<sub-class-of type="message/rfc822"/>
  </mime-type>

  <mime-type type="message/s-http"/>
  <mime-type type="message/sip"/>
  <mime-type type="message/sipfrag"/>
  <mime-type type="message/tracking-status"/>
  <mime-type type="message/vnd.si.simp"/>
  <mime-type type="model/e57">
    <_comment>3d imaging data exchange</_comment>
    <magic priority="60">