[ilreq] I18N-ISSUE-401: Clarify initial letter requirements and alignment points

r12a has just created a new issue for https://github.com/w3c/ilreq:

== I18N-ISSUE-401: Clarify initial letter requirements and alignment 
points ==
[moving here from tracker]

http://www.w3.org/TR/2014/WD-ilreq-20141216/#first-letter
5.1 First Letter

This issue attempts to summarise various questions related to the 
First Letter section, which needs some clarification about 
requirements for positioning of highlighted 'initial letters'.

It currently says "in Devanagari the hanging baseline may be 
preferred".

This wording implies that in other cases the hanging baseline may not 
be preferred. If so, and if this refers to drop intial letters, what 
are the alternatives, and what are the font metrics or other 
considerations involved in alignment?

Are sunken and raised initial letters required, in addition to the 
drop initial? If so, what are the alignment points to be used for 
those?

See also Dave Cramer's email request 
(http://lists.w3.org/Archives/Public/public-i18n-indic/2014OctDec/0038.html)
--
I'm working on the CSS Line Layout specification [1], which covers
drop caps and other initial letter effects. I was very happy to see
examples of this in the Indic Layout Requirements document [2].

Can you clarify the bottom alignment point of the initial letter? The
text mentions the text-after-edge, but the illustrations are not
completely clear to me. Is there something in the font metrics that
would define this?

[1] http://dev.w3.org/csswg/css-inline/
[2] http://www.w3.org/TR/2014/WD-ilreq-20141216/#first-letter
--

The text "the primary connection point connects the text-after-edge of
 the initial letter with the text-after-edge of the nth line, but the 
secondary connection point connects the hanging baselines of the 
initial letter and the initial line" isn't very clear, and doesn't 
seem to clearly relate to what is shown in the pictures.

It will probably help to look through 
http://dev.w3.org/csswg/css-inline/#initial-letter-styling section 2, 
to get ideas for the topics to cover in ilreq. It would be good to 
note which requirements are *and* are not relevant to indic scripts, 
and what differences need to be taking into account in the way initial
 letters are positioned. (For example, is the formula at 
http://dev.w3.org/csswg/css-inline/#sizing-initial-letters relevant?)

See https://github.com/w3c/ilreq/issues/1

Received on Wednesday, 16 September 2015 07:00:57 UTC