Hi DiapDealer,
You are right, how this is handled is reader specific, but in general this does highlight the impact of using semantics (epub:type) to allow any reader to handle special cases as they see fit.
So if we do decide to add support for popup footnotes (and that is still a big if, and it would come *after* main epub3 support was complete), I think it should only be in PV and only for epub3 and only to show that the correct epub:type attributes are set (IMHO).
In other words, we use Sigil and this feature to nudge epub3 developers to set the correct semantics all throughout their document so that special cases like these can be handled by readers.
How about that idea?
Take care,
KevinH
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