<job_desc>
    <task>
        <application>worker</application>
        <stdin_filename>stdin</stdin_filename>
        <stdout_filename>stdout</stdout_filename>
        <command_line>10</command_line>
    </task>
    <task>
        <application>worker2</application>
        <stdin_filename>stdin2</stdin_filename>
        <stdout_filename>stdout2</stdout_filename>
        <command_line>10</command_line>
    </task>
</job_desc>