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Re: XHTML M12N: Clarify "ContentType"

From: David Luo <webmaster@brezosoft.com>
Date: Mon, 24 May 2004 09:09:28 +0800
Message-ID: <001b01c4412b$c5b43fa0$39a8f2da@davidloo>
To: <www-html-editor@w3.org>

----- Original Message ----- 
From: "Bjoern Hoehrmann" <derhoermi@gmx.net>
To: <www-html-editor@w3.org>
Sent: Monday, May 24, 2004 2:22 AM
Subject: XHTML M12N: Clarify "ContentType"


> 
> Dear HTML Working Group,
> 
>   Regarding all your specifications that refer to something that is
> referred to using the %ContentType; parameter entity in HTML 4.0
> and subsequent technical reports, what is the lexical space of these
> attributes and how are implementations required to process legal and
> illegal values, are there differences between the attributes that
> have this content model, are there differences between the various
> specifications that refer to this type? Specifically, for the
> following cases, what kind of error, if any, do they constitute and
> how are implementations (which?) required to process them?
> 
>   a) the attribute refers to a type that cannot be found on
>      ftp://ftp.isi.edu/in-notes/iana/assignments/media-types/

>      for example, "application/xhtml+xml"
> 
>   b) the attribute refers to a type that cannot be found on
>      http://www.iana.org/assignments/media-types/

>      for example, "application/ecmascript"
> 
>   c) the attribute refers to an experimental type
>      for example, "text/x-javascript"
> 
>   d) the attribute refers to syntactically illegal type
>      for example (in case this is an illegal type),
>      "björn 2004"
> 
>   e) the attribute refers only to a top level media type as
>      per RFC 2045, for example "image"
> 
>   f) the attribute refers to media type, sub type and a legal
>      parameter, for example
> 
>        'application/xhtml+xml;
>          profile="http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd"'
> 
>   g) as in f) but with an illegal parameter value,
>      for example (in case this is illegal) 
> 
>        'application/xhtml+xml;profile="(ö)"'
> 
>   h) as in f) but with an illegal parameter,
>      for example (in case this is illegal) 
> 
>        'application/xhtml+xml;x=y'
> 
> If parameters are allowed, please further clarify their effect on the
> mechanisms for alternate resources (the "alternate" keyword for the
> rel/rev attributes) like alternate style sheets, and encoding detection,
> for example, if a link refers to a HTML document without encoding
> information and has a type="text/html;charset=utf-8" is the user agent
> required to use this as encoding information when decoding the document?
> Is it, if not required, allowed to do that? What is an implementation
> required to do if there is encoding information for the referenced
> document? If there is a "charset" attribute on the same link, which of
> the specification takes precedence? Is it an error if those contradict?
> 
> regards.
>
>http://www.kmailer.com

>http://www.brezosoft.com

>
Received on Sunday, 23 May 2004 21:08:39 UTC

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