<tool id="tab2csv" name="Tabular to CSV" version="0.2">
  <description>converter</description>
  <command interpreter="bash">
    tab2csv.sh $input_file $output_file $dq
  </command>
  <inputs>
    <param name="input_file" type="data" format="tabular" label="File (tabular)"/>
    <param name="dq" type="boolean" truevalue="--double-quotation" falsevalue="" checked="False" label="Double quotation" />
  </inputs>
  <outputs>
    <data name="output_file" format="csv" label="${tool.name} on ${on_string}"/>
  </outputs>
  <help>

**Double quotation**

If this is checked, output is like:

    "aaa","bbb","ccc"

Otherwise:

    aaa,bbb,ccc

  </help>
</tool>