<xs:simpleType name="referralOutcome">
  <xs:annotation>
    <xs:documentation xml:lang="en">1 = Attained 2 = Not attained 3 = Unknown 99 = Data not collected</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:unsignedInt">
    <xs:enumeration value="1">
      <xs:annotation>
        <xs:documentation xml:lang="en">Attained</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="2">
      <xs:annotation>
        <xs:documentation xml:lang="en">Not attained</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="3">
      <xs:annotation>
        <xs:documentation xml:lang="en">Unknown</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="99">
      <xs:annotation>
        <xs:documentation xml:lang="en">Data not collected</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>