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[Bug 12106] 1. <quote> <!DOCTYPE HTML> </quote> Is this declaration part of an html document? Or is this part of a Document Type Definition (DTD)? Where are DTDs for html documents defined? 2. <title> Resource metadata management </title> <quote> A Document is always

From: <bugzilla@jessica.w3.org>
Date: Fri, 18 Feb 2011 19:15:55 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1PqVo3-00006U-Ml@jessica.w3.org>

Aryeh Gregor <Simetrical+w3cbug@gmail.com> changed:

           What    |Removed                     |Added
                 CC|                            |Simetrical+w3cbug@gmail.com

--- Comment #1 from Aryeh Gregor <Simetrical+w3cbug@gmail.com> 2011-02-18 19:15:55 UTC ---
File one bug per issue, please.  Otherwise it's significantly harder to deal
with.  Although most of these seem to be questions rather than proposed changes

(In reply to comment #0)
> 1.
> <quote>
> </quote>
> Is this declaration part of an html document? Or is this part of a Document
> Type Definition (DTD)? Where are DTDs for html documents defined?


You can only have one doctype, and only at the beginning.  The precise validity
requirements are given implicitly in the text/html parsing section, which is
not for the faint of heart:


In practice, just put one at the beginning and you're fine.  Check in a
validator like validator.nu if you're not sure.

> 2.
> <title>
> Resource metadata management
> </title>
> <quote>
> A Document is always set to one of three modes: no-quirks mode, the default;
> quirks mode, used typically for legacy documents; and limited-quirks mode,
> also known as "almost standards" mode. The mode is only ever changed from the
> default by the HTML parser, based on the presence, absence, or value of the
> DOCTYPE string.
> </quote>
> Where do I define, which of the above modes a document is in?

As it says, the HTML parser decides.  The gist is that if you use a permitted
doctype, like <!doctype html>, you will be in no-quirks mode, which is the mode
you want.  Any valid HTML5 document will be in no-quirks mode.  Other modes
have weird legacy behavior (more than HTML generally does) and are much less
standardized and consistent between browsers, so in practice there's no reason
you want anything but no-quirks mode.

Again, you can refer to the HTML parser if you want the full details, but
that's far too complicated for anyone to be able to understand without
inordinate effort, so it's best to just accept a simplified view.

> 3.
> <title>
> Common infrastructure
> Terminology
> </title>
> <quote>
> This specification refers to both HTML and XML attributes and IDL attributes, 
> </quote>
> Does this specification refers to all three or only to two (both?) of the
> above attribute series? 

All three.

> In the entire document it remains unclear, whether the standard pertains only
> to static html/xhtml (as e.g. sent from a web server) or also to dynamic
> html/xhtml (as e.g. produced by javascript invoked by user interaction).

It applies to all HTML, including HTML that was constructed on the DOM level or
otherwise not derived from a static document.  Conformance checkers don't
normally try to check dynamically-generated pages for conformance, of course.

> User
> Agents, in some cases, behave differently when receiving a text/html document
> from the web server, as opposed to when they execute javascript commands to
> generate dynamically the same content. 
> Are such User Agents not-conforming to this standard?

It depends.  What specific behaviors did you have in mind?

> <title>
> The meta element
> </title>
> <quote>
> The charset attribute specifies the character encoding used by the document.
> This is a character encoding declaration. If the attribute is present in an
> XML document, its value must be an ASCII case-insensitive match for the string
> "UTF-8" (and the document is therefore forced to use UTF-8 as its encoding).
> Note: The charset attribute on the meta element has no effect in XML
> documents, and is only allowed in order to facilitate migration to and from
> </quote>
> Could you please make a statement, that the character encoding of an XML
> attribute is defined by the Document Type Definition (e.g. <?xml version="1.0"
> encoding="utf-8"?>

This is out-of-scope for HTML.  The actual character encoding of an XML
document is defined by XML, not HTML.  HTML only lets you specify <meta
charset> in an XML document because you might want to use the same content for
text/html, where it does matter.

> Regarding the examples:
> I would expect, that in a standard document the examples are reproducible in
> all aspects, so that when I try an example in a User Agent, I get exactly what
> the document says, the example should produce. This is, however, not the case
> in many examples for 
> <title>
> Tabular Data
> </title>
> At least as far as border reproduction is concerned, practically all examples
> fail, i.e. the examples do not show the border as it should according to the
> document. And an example, which makes me first search the error does not help
> very much. 

Which examples don't seem to be working for you, in which browsers?  What looks
wrong about them?

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Received on Friday, 18 February 2011 19:15:57 GMT

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