[rules-users] how to loop back in bpmn process

Hi All, I'm trying to write a flow which will loop back (go back to particular node on a condition and start executing nodes from there) on passing a certain validation. I'm confused on how exactly to achieve this. I'm using an OR gateway to split and using XOR to join them back. But the problem is XOR expects always atleast one branch to be true which is not necessarily true here and, if I use AND both should be true which again is not valid here. Can someone suggest a way to achieve this behaviour. Thanks in advance. -- cheers Sumatheja Dasararaju