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

  <mime-type type="text/x-setext">
    <glob pattern="*.etx"/>
    <sub-class-of type="text/plain"/>
  </mime-type>

  <mime-type type="text/x-stsrc">
    <_comment>Smalltalk source code</_comment>
    <glob pattern="*.st"/>
    <sub-class-of type="text/plain"/>
  </mime-type>

  <mime-type type="text/x-tcl">
    <alias type="application/x-tcl"/>