Aw: Unicode "no-op" Character?

Marius Spix via Unicode unicode at
Sat Jun 22 19:07:17 CDT 2019

Combining Grapheme Joiner (U+034F) is probably what you want as it is default ignorable and keeps the acute on top of the E. However it nay break languages with di- and trigraphs or complex diacritics.

Best regards


> Gesendet: Samstag, 22. Juni 2019 um 02:14 Uhr
> Von: "Sławomir Osipiuk via Unicode" <unicode at>
> An: unicode at
> Betreff: Unicode "no-op" Character?
> Does Unicode include a character that does nothing at all? I'm talking about
> something that can be used for padding data without affecting interpretation
> of other characters, including combining chars and ligatures. I.e. a
> character that could hypothetically be inserted between a latin E and a
> combining acute and still produce É. The historical description of U+0016
> SYNCHRONOUS IDLE seems like pretty much exactly what I want. It only has one
> slight disadvantage: it doesn't work. All software I've tried displays it as
> an unknown character and it definitely breaks up combinations. And U+0000
> NULL seems even worse.
> I can imagine the answer is that this thing I'm looking for isn't a
> character at all and so should be the business of "a higher-level protocol"
> and not what Unicode was made for. but Unicode does include some odd things
> so I wonder if there is something like that regardless. Can anyone offer any
> suggestions?
> Sławomir Osipiuk

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