling requirements, and other usage notes."/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="string"/>
          </type>
        </element>
        <element id="EHDSSubstance.expiry">
          <path value="EHDSSubstance.expiry"/>
          <short value="Expiry"/>
          <definition value="When the substance is no longer valid to use. "/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="dateTime"/>
          </type>
        </element>
        <element id="EHDSSubstance.quantity">
          <path value="EHDSSubstance.quantity"/>
          <short value="Quantity"/>
          <definition value="The amount of the substance."/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Quantity"/>
          </type>
        </element>
        <element id="EHDSSubstance.ingredients">
          <path value="EHDSSubstance.ingredients"/>
          <short value="Ingredients"/>
          <definition value="Composition information about the substance"/>
          <min value="0"/>
          <max value="*"/>
          <type>
            <code value="Base"/>
          </type>
        </element>
        <element id="EHDSSubstance.ingredients.quantity">
          <path value="EHDSSubstance.ingredients.quantity"/>
          <short value="Quantity"/>
          <definition
                      value="The amount of the ingredient in the substance - a concentration ratio."/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Ratio"/>
          </type>
        </element>
        <element id="EHDSSubstance.ingredients.substance">
          <path value="EHDSSubstance.ingredients.substance"/>
          <short value="Substance"/>
          <definition
                      value="Another substance that is a component of this substance."/>
          <min value="1"/>
          <max value="1"/>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSubstance"/>
          </type>
        </element>
      </differential>
    </StructureDefinition>