The XML response message must be sent via HTTP v1.1 as UTF-8 encoded XML 1.0 with a single <retransmit> node. This node contains a value of 0 for messages that were successfully received and parsed by the listening application. If an error occurred when the listening application attempted to parse the message, the <retransmit> value should be 1(a value of 1 indicates that the event message should be sent again at the next polling interval):
<?xml version="1.0" encoding="utf-8"?> <retransmit>0</retransmit>