Hey @SAMSAL - thanks for the detailed reply, and yep you hit the nail on the head ha ha. I've used a few of those links already, and as you said I was close, but not quite there. I grasp the concept, it's just the syntax of everything that was throwing me off. That being said, the JSLT example you posted does seem to make more sense to me also, so that's definitely something I'll look into. I spoke to a guy called Paul Lakus in the NiFi slack channel and he basically gave me almost exactly the same solution that you have posted and so I managed to work out how it was being done, but still a huge learning curve for me heh. Anyway this now seems to be working as intended, which I'm extremely grateful for so thank you for your input and the steer towards JSLT - definitely something to look into. Thanks!!
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