Re: [MathML 4] Add rules to map from non-combining to combining accents

>
> Yes we should say something (as it happens TeX also has difficulties
> with combining characters)
>
> somewhere around
>
> https://w3c.github.io/mathml/chapter7.html#chars.comb-chars
>
> I guess is the place to add something.
>
> As you hint I may need to add some extra data to unicode.xml to specify
> which characters are related in this way, I don't think the existing
> Unicode data reliably says which are equivalent combining/non combining
> forms although obviously taking the character name and deleting
> "Combining" gives a first approximation of the mapping.
>
>
> David

Hi David,

Indeed, I would prefer an explicit list for better interoperability. Are
you able to come up with one list, maybe doing the change in the repo of
unicode.xml? For you information, below are the available horizontal
stretchy constructions available in some popular OpenType MATH fonts. I
believe other fonts also only provide constructions for combining
versions of accents.

Latin Modern Math

U+003D
U+0302
U+0303
U+0305
U+0306
U+030C
U+0311
U+032C
U+032D
U+032E
U+032F
U+0330
U+0332
U+0333
U+033F
U+034D
U+20D0
U+20D1
U+20D6
U+20D7
U+20E1
U+20E9
U+20EC
U+20ED
U+20EE
U+20EF
U+2190
U+2192
U+2194
U+219A
U+219B
U+219E
U+21A0
U+21A2
U+21A3
U+21A4
U+21A6
U+21A9
U+21AA
U+21AB
U+21AC
U+21AD
U+21AE
U+21B6
U+21B7
U+21BC
U+21BD
U+21C0
U+21C1
U+21C4
U+21C6
U+21C7
U+21C9
U+21CB
U+21CC
U+21CD
U+21CE
U+21CF
U+21D0
U+21D2
U+21D4
U+21DA
U+21DB
U+21DC
U+21DD
U+21E6
U+21E8
U+21F6
U+2212
U+2261
U+2263
U+23B4
U+23B5
U+23DC
U+23DD
U+23DE
U+23DF
U+23E0
U+23E1
U+27A1
U+2906
U+2907
U+2B04
U+2B05
U+2B0C
U+2B31

STIX Two Math

U+005F
U+0302
U+0303
U+0305
U+030C
U+0330
U+0332
U+203E
U+20D0
U+20D1
U+20D6
U+20D7
U+20EC
U+20ED
U+20EE
U+20EF
U+2190
U+2192
U+2194
U+21A4
U+21A6
U+21A9
U+21AA
U+21BC
U+21BD
U+21C0
U+21C1
U+21D0
U+21D2
U+21D4
U+21DA
U+21DB
U+23B4
U+23B5
U+23DC
U+23DD
U+23DE
U+23DF
U+23E0
U+23E1
U+294E
U+2950
U+295A
U+295B
U+295E
U+295F

-- 
Frédéric Wang - frederic-wang.fr