image/x-cmu-raster             ras              #
image/x-portable-anymap        pnm              #
image/x-portable-bitmap        pbm              #
image/x-portable-graymap       pgm              #
image/x-portable-pixmap        ppm              #
image/x-rgb                    rgb              # RGB Image File
image/x-xbitmap                xbm              # X-bitmap Image File

      </match>
    </magic>
    <glob pattern="*.pbm"/>
  </mime-type>

  <mime-type type="image/x-portable-graymap">
    <sub-class-of type="image/x-portable-anymap"/>
    <acronym>PGM</acronym>
    <_comment>Portable Graymap Graphic</_comment>
    <magic priority="50">
      <match value="P2" type="string" offset="0">
        <match value="\x0a" type="string" offset="2"/>