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XPath Expression (Node Element): The defined element and all its sub-elements are collected from the source XML. These elements will be processed as a new XML. If the protocol is XML, the encoding of the new XML file to be processed must be defined.
The CheckBox “Base64 decode received PI message” allows to decode the Base 64 message received from PI, and the CheckBox “Base64 encode broker message” encodes to Base64 the payload before it is published in the Broker.