John Hudson quoted and wrote:
> >But what should be done when meteg is expected to be in the
> middle? One
> >thought was to encode hataf_vowel - CGJ - meteg, but this is
> not suitable
> >if CGJ is not supposed to promote ligation. Perhaps it is
> better to note
> >that with the hataf vowels the ligature is the default, and
> so expect
> >hataf_vowel - meteg to be rendered as the ligature. Then in
> the relatively
> >few cases where the ligation is not required CGJ can be
> inserted, i.e.
> >hataf_vowel - CGJ - meteg, to suppress the ligation. Is this
> is a valid
> >use of CGJ?
>
> No, this is a valid use of ZWNJ.
>
> This is what currently works:
>
> Left meteg follows vowel (excepting hataf vowel, see below)
>
> Right meteg precedes vowel (including hataf vowel)*
>
> Hataf medial meteg follows vowel but is automatically ligated
> in the font
> lookups (this is the default behaviour because it is the most
> common case)
>
> If you want the meteg to appear to the left of a hataf vowel
> you insert a
> ZWNJ to prevent the ligation: hataf vowel + ZWNJ + meteg
Meteg is a combining character, so you have applied a combining
character to a control character (ZWNJ). While of course "legal", it is
not at all well-defined in Unicode what that should mean. Other,
already defined, uses of ZWNJ always have a base character after
the ZWNJ.
/kent k
