Another newbie question

Hello!
I've noticed that when some of you translates your conlangs here on the
list, you have a sort of descriptive translation between two languages. I'm
talking about the (often cryptical) text with all the uppercase letters,
strange symbols, etc. It's purpose is (of course) clear to me; it's
explaining which grammar is used, syntax, etc., but I'm not at all familiar
with the method. Anyone that could tell me more about it? Is there a common
standard, or does everyone make up their own abbreviations?

Thanks
/Martin

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