Specifies the name of the JMS property or header field that contains the transaction indicator to be validated against beginval, middleval, endval or wholeval. All operations within a single message will be seen as within one transaction if this property is not set. If it is set it determines the beginning, middle and end of transactions. Transactions defined in this way can span messages. This is an optional property.

delim.txind={field_name|$jms_property}

For example:

delim.txind=txind