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Where can I find the official POStags list for Italian?

Please forgive me, I’m a newbie. I’m running languagetool-commandline for Italian (-l it -c utf8 -m it) to extract PoS (-t). I expect the PoS tags to be listed somewhere, like in
LanguageTool-3.4\org\languagetool\resource\it\tagset.txt, but at least NPR is missing. Yes, it means proper noun, but I fear there are other differences.
Thanks for your help!