Specifies the XPath expression, JMS property, or system value that contains the txid used to unique identify transactions. This value must increment for each transaction.

txrule.txid={xpath_expression|$jms_property|*txid}

For most cases using the system value of *txid is preferred.

For example:

dyntxrule.txid=$JMSTxId
dyntxrule.txid=*txid