One thing that I'd definitely do (and you may be doing already) would be
to record details from the actual sign in a note tag. That's not going
to help routers, but it will help future mappers and aid retagging when
at some point in the future we've reached a concensus about how best to
map these things.
Cheers,
Andy
(channelling Sybil Fawlty - specialist subject "the bleeding obvious")
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