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RE: Reference to "Alphabetic" in 7.17.2 letter-spacing (XSL 1.1 CR)

From: Grosso, Paul <pgrosso@ptc.com>
Date: Thu, 28 Sep 2006 17:59:52 -0400
Message-ID: <CF83BAA719FD2C439D25CBB1C9D1D30204CEF8BC@HQ-MAIL4.ptcnet.ptc.com>
To: "Jeremias Maerki" <dev@jeremias-maerki.ch>, "xsl-editors" <xsl-editors@w3.org>

Jeremias,

Apologies for not having responded for so long.  I had
forwarded this message to the XSL FO SG list immediately,
and we had many internal discussions about this topic,
so I hadn't realized we never responded to you.

Most SG members agree that we should probably fix the
wording here, but there are subtleties involved, and
we don't want to do it hastily.  We are really hoping
to take XSL 1.1 to PR within the week, and since this
issue--as you yourself note--exists in XSL 1.0 also,
we would like to put this off until after we publish
XSL 1.1 and treat this as an erratum (to both XSL 1.0
and 1.1).

Please let me know if you object to our dealing with
this issue as a post-XSL 1.1 erratum.

paul

> -----Original Message-----
> From: xsl-editors-request@w3.org 
> [mailto:xsl-editors-request@w3.org] On Behalf Of Jeremias Maerki
> Sent: Friday, 2006 March 03 04:09
> To: xsl-editors
> Subject: Reference to "Alphabetic" in 7.17.2 letter-spacing 
> (XSL 1.1 CR)
> 
> 
> I've just stumbled over something in the spec. 7.17.2 
> letter-spacing (in
> XSL 1.1 CR, similar in XSL 1.0) mentions that letter-spacing 
> is applied
> in halves before and after every character that is classified as
> "Alphabetic" in the Unicode database. This does not include characters
> like "-" (002D) or "/" (002F). Assume an fo:block which allows for
> letter-spacing that contains the text "XSL-FO". Between "S" 
> and "L", you
> get two half letter-spaces (together 1 letter-space). Between 
> "L" and "-",
> you get only one half letter-space if you strictly follow the 
> spec. This
> is not quite what I would expect and not what various layouters
> currently do (Apache FOP, two commercial FO implementations I checked,
> OpenOffice 2.0 and Word 2003).
> 
> Am I missing something or is this a problem in the spec?
> 
> For quick reference, here's the beginning of the character 
> ranges making
> up "Alphabetic" characters (from DerivedCoreProperties.txt, v4.1.0):
> 
> # Derived Property: Alphabetic
> #  Generated from: Lu+Ll+Lt+Lm+Lo+Nl + Other_Alphabetic
> 
> 0041..005A    ; Alphabetic # L&  [26] LATIN CAPITAL LETTER 
> A..LATIN CAPITAL LETTER Z
> 0061..007A    ; Alphabetic # L&  [26] LATIN SMALL LETTER 
> A..LATIN SMALL LETTER Z
> 00AA          ; Alphabetic # L&       FEMININE ORDINAL INDICATOR
> 00B5          ; Alphabetic # L&       MICRO SIGN
> 00BA          ; Alphabetic # L&       MASCULINE ORDINAL INDICATOR
> 00C0..00D6    ; Alphabetic # L&  [23] LATIN CAPITAL LETTER A 
> WITH GRAVE..LATIN CAPITAL LETTER O WITH DIAERESIS
> 00D8..00F6    ; Alphabetic # L&  [31] LATIN CAPITAL LETTER O 
> WITH STROKE..LATIN SMALL LETTER O WITH DIAERESIS
> 00F8..01BA    ; Alphabetic # L& [195] LATIN SMALL LETTER O 
> WITH STROKE..LATIN SMALL LETTER EZH WITH TAIL
> 
> Thanks,
> Jeremias Maerki
> 
> 
> 
Received on Thursday, 28 September 2006 22:00:12 GMT

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