
From randy_presuhn@mindspring.com  Mon Oct 19 11:06:06 2009
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From: "Randy Presuhn" <randy_presuhn@mindspring.com>
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Subject: [Ltru] Fw: [rt.amsl.com #20489] ltru WG milestone completion
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Hi -

An update.

Randy

----- Original Message ----- 
> From: "Cindy Morgan via RT" <iesg-secretary@ietf.org>
> To: <randy_presuhn@mindspring.com>
> Sent: Monday, October 19, 2009 11:05 AM
> Subject: [rt.amsl.com #20489] ltru WG milestone completion 
>
> Hi Randy,
> 
> These milestones have been marked as completed on the LTRU WG charter
> page, as requested.
> 
> Best regards,
> Cindy
> 
> 
> On Fri Oct 16 22:01:25 2009, randy_presuhn@mindspring.com wrote:
> > Hi -
> > 
> > Two milestones from the ltru WG charter have been completed:
> > 
> > Mar 2008    Submit registry procedure update draft for IETF Last Call  
> > Mar 2008    Submit registry data update draft for IETF Last Call  
> > 
> > In each case, the IESG last call announcement went out on April 9th, 2009.
> > 
> > Randy Presuhn
> > ltru co-chair
> > 
> 
> 
> 


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Subject: Re: [Ltru] font features in CSS
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Hello Adam,

[cc to IETF LTRU WG]

On 2009/10/30 16:12, Adam Twardoch (List) wrote:

> III. LANGUAGE CLASSIFICATION
>
> All OpenType Layout features are assigned in a context of specific
> script and language system. While the assignment of script is easy (the
> engine can determine from the Unicode string which script a certain
> character belongs to, and from there it can pick the appropriate
> OpenType script branch to apply the features for), the language system
> is trickier.
>
> As you can see from
> http://www.microsoft.com/typography/otspec/languagetags.htm
> OpenType uses a list of language systems that do not have a 1:1
> correspondence with any of the ISO 639 standards. In OpenType 1.6 (at
> the link above), an informational mapping of OpenType language system
> tags and "best matches" in the ISO 639 standards has been provided. It
> is quite obvious that a web browser that applies OpenType Layout
> features should observe the HTML "lang" attribute and, if present, apply
> the appropriate features from the particular language system branch in a
> font (and only if absent, apply the features from the Default language
> system within a script branch). But it might be worth considering to add
> a low-level CSS access mechanism to allow users to choose a specific
> OpenType language system, because some ISO 639 codes can map to several
> OpenType language systems, e.g.
>
>                          (OT)    (ISO)
> Chinese Hong Kong  	ZHH  	zho
> Chinese Phonetic 	ZHP 	zho
> Chinese Simplified 	ZHS 	zho
> Chinese Traditional 	ZHT 	zho

HTML lang and XML xml:lang use BCP 47 (http://tools.ietf.org/html/bcp47, 
formerly RFC 1766/3066/4646) tags, not ISO 639 directly. BCP 47 uses 
two-letter codes (i.e. 'zh') and not three-letter codes (i.e. 'zho') 
when two-letter codes are available. Also, BCP 47 has facilities for 
indicating Region (country,...) with two-letter codes and for indicating 
script with four-letter codes. So the above list should be changed to:

                         (OT)    (BCP 47)
Chinese Hong Kong  	ZHH  	zh-HK
Chinese Phonetic 	ZHP 	**
Chinese Simplified 	ZHS 	zh-Hans
Chinese Traditional 	ZHT 	zh-Hant

** not sure what's meant by Chinese Phonetic, may be zh-Latn (Latin 
transcription) or zh-Bopo (Bopomofo)?

Regards,   Martin.

-- 
#-# Martin J. DÃ¼rst, Professor, Aoyama Gakuin University
#-# http://www.sw.it.aoyama.ac.jp   mailto:duerst@it.aoyama.ac.jp

From mark.edward.davis@gmail.com  Fri Oct 30 07:49:32 2009
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Subject: Re: [Ltru] font features in CSS
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Agreed.

I'm guessing he meant zh-Latn-pinyin

(http://www.iana.org/assignments/language-subtag-registry)

Mark


On Fri, Oct 30, 2009 at 02:29, "Martin J. D=C3=BCrst" <duerst@it.aoyama.ac.=
jp>wrote:

> Hello Adam,
>
> [cc to IETF LTRU WG]
>
> On 2009/10/30 16:12, Adam Twardoch (List) wrote:
>
>  III. LANGUAGE CLASSIFICATION
>>
>> All OpenType Layout features are assigned in a context of specific
>> script and language system. While the assignment of script is easy (the
>> engine can determine from the Unicode string which script a certain
>> character belongs to, and from there it can pick the appropriate
>> OpenType script branch to apply the features for), the language system
>> is trickier.
>>
>> As you can see from
>> http://www.microsoft.com/typography/otspec/languagetags.htm
>> OpenType uses a list of language systems that do not have a 1:1
>> correspondence with any of the ISO 639 standards. In OpenType 1.6 (at
>> the link above), an informational mapping of OpenType language system
>> tags and "best matches" in the ISO 639 standards has been provided. It
>> is quite obvious that a web browser that applies OpenType Layout
>> features should observe the HTML "lang" attribute and, if present, apply
>> the appropriate features from the particular language system branch in a
>> font (and only if absent, apply the features from the Default language
>> system within a script branch). But it might be worth considering to add
>> a low-level CSS access mechanism to allow users to choose a specific
>> OpenType language system, because some ISO 639 codes can map to several
>> OpenType language systems, e.g.
>>
>>                         (OT)    (ISO)
>> Chinese Hong Kong       ZHH     zho
>> Chinese Phonetic        ZHP     zho
>> Chinese Simplified      ZHS     zho
>> Chinese Traditional     ZHT     zho
>>
>
> HTML lang and XML xml:lang use BCP 47 (http://tools.ietf.org/html/bcp47,
> formerly RFC 1766/3066/4646) tags, not ISO 639 directly. BCP 47 uses
> two-letter codes (i.e. 'zh') and not three-letter codes (i.e. 'zho') when
> two-letter codes are available. Also, BCP 47 has facilities for indicatin=
g
> Region (country,...) with two-letter codes and for indicating script with
> four-letter codes. So the above list should be changed to:
>
>                        (OT)    (BCP 47)
> Chinese Hong Kong       ZHH     zh-HK
> Chinese Phonetic        ZHP     **
> Chinese Simplified      ZHS     zh-Hans
> Chinese Traditional     ZHT     zh-Hant
>
> ** not sure what's meant by Chinese Phonetic, may be zh-Latn (Latin
> transcription) or zh-Bopo (Bopomofo)?
>
> Regards,   Martin.
>
> --
> #-# Martin J. D=C3=BCrst, Professor, Aoyama Gakuin University
> #-# http://www.sw.it.aoyama.ac.jp   mailto:duerst@it.aoyama.ac.jp
> _______________________________________________
> Ltru mailing list
> Ltru@ietf.org
> https://www.ietf.org/mailman/listinfo/ltru
>

--001636c5bfb96b59e604772823cd
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Agreed.<br><br>I&#39;m guessing he meant zh-Latn-pinyin<br><br>(<a href=3D"=
http://www.iana.org/assignments/language-subtag-registry">http://www.iana.o=
rg/assignments/language-subtag-registry</a>)<br><br clear=3D"all">Mark<br>
<br><br><div class=3D"gmail_quote">On Fri, Oct 30, 2009 at 02:29, &quot;Mar=
tin J. D=C3=BCrst&quot; <span dir=3D"ltr">&lt;<a href=3D"mailto:duerst@it.a=
oyama.ac.jp">duerst@it.aoyama.ac.jp</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, 204, 204); mar=
gin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello Adam,<br>
<br>
[cc to IETF LTRU WG]<br>
<br>
On 2009/10/30 16:12, Adam Twardoch (List) wrote:<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
III. LANGUAGE CLASSIFICATION<br>
<br>
All OpenType Layout features are assigned in a context of specific<br>
script and language system. While the assignment of script is easy (the<br>
engine can determine from the Unicode string which script a certain<br>
character belongs to, and from there it can pick the appropriate<br>
OpenType script branch to apply the features for), the language system<br>
is trickier.<br>
<br>
As you can see from<br>
<a href=3D"http://www.microsoft.com/typography/otspec/languagetags.htm" tar=
get=3D"_blank">http://www.microsoft.com/typography/otspec/languagetags.htm<=
/a><br>
OpenType uses a list of language systems that do not have a 1:1<br>
correspondence with any of the ISO 639 standards. In OpenType 1.6 (at<br>
the link above), an informational mapping of OpenType language system<br>
tags and &quot;best matches&quot; in the ISO 639 standards has been provide=
d. It<br>
is quite obvious that a web browser that applies OpenType Layout<br>
features should observe the HTML &quot;lang&quot; attribute and, if present=
, apply<br>
the appropriate features from the particular language system branch in a<br=
>
font (and only if absent, apply the features from the Default language<br>
system within a script branch). But it might be worth considering to add<br=
>
a low-level CSS access mechanism to allow users to choose a specific<br>
OpenType language system, because some ISO 639 codes can map to several<br>
OpenType language systems, e.g.<br>
<br>
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 (OT) =C2=A0 =C2=A0(ISO)<br>
Chinese Hong Kong =C2=A0 =C2=A0 =C2=A0 ZHH =C2=A0 =C2=A0 zho<br>
Chinese Phonetic =C2=A0 =C2=A0 =C2=A0 =C2=A0ZHP =C2=A0 =C2=A0 zho<br>
Chinese Simplified =C2=A0 =C2=A0 =C2=A0ZHS =C2=A0 =C2=A0 zho<br>
Chinese Traditional =C2=A0 =C2=A0 ZHT =C2=A0 =C2=A0 zho<br>
</blockquote>
<br>
HTML lang and XML xml:lang use BCP 47 (<a href=3D"http://tools.ietf.org/htm=
l/bcp47" target=3D"_blank">http://tools.ietf.org/html/bcp47</a>, formerly R=
FC 1766/3066/4646) tags, not ISO 639 directly. BCP 47 uses two-letter codes=
 (i.e. &#39;zh&#39;) and not three-letter codes (i.e. &#39;zho&#39;) when t=
wo-letter codes are available. Also, BCP 47 has facilities for indicating R=
egion (country,...) with two-letter codes and for indicating script with fo=
ur-letter codes. So the above list should be changed to:<br>

<br>
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0(OT) =C2=A0 =C2=A0(BCP 47)<br>
Chinese Hong Kong =C2=A0 =C2=A0 =C2=A0 ZHH =C2=A0 =C2=A0 zh-HK<br>
Chinese Phonetic =C2=A0 =C2=A0 =C2=A0 =C2=A0ZHP =C2=A0 =C2=A0 **<br>
Chinese Simplified =C2=A0 =C2=A0 =C2=A0ZHS =C2=A0 =C2=A0 zh-Hans<br>
Chinese Traditional =C2=A0 =C2=A0 ZHT =C2=A0 =C2=A0 zh-Hant<br>
<br>
** not sure what&#39;s meant by Chinese Phonetic, may be zh-Latn (Latin tra=
nscription) or zh-Bopo (Bopomofo)?<br>
<br>
Regards, =C2=A0 Martin.<br><font color=3D"#888888">
<br>
-- <br>
#-# Martin J. D=C3=BCrst, Professor, Aoyama Gakuin University<br>
#-# <a href=3D"http://www.sw.it.aoyama.ac.jp" target=3D"_blank">http://www.=
sw.it.aoyama.ac.jp</a> =C2=A0 mailto:<a href=3D"mailto:duerst@it.aoyama.ac.=
jp" target=3D"_blank">duerst@it.aoyama.ac.jp</a><br>
_______________________________________________<br>
Ltru mailing list<br>
<a href=3D"mailto:Ltru@ietf.org" target=3D"_blank">Ltru@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ltru" target=3D"_blank">ht=
tps://www.ietf.org/mailman/listinfo/ltru</a><br>
</font></blockquote></div><br>

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Subject: [Ltru] Pinyin language?
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I was surprised to see the following; anyone know about it?

%
Type: language
Subtag: pny
Description: Pinyin
Added: 2009-07-29
%

Mark

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I was surprised to see the following; anyone know about it?<br><br>%<br>Type: language<br>Subtag: pny<br>Description: Pinyin<br>Added: 2009-07-29<br>%<br><br clear="all">Mark<br>

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Subject: Re: [Ltru] Pinyin language?
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Mark Davis â?? scripsit:
> I was surprised to see the following; anyone know about it?
> 
> %
> Type: language
> Subtag: pny
> Description: Pinyin
> Added: 2009-07-29
> %

Thus spake the Ethnologue
at http://www.ethnologue.com/show_language.asp?code=pny :

Pinyin
A language of Cameroon

ISO 639-3: pny
Population              24,600 (2001 SIL).
Region                  North West Province, Mezam Division, southwest Bamenda 
                        Subdivision, southwest of Bamenda.
Language map            Southwestern Cameroon, Enlarged Area, reference number 186
Alternate names         Bapinyi, Pelimpo
Dialects                Related to Awing [aal], Ngemba [nge], Bafut [bfd], 
                        Mendankwe-Nkwen [mfd].
Classification          Niger-Congo, Atlantic-Congo, Volta-Congo, Benue-Congo, 
                        Bantoid, Southern, Wide Grassfields, Narrow 
                        Grassfields, Mbam-Nkam, Ngemba
Language development    Literacy rate in L2: 15%-25%.

Coincidences will happen.

-- 
John Cowan   http://ccil.org/~cowan   cowan@ccil.org
'My young friend, if you do not now, immediately and instantly, pull
as hard as ever you can, it is my opinion that your acquaintance in the
large-pattern leather ulster' (and by this he meant the Crocodile) 'will
jerk you into yonder limpid stream before you can say Jack Robinson.'
        --the Bi-Coloured-Python-Rock-Snake

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2009/10/30 "Martin J. D=C3=BCrst" <duerst@it.aoyama.ac.jp>

>
>                         (OT)    (ISO)
>> Chinese Hong Kong       ZHH     zho
>> Chinese Phonetic        ZHP     zho
>> Chinese Simplified      ZHS     zho
>> Chinese Traditional     ZHT     zho
>>
>
>
>
you are comparing apples and oranges ,as the expression goes. The ISO
language codes and BCP47 are about languages.

The table from teh OT spec is NOT a language idfentifier. It identifies wha=
t
the OT spec refers to as a language system. According to the spec:

"Language system tags identify the language systems supported in a OpenType
Layout font. What is meant by a =E2=80=9Clanguage system=E2=80=9D in this c=
ontext is a set
of typographic conventions for how text in a given script should be
presented. Such conventions may be associated with particular languages,
with particular genres of usage, with different publications, and other suc=
h
factors."

The language system tag could map to one language, to multiple languages,
and in unexpected ways. Grouping commonalities in orthographic
representation and typesetting traditions are the core aspect as far as I
can tell, rather than language identification.

At least thats my partial understanding.

Andrew

--=20
Andrew Cunningham
Vicnet Research and Development Coordinator
State Library of Victoria
Australia

andrewc@vicnet.net.au
lang.support@gmail.com

--000e0cd175488bd5ed04772e2e58
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<br><br><div class=3D"gmail_quote">2009/10/30 &quot;Martin J. D=C3=BCrst&qu=
ot; <span dir=3D"ltr">&lt;<a href=3D"mailto:duerst@it.aoyama.ac.jp">duerst@=
it.aoyama.ac.jp</a>&gt;</span><br><blockquote class=3D"gmail_quote" style=
=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; p=
adding-left: 1ex;">
<br><blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(2=
04, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 (OT) =C2=A0 =C2=A0(ISO)<br>
Chinese Hong Kong =C2=A0 =C2=A0 =C2=A0 ZHH =C2=A0 =C2=A0 zho<br>
Chinese Phonetic =C2=A0 =C2=A0 =C2=A0 =C2=A0ZHP =C2=A0 =C2=A0 zho<br>
Chinese Simplified =C2=A0 =C2=A0 =C2=A0ZHS =C2=A0 =C2=A0 zho<br>
Chinese Traditional =C2=A0 =C2=A0 ZHT =C2=A0 =C2=A0 zho<br>
</blockquote><br>
<br clear=3D"all"></blockquote></div><br>you are comparing apples and orang=
es ,as the expression goes. The ISO language codes and BCP47 are about lang=
uages.<br><br>The table from teh OT spec is NOT a language idfentifier. It =
identifies what the OT spec refers to as a language system. According to th=
e spec:<br>
<br>&quot;Language system tags identify the language systems supported in a
OpenType Layout font. What is meant by a =E2=80=9Clanguage system=E2=80=9D =
in this
context is a set of typographic conventions for how text in a given
script should be presented. Such conventions may be associated with
particular languages, with particular genres of usage, with different
publications, and other such factors.&quot;<br><br>The language system tag =
could map to one language, to multiple languages, and in unexpected ways. G=
rouping commonalities in orthographic representation and typesetting tradit=
ions are the core aspect as far as I can tell, rather than language identif=
ication.<br>
<br>At least thats my partial understanding.<br><br>Andrew<br><br>-- <br>An=
drew Cunningham<br>Vicnet Research and Development Coordinator<br>State Lib=
rary of Victoria<br>Australia<br><br><a href=3D"mailto:andrewc@vicnet.net.a=
u">andrewc@vicnet.net.au</a><br>
<a href=3D"mailto:lang.support@gmail.com">lang.support@gmail.com</a><br>

--000e0cd175488bd5ed04772e2e58--

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Thread-Topic: [Ltru] font features in CSS
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From cowan@ccil.org  Fri Oct 30 17:40:57 2009
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Subject: Re: [Ltru] font features in CSS
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Peter Constable scripsit:

> Indeed, the OT language system tags are about typographic
> conventions. Now, many languages have a single conventional writing
> system and a single set of conventions for typography for that
> writing system, though conventions may different for other languages
> with writing systems based on the same script. 

Is the repertoire of characters considered part of the typographic
convention of a language?  Because if so, hardly two languages will
share the same conventions.

-- 
There are three kinds of people in the world:   John Cowan
those who can count,                            cowan@ccil.org
and those who can't.
