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"A physical file trigger would invoke a process based on data changing in a file with the secondary process not needing to 'wait' or 'poll' for a change in status. A Data Queue can also work well. Waiting on a Data Queue will take no processing time but then the waiting application will instantly 'wake up' when data is placed on the queue and be able to take action. That's two pretty standard approaches. James P. Wiant Test Systems Administrator Foodstuffs (Auckland) Limited P: 09 621 0600 | F: 09 621 0601 |..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://archive.midrange.com/midrange-l/201209/msg00014.html>