I'm using PRIS (http driver). I'm able to view my xml files via browser.
I added this config into provisiond-configuration.xml:
<requisition-def import-name="server" import-url-resource="http://localhost:8000/server">
<cron-schedule>* */10 * * * MON-FRI</cron-schedule>
My guess: Every 10 minutes provisiond should import the reqeuisition "server".
Unfortunately it doesn't work like I guessed :-)