<element id="Patient.contact.id">
            <path value="Patient.contact.id" />
            <representation value="xmlAttr" />
            <short value="Unique id for inter-element referencing" />
            <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." />
            <min value="0" />
            <max value="1" />
            <base>
              <path value="Element.id" />
              <min value="0" />
              <max value="1" />
            </base>
            <!-- Note: special primitive values have a FHIRPath system type. e.g. this is compiler magic (j) -->
            <type>
              <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
                <valueUrl value="id" />
              </extension>
              <code value="http://hl7.org/fhirpath/System.String" />
            </type>
            <isModifier value="false" />
            <isSummary value="false" />
            <mapping>
              <identity value="rim" />
              <map value="n/a" />
            </mapping>
          </element>

 <element id="BackboneElement.id">
            <path value="BackboneElement.id" />
            <representation value="xmlAttr" />
            <short value="Unique id for inter-element referencing" />
            <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." />
            <min value="0" />
            <max value="1" />
            <base>
              <path value="Element.id" />
              <min value="0" />
              <max value="1" />
            </base>
            <!-- Note: special primitive values have a FHIRPath system type. e.g. this is compiler magic (j) -->
            <type>
              <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
                <valueUrl value="string" />
              </extension>
              <code value="http://hl7.org/fhirpath/System.String" />
            </type>
            <isModifier value="false" />
            <isSummary value="false" />
            <mapping>
              <identity value="rim" />
              <map value="n/a" />
            </mapping>
          </element>