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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi Mark,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">+1 to deprecating remaining grandfathered codes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Actually, use of a single extended language range was a conscious decision. Having a list of alternatives would have made the canonicalization algorithm more
complex (among other things, it would mean defining the LPL syntax and how to canonically match it). In the case of a tag or subtag with multiple replacements, some human agency needs to choose the best alternative.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Note that ‘i-default’ was and is a special case. It is apparently not the same as ‘und’, although the meaning is very close. The RFC says:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> 7. The grandfathered tag "i-default" (Default Language) was<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> originally registered according to [<a href="http://tools.ietf.org/html/rfc1766" title=""Tags for the Identification of Languages"">RFC1766</a>] to meet the needs of<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> [<a href="http://tools.ietf.org/html/rfc2277" title=""IETF Policy on Character Sets and Languages"">RFC2277</a>]. It is not used to indicate a specific language, but<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> rather to identify the condition or content used where the<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> language preferences of the user cannot be established…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">And RFC 2277 says:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> Messages in Default Language MUST be understandable by an English-<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> speaking person, since English is the language which, worldwide, the<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> greatest number of people will be able to get adequate help in<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> interpreting when working with computers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> Note that negotiating English is NOT the same as Default Language;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> Default Language is an emergency measure in otherwise unmanageable<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> situations.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> In many cases, using only English text is reasonable; in some cases,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> the English text may be augumented by text in other languages.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I recall John Cowan pointing out this out during the 3066bis discussions, which is why i-default was consciously not deprecated at that time.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Addison<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Ietf-languages [mailto:ietf-languages-bounces@alvestrand.no]
<b>On Behalf Of </b>Mark Davis ??<br>
<b>Sent:</b> Saturday, January 24, 2015 9:22 AM<br>
<b>To:</b> Doug Ewell<br>
<b>Cc:</b> ietf-languages<br>
<b>Subject:</b> Re: Add Likely Subtags first step<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I would be very much in favor of deprecating all of the grandfathered codes, and if supplying preferred values. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">BCP47 says the following. Unfortunately, we used the "extended language range" instead of a language priority list, which would have made it easy. So that means we have to list the alternatives in a comment instead of having them be machine
readable:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<pre><span style="font-size:12.0pt;color:black">The field-body of the 'Preferred-Value' for grandfathered and<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;color:black">redundant tags is an "extended language range" [<a href="https://tools.ietf.org/html/rfc4647" title=""Matching of Language Tags"">RFC4647</a>] and<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;color:black">might consist of more than one subtag.<o:p></o:p></span></pre>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Of these grandfathered codes, then, the following have not been deprecated. I suggest that we deprecate each of them, and supply alternatives where possible (in the description, and for <span style="font-size:10.0pt;font-family:"Arial",sans-serif">zh-min)</span>.
The preferred value for en-GB-oed could use a new variant tag ("oxford"). The preferred value for i-default could be "und".<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">cel-gaulish<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">en-GB-oed<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">i-default<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">i-enochian<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">i-mingo<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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