xml / json parsers

Hello Zeek world
I’m still very new with the Zeek thing, I want to create a new analyser for the Poct1a protocol, this protocol is base or looks like a XML format. I got most of the analyzer structure in place in my plugin, but I hit the wall with the PDU parsing.
Do you have some examples where I could learn how to parse a XML frame. I have to get multiple fields and then populate in the Log file.

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