root/galaxy-central/tools/emboss_5/emboss_chaos.xml

<tool id="EMBOSS: chaos7" name="chaos" version="5.0.0">
  <description>Create a chaos game representation plot for a sequence</description>
  <requirements><requirement type="package" version="5.0.0">emboss</requirement></requirements>
  <command interpreter="perl">emboss_single_outputfile_wrapper.pl chaos -sequence $input1 -graph png -goutfile $out_file1 -auto</command>
  <inputs>
    <param format="data" name="input1" type="data">
      <label>On query</label>
    </param>
  </inputs>
  <outputs>
    <data format="png" name="out_file1" />
  </outputs>
<!--    <tests>
    <test>
         puts name of file into the png
    </test>
  </tests> -->
  <help>
    You can view the original documentation here_.
    
    .. _here: http://emboss.sourceforge.net/apps/release/5.0/emboss/apps/chaos.html
  </help>
</tool>