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> For actual choice made later during design flow it could done with > back annotation which may be a little bit complicated or forward > annotate for documentation purpose. Yes but you're avoiding the problem still - to do annotation of *any* type you need to somehow know which gate is which. There needs to be some way of correlating "these pins on the chip which I assigned in layout" with "this symbol in the schematic" and refdes is not unique enough.
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