[1]
[CITE@en[Chameleon schemas considerd harmful]] ([[Elliotte Harold]] 著, [CODE[2007-01-02 23:13:28 +09:00]] 版) <http://lists.w3.org/Archives/Public/www-forms-editor/2007Jan/0000.html>
([[名無しさん]])

[2]
[CITE@en[Re: Chameleon schema considered harmful]] ([[John Boyer]] 著, [CODE[2006-11-02 09:27:29 +09:00]] 版) <http://lists.w3.org/Archives/Public/www-forms-editor/2006Nov/0000.html>
([[名無しさん]])

[3]
[CITE@en[Chameleon schema considered harmful]] ([[Elliotte Harold]] 著, [CODE[2006-10-26 05:19:39 +09:00]] 版) <http://lists.w3.org/Archives/Public/www-forms-editor/2006Oct/0001.html>
([[名無しさん]])

[4]
[CITE[W3C XML Schema: やるべきこと、やってはいけないこと]] ([CODE[2005-06-09 09:08:09 +09:00]] 版) <http://www.horobi.com/xml/XMLSchemaDosAndDONTs.ja.html#avoid_chameleon>
([[名無しさん]])


[5]
[CITE@en[Re: Chameleon schemas considerd harmful]] ([[John Boyer]] 著, [TIME[2007-02-06 04:25:33 +09:00]] 版) <http://lists.w3.org/Archives/Public/www-forms/2007Feb/0021.html>

>On behalf the XForms working group, I am writing to inform you that the 
group elected to remove the chameleon schema feature from the 
specification.


([[名無しさん]] [WEAK[2007-02-09 15:57:33 +00:00]])

[7] [[XForms 1.1]] の項も参照してください。

[6] もうあきらめたのかと思ったら、

[CITE@en[XHTML 2.0 - XForms Module]] ([TIME[2009-01-10 00:05:50 +09:00]] 版) <http://www.w3.org/MarkUp/2009/ED-xhtml2-20090109/mod-xforms.html#s_xformsmodule>

には

>The XForms Module provides a rich collection of forms features within the XHTML namespace.

と書いてある。これって [[XHTML名前空間]]に [[XForms]] の[[要素]]や[[属性]]を持ち込むという意味なのだろうか?

[CITE@en[XHTML 2.0 - XML Events Module]] ([TIME[2009-01-10 00:04:07 +09:00]] 版) <http://www.w3.org/MarkUp/2009/ED-xhtml2-20090109/mod-xml-events.html>

にはもっとはっきり

>As permitted by XML Events 2, this element is incorporated into the XHTML namespace. 

と書いてある。

でも

[CITE@en[XHTML 2.0 - XML Handlers Module]] ([TIME[2009-01-10 00:08:12 +09:00]] 版) <http://www.w3.org/MarkUp/2009/ED-xhtml2-20090109/mod-handler.html>

とか

[CITE@en[XHTML 2.0 - XML Scripting Module]] ([TIME[2009-01-10 00:04:11 +09:00]] 版) <http://www.w3.org/MarkUp/2009/ED-xhtml2-20090109/mod-scripting.html>

にはなぜか何も書いてないね。

[8] [CITE@en-US[Compound Document by Inclusion (CDI) Framework]] ([TIME[2006-10-15 03:19:19 +09:00]] 版) <http://dev.w3.org/2006/cdf/cdi-framework/#importing>

[9] 実際のところ [[Forms WG]] はカメレオンを未だに悪いとも思っていないようで、
[CITE@EN[XForms for HTML]] ([TIME[2008-12-19 10:49:25 +09:00]] 版) <http://www.w3.org/MarkUp/Forms/specs/XForms1.2/XFormsForHTML/index-all.html#intro-reading>
では、
>The XForms for HTML attributes are offered to HTML and XHTML web pages as a set of local attributes. Other consuming host language markup languages may adopt these attributes as global attributes in the XForms namespace (http://www.w3.org/2002/xforms).
>
Host language processors should be, but are not required to be, namespace aware. For clarity, this specification describes integration with explicitly declared XForms elements by using the prefix xf to indicate the XForms namespace (http://www.w3.org/2002/xforms) being applied to those elements. A host language processor may adopt the XForms elements into its own namespace for ease of authoring.

([[HTML]] に追加する[[属性]]は実は [[XForms]] [[名前空間]]の[[属性]]の特例だし、
[[ホスト言語]]の設計者次第で [[XForms]] の[[要素]]を好きな[[名前空間]]に突っ込んでも構わない)
なんてことが述べられています。

[10] [CITE[XHTML Access Module]] ([TIME[2010-12-17 01:48:31 +09:00]] 版) <http://www.w3.org/TR/2010/NOTE-xhtml-access-20101216/#docconf>

[11] >>10 には「この[[モジュール]]自身の[[名前空間]]に取り込まないなら」という適合性の規定があり、
[CODE(XMLe)@en[[[acess]]]] [[要素]]を [[XHTML名前空間]]ではなく、
任意の[[ホスト言語]]の[[名前空間]]で用いることを認めているようです。