<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://example.org/fhir/StructureDefinition/PositionExtension" />
  <name value="PositionExtension" />
  <status value="draft" />
  <date value="2017-09-14T18:33:36.018-07:00" />
  <fhirVersion value="3.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="Observation" />
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Extension.extension:x">
      <path value="Extension.extension" />
      <sliceName value="x" />
    </element>
    <element id="Extension.extension:x.url">
      <path value="Extension.extension.url" />
      <fixedUri value="x" />
    </element>
    <element id="Extension.extension:x.value[x]:valueDecimal">
      <path value="Extension.extension.valueDecimal" />
      <sliceName value="valueDecimal" />
      <type>
        <code value="decimal" />
      </type>
    </element>
    <element id="Extension.extension:y">
      <path value="Extension.extension" />
      <sliceName value="y" />
    </element>
    <element id="Extension.extension:y.url">
      <path value="Extension.extension.url" />
      <fixedUri value="y" />
    </element>
    <element id="Extension.extension:y.value[x]:valueDecimal">
      <path value="Extension.extension.valueDecimal" />
      <sliceName value="valueDecimal" />
      <type>
        <code value="decimal" />
      </type>
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="http://example.org/fhir/StructureDefinition/PositionExtension" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>