<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="07fb18f8-62cf-4e28-b3f6-bd7696e5530f" />
  <meta>
    <lastUpdated value="2021-04-08T14:35:34.711+00:00" />
  </meta>
  <url value="http://example.org/fhir/StructureDefinition/IntraocularPressure" />
  <version value="v1.0" />
  <name value="IntraocularPressure" />
  <status value="draft" />
  <experimental value="false" />
  <date value="2021-04-08" />
  <publisher value="Talkingeyes &amp; More GmbH" />
  <copyright value="Talkingeyes &amp; More GmbH" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Observation" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" />
  <derivation value="constraint" />
  <differential>
    <element id="Observation.identifier">
      <path value="Observation.identifier" />
      <max value="0" />
    </element>
    <element id="Observation.basedOn">
      <path value="Observation.basedOn" />
      <max value="0" />
    </element>
    <element id="Observation.partOf">
      <path value="Observation.partOf" />
      <max value="0" />
    </element>
    <element id="Observation.status">
      <path value="Observation.status" />
      <definition value="The status of the result value.&#xD;&#xA;In our Observation we only use final values." />
    </element>
    <element id="Observation.category">
      <path value="Observation.category" />
      <max value="0" />
    </element>
    <element id="Observation.code.coding">
      <path value="Observation.code.coding" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Observation.code.coding.system">
      <path value="Observation.code.coding.system" />
      <min value="1" />
      <fixedUri value="http://loinc.org" />
    </element>
    <element id="Observation.code.coding.version">
      <path value="Observation.code.coding.version" />
      <min value="1" />
      <fixedString value="Loinc Version 2.69" />
    </element>
    <element id="Observation.code.coding.code">
      <path value="Observation.code.coding.code" />
      <min value="1" />
      <fixedCode value="LP96294-1" />
    </element>
    <element id="Observation.code.coding.display">
      <path value="Observation.code.coding.display" />
      <min value="1" />
      <fixedString value="Intraocular pressure" />
    </element>
    <element id="Observation.code.coding.userSelected">
      <path value="Observation.code.coding.userSelected" />
      <min value="1" />
      <fixedBoolean value="false" />
    </element>
    <element id="Observation.code.text">
      <path value="Observation.code.text" />
      <min value="1" />
      <fixedString value="Intraocular pressure" />
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <max value="0" />
    </element>
    <element id="Observation.focus">
      <path value="Observation.focus" />
      <max value="0" />
    </element>
    <element id="Observation.encounter">
      <path value="Observation.encounter" />
      <max value="0" />
    </element>
    <element id="Observation.effective[x]">
      <path value="Observation.effective[x]" />
      <definition value="The time or time-period the observed value is asserted as being true. For biological subjects - e.g. human patients - this is usually called the &quot;physiologically relevant time&quot;. This is usually either the time of the procedure or of specimen collection, but very often the source of the date/time is not known, only the date/time itself.&#xD;&#xA;&#xD;&#xA;We use ISO 8601 and its equivalent in HL7 DateTime, but specifically we only use the subtype: YYYY-MM-DDThh:mm:ss+zz:zz" />
      <min value="1" />
      <type>
        <code value="dateTime" />
        <profile value="http://hl7.org/fhir/StructureDefinition/dateTime" />
      </type>
    </element>
    <element id="Observation.issued">
      <path value="Observation.issued" />
      <max value="0" />
    </element>
    <element id="Observation.performer">
      <path value="Observation.performer" />
      <max value="0" />
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.value[x].value">
      <path value="Observation.value[x].value" />
      <min value="1" />
    </element>
    <element id="Observation.value[x].comparator">
      <path value="Observation.value[x].comparator" />
      <max value="0" />
    </element>
    <element id="Observation.value[x].unit">
      <path value="Observation.value[x].unit" />
      <min value="1" />
      <fixedString value="mmHg" />
    </element>
    <element id="Observation.value[x].system">
      <path value="Observation.value[x].system" />
      <min value="1" />
      <fixedUri value="https://ucum.org/" />
    </element>
    <element id="Observation.value[x].code">
      <path value="Observation.value[x].code" />
      <definition value="A computer processable form of the unit in some unit representation system.&#xD;&#xA;We always use mm[Hg] (UCUM)." />
      <min value="1" />
      <fixedCode value="mm[Hg]" />
    </element>
    <element id="Observation.dataAbsentReason">
      <path value="Observation.dataAbsentReason" />
      <max value="0" />
    </element>
    <element id="Observation.interpretation">
      <path value="Observation.interpretation" />
      <max value="0" />
    </element>
    <element id="Observation.note">
      <path value="Observation.note" />
      <max value="0" />
    </element>
    <element id="Observation.bodySite">
      <path value="Observation.bodySite" />
      <max value="0" />
    </element>
    <element id="Observation.method">
      <path value="Observation.method" />
      <max value="0" />
    </element>
    <element id="Observation.specimen">
      <path value="Observation.specimen" />
      <max value="0" />
    </element>
    <element id="Observation.device">
      <path value="Observation.device" />
      <min value="1" />
    </element>
    <element id="Observation.device.reference">
      <path value="Observation.device.reference" />
      <max value="0" />
    </element>
    <element id="Observation.device.type">
      <path value="Observation.device.type" />
      <max value="0" />
    </element>
    <element id="Observation.device.identifier">
      <path value="Observation.device.identifier" />
      <min value="1" />
    </element>
    <element id="Observation.device.identifier.use">
      <path value="Observation.device.identifier.use" />
      <max value="0" />
    </element>
    <element id="Observation.device.identifier.type">
      <path value="Observation.device.identifier.type" />
      <max value="0" />
    </element>
    <element id="Observation.device.identifier.system">
      <path value="Observation.device.identifier.system" />
      <max value="0" />
    </element>
    <element id="Observation.device.identifier.value">
      <path value="Observation.device.identifier.value" />
      <definition value="The portion of the identifier typically relevant to the user and which is unique within the context of the system.&#xD;&#xA;We use it for Sensor Device ID." />
      <min value="1" />
    </element>
    <element id="Observation.device.identifier.period">
      <path value="Observation.device.identifier.period" />
      <max value="0" />
    </element>
    <element id="Observation.device.identifier.assigner">
      <path value="Observation.device.identifier.assigner" />
      <max value="0" />
    </element>
    <element id="Observation.device.display">
      <path value="Observation.device.display" />
      <max value="0" />
    </element>
    <element id="Observation.referenceRange">
      <path value="Observation.referenceRange" />
      <max value="0" />
    </element>
    <element id="Observation.hasMember">
      <path value="Observation.hasMember" />
      <max value="0" />
    </element>
    <element id="Observation.derivedFrom">
      <path value="Observation.derivedFrom" />
      <max value="0" />
    </element>
    <element id="Observation.component">
      <path value="Observation.component" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>