Publishing Engine Programmer's Guide > The Arbortext Publishing Engine Request Manager > Predefined Dynamic Components > Pre-Defined Queues > Waiting for Transactions on Previous Queues
  
Waiting for Transactions on Previous Queues
You can set the queue parameter previous-queues in e3config.xml to specify one or more queues on which the current queue must wait before executing transactions. The Arbortext Queue will not present transactions to the Queued Transaction Scheduler for execution until the queues in the previous-queues list contain no transactions except those being held. Specify previous-queues by providing a list of queue IDs separated by commas, following the format:
Parameter name="previous-queues" value="queue1,queue2,queue3"
If this parameter is not specified, then there is no previous queue dependency.