<_comment>Ruby source code</_comment>
    <glob pattern="*.rb"/>
    <sub-class-of type="text/plain"/>
  </mime-type>

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

  <mime-type type="text/x-scheme">
    <_comment>Scheme source code</_comment>
    <glob pattern="*.scm"/>