<mime-type type="image/x-portable-bitmap">
    <sub-class-of type="image/x-portable-anymap"/>
    <acronym>PBM</acronym>
    <_comment>Portable Bit Map</_comment>
    <magic priority="50">
      <match value="P1" type="string" offset="0">
        <match value="\x0a" type="string" offset="2"/>
        <match value="\x0d" type="string" offset="2"/>
        <match value="\x20" type="string" offset="2"/>
      </match>