From: Michael \(michka\) Kaplan (email@example.com)
Date: Sun May 11 2003 - 14:40:13 EDT
From: "Jungshik Shin" <firstname.lastname@example.org>
> Recently I found some fonts have visible glyphs for invisible characters
> (that I _guess_ are supposed to have no visual effect) such as U+2062
> (the glyph for U+2062 is dotted 'x' inside a dotted box). With these
> kind of fonts present, a bit naive(??) approach of searching for glyphs
> in all the fonts on the system would turn the 'invisible' to the visible.
> For instance, the following MathML snippet was rendered with
> a visible glyph (⁢ == U+2062) by Mozilla.
Yes, you mentioned this in your mails from a few days ago....
> My questions are:
> (1) Is a font to blame for having visible glyphs for U+2062 and
> similar characters. I think U+2062 and similar characters are different
> from ZWJ/ZWNJ and other 'control' characters that do have visual effect
> in such context as Indic scripts, Arabic script and expressing authorial
> intent about ligature in Latin and other scripts)
You did not mention specifically what font is doing this, which makes it
hard to claim that a font should be "blamed" for anything. What is/are the
font(s) and where did you get it/them?
> (2) What's the normative (if there's such a thing) rendering behavior
> of a sequence with U+2062-like characters? For instance,
> does '<U+0061><U+2062><U+0062>' have to be rendered exactly the same
> way as 'ab'? Perhaps, it'd better be left up to implementations.
> Some implementations (typographic tradition?) may use different
> kerning(?) or add a very thin space between 'a' and 'b'. Others would
> just treat them identically.
I believe you will find it in the default ignorable list. It should likely
have no visible rendering unless there is some higher level reason for there
to be such -- which gets us back to asking what/where/why/etc.
> (3) Is there any way (IF it's allowed) to express the authorial intent
> to render U+2062-like characters with visible glyphs?
How can others know what is in the mind of people who developed a font
without knowing who they are and for what the font was develoed?
Ignoring the normative/conformance side of the question for a moment -- life
is about dealing with things are they are, right? So any application should
do what it thinks best and if a font works to supplant this then it is up to
the app to either let the font do what it wants to or to keep it from doing
This archive was generated by hypermail 2.1.5 : Sun May 11 2003 - 15:14:13 EDT