Tuples, what, why, who?

I've been tagging a little while and I have to confess, I don't get the whole Tuple thing...

I tend to just fill in (on IRIS) the heading and the b/f c/f boxes, then if it says a Tuple group is needed I let it create one.  I suspect this is not how it should be done...

 

Is there some sort of guide I can read?

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Exactly

mrshamilton |