<sub-class-of type="text/plain"/>
  </mime-type>

  <mime-type type="text/x-tcl">
    <alias type="application/x-tcl"/>
    <_comment>Tcl script</_comment>
    <glob pattern="*.itk"/>
    <glob pattern="*.tcl"/>
    <glob pattern="*.tk"/>
    <sub-class-of type="text/plain"/>
  </mime-type>

  <mime-type type="text/x-tika-text-based-message">