Change uploaded file name in Orbeon Forms
<p>When I upload a file in Orbeon I get a progress bar and then a download link with the uploaded filename (for example <code>sample.txt</code>).</p>

<p>Now the scenario is: when I upload any file, I just have to rename the filename based on the reference number (for example <code>12345</code>) in the same form and should be displayed as <code>12345.txt</code>.</p>