<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="497bb111-629f-45c0-b216-0e8f3a77db73" />
  <text>
    <status value="generated" />
    <div xmlns="http://www.w3.org/1999/xhtml">to do</div>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="normative" />
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version">
    <valueCode value="4.0.0" />
  </extension>
  <url value="http://hl7.org/fhir/StructureDefinition/base64Binary" />
  <version value="4.0.1" />
  <name value="base64Binary" />
  <status value="active" />
  <date value="2019-11-01T09:29:23+11:00" />
  <publisher value="HL7 FHIR Standard" />
  <contact>
    <telecom>
      <system value="url" />
      <value value="http://hl7.org/fhir" />
    </telecom>
  </contact>
  <description value="Base StructureDefinition for base64Binary Type: A stream of bytes" />
  <fhirVersion value="4.0.1" />
  <kind value="primitive-type" />
  <abstract value="false" />
  <type value="base64Binary" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Element" />
  <derivation value="specialization" />
  <differential>
    <element id="base64Binary">
      <path value="base64Binary" />
      <short value="Primitive Type base64Binary" />
      <definition value="A stream of bytes" />
      <comment value="A stream of bytes, base64 encoded" />
      <min value="0" />
      <max value="*" />
    </element>
    <element id="base64Binary.value">
      <path value="base64Binary.value" />
      <representation value="xmlAttr" />
      <short value="Primitive value for base64Binary" />
      <definition value="Primitive value for base64Binary" />
      <min value="0" />
      <max value="1" />
      <type>
        <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
          <valueUrl value="base64Binary" />
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/regex">
          <valueString value="(\s*([0-9a-zA-Z\+/=]){4}\s*)+" />
        </extension>
        <code value="http://hl7.org/fhirpath/System.String" />
      </type>
    </element>
  </differential>
</StructureDefinition>