What constitute? an abstract character?

[Fuqiao Xue]

Hi Corentin,

The term "abstract character" is ambiguous and can have multiple
definitions. Depending on what you need, It can refer to visual (i.e.,
grapheme), logical (i.e., code point), or byte-level (i.e., code unit)
representation of a given piece of text.

FYI - W3C developed a Character Model document, which includes some
guidelines on "characters" and may be useful to you:
https://www.w3.org/TR/charmod/

Cheers,

Fuqiao

2020年6月15日(月) 8:01 Corentin via Unicode <unicode at unicode.org>:
>
> Hello
> While trying to define suitable semantic for the lexing of C++, we seem to fail to agree on the definition of abstract characters
>
> Notably:
> - Would diatrics marks considered in isolation be considered abstract characters?
> - What about Hangul Jamos and other marks that are not found in isolation in their respective scripts, Variation selectors, etc ?
>
> I guess another way to phrase my question is: does every assigned codepoint represent on its own an abstract character?
>
> My understanding is that is not the case, but I am eager to be enlighten
>
> Thanks,
>
> Corentin