<xs:element name="sex">
  <xs:annotation>
    <xs:documentation xml:lang="en">Specifies the sex of a participant (either of the two major forms of individuals that occur in many species and that are distinguished respectively as female or male especially on the basis of their reproductive organs and structures [https://www.merriam-webster.com/dictionary/sex])</xs:documentation>
    <xs:appinfo>
      <identifier>http://w3id.org/meta-share/meta-share/sex</identifier>
      <label xml:lang="en">sex</label>
      <note xml:lang="en">check with sociologists?</note>
    </xs:appinfo>
  </xs:annotation>
  <xs:simpleType>
    <xs:restriction base="xs:anyURI">
      <xs:enumeration value="http://w3id.org/meta-share/meta-share/female">
        <xs:annotation>
          <xs:appinfo>
            <identifier>http://w3id.org/meta-share/meta-share/female</identifier>
            <label xml:lang="en">female</label>
          </xs:appinfo>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="http://w3id.org/meta-share/meta-share/male">
        <xs:annotation>
          <xs:appinfo>
            <identifier>http://w3id.org/meta-share/meta-share/male</identifier>
            <label xml:lang="en">male</label>
          </xs:appinfo>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="http://w3id.org/meta-share/meta-share/unknown1">
        <xs:annotation>
          <xs:appinfo>
            <identifier>http://w3id.org/meta-share/meta-share/unknown1</identifier>
            <label xml:lang="en">unknown</label>
          </xs:appinfo>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
</xs:element>