config/coder.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE codermap [
<!ELEMENT codermap (coder)*>
  <!ATTLIST codermap xmlns CDATA #FIXED ''>
  <!ELEMENT coder EMPTY>
  <!ATTLIST coder xmlns CDATA #FIXED '' magick NMTOKEN #REQUIRED
    name NMTOKEN #REQUIRED>
]>
<!--
  Associate an image format with the specified coder module.

  ImageMagick has a number of coder modules to support the reading and/or
  writing of an image format (e.g. JPEG). Some coder modules support more
  than one associated image format and the mapping between an associated
  format and its respective coder module is defined in this configuration
  file. For example, the PNG coder module not only supports the PNG image
  format, but the JNG and MNG formats as well.
-->
<codermap>
  <!-- <coder magick="GIF87" name="GIF"/> -->
  <!-- <coder magick="JPG" name="JPEG"/> -->
  <!-- <coder magick="PGM" name="PNM"/> -->
</codermap>