_JPG.XML

<?xml version="1.0"?>
<!DOCTYPE binary_file_format SYSTEM "BinaryFileFormat.dtd">
<binary_file_format name="JPEG_file_interchange_format" default_byte_order="big" default_read_only="false" default_char_set="ascii" web_site="http://www.w3.org/Graphics/JPEG/" allow_editing="false">
  <data type="int" name="SOI" format="unsigned" len="2" domain="this == 0xFFD8" display="hex" comment="Start of information marker"/>
  <struct name="APP0_segment" type_name="" comment="">
    <data type="int" name="marker" format="unsigned" len="2" domain="this == 0xFFE0" display="hex" comment="APP0 marker"/>
    <data type="int" name="length" format="unsigned" len="2" display=""/>
    <data type="string" name="identifier" format="ascii" len="5" domain="this == &quot;JFIF&quot;" display=""/>
    <data type="int" name="version" format="unsigned" len="2" display="hex"/>
    <data type="int" name="units" format="unsigned" len="1" domain="{ NONE, DPI, DPcm }" display=""/>
    <data type="int" name="Xdensity" format="unsigned" len="2" display=""/>
    <data type="int" name="Ydensity" format="unsigned" len="2" display=""/>
    <data type="int" name="Xthumbnail" format="unsigned" len="1" display=""/>
    <data type="int" name="Ythumbnail" format="unsigned" len="1" display=""/>
    <data type="none" name="RGBn" len="3 * Xthumbnail * Ythumbnail"/>
  </struct>
  <for name="segment" count="" stop_test="this.marker == 0xFFD9" type_name="" comment="">
    <struct name="" type_name="" comment="">
      <data type="int" name="marker" format="unsigned" len="2" display="hex" domain="this &gt;= 0xFFC0" comment="This value determines what type of segment follows."/>
      <if test="marker != 0xFFDA &amp;&amp; marker !=0xFFD9" comment="">
        <struct name="Other" type_name="" comment="Other data segments apart from SOS">
          <data type="int" name="length" format="unsigned" len="2" display="" comment="length of the segment (not including marker but including length itself)."/>
          <data type="none" name="rest" len="length - 2"/>
        </struct>
      </if>
      <if test="marker == 0xFFDA" comment="">
        <struct name="SOS" type_name="" comment="Start of scan.  This is the last segment which continues to end of file except for the EOI marker (FFD9) which is included here for simplicity.">
          <data type="int" name="length" format="unsigned" len="2" display="" comment="Scan header length.  Does not include the data length."/>
          <data type="none" name="scan_header" len="length - 2"/>
          <data type="none" name="data" comment="The actual image data.  Continues to EOF (except for terminating EOI marker)."/>
        </struct>
      </if>
    </struct>
  </for>
</binary_file_format>