<tool id="elapsed_time" name="Elapsed time" version="1.0">
  <description>of each job</description>
  <command interpreter="perl">
    time.pl > $output
  </command>
  <inputs>
  </inputs>
  <outputs>
    <data name="output" format="tabular" label="${tool.name} on ${on_string}"/>
  </outputs>
  <help>
  </help>
</tool>