<tool id="add_header" name="add_header" version="0.1">
    <description>Add header row to tabular data</description>
    <requirements>
    </requirements>
    <command detect_errors="exit_code"><![CDATA[

      echo $header | sed s/\,/\\t/g  > new_header.txt;
      cat new_header.txt $datatable > output.tab

    ]]></command>
    <inputs>
      <param name="header" type="text" label="List of Column headers (comma delimited, e.g. C1,C2,...)"/>
      <param name="datatable" type="data" format="tabular" label="Data File (tab-delimted)"/>
    </inputs>
    <outputs>
      <data format="tabular" name="Data Table" label="${tool.name} on ${on_string}" from_work_dir="*.tab"/>
    </outputs>

    <help><![CDATA[

    ]]></help>
     <citations>
    </citations>
</tool>