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Re: E[foo*="bar"] selector

From: Bjoern Hoehrmann <derhoermi@gmx.net>
Date: Mon, 01 Sep 2003 04:06:47 +0200
To: fantasai <fantasai@escape.com>
Cc: www-style@w3.org
Message-ID: <3f969e80.135227937@smtp.bjoern.hoehrmann.de>

* fantasai wrote:
>Matt wrote:
>> What if I have an element like this:
>> <a href="?alpha=200&amp;beta=300">blah</a>
>> Which of these selectors should match it?
>> a[href*="alpha=200&amp;beta=300"]
>> a[href*="alpha=200&beta=300"]
>> i.e. Does the CSS selector match the HTML entity, or its replaced character?
>The replaced character. Entity replacement is done during
>parsing, and CSS doesn't care what happens at that stage
>of document processing.

Not quite. CSS does not specify how user agents must process documents.
For example, a conforming user agent does not have to resolve external
entities in a XML document; as entity declarations are typically stored
inside external entities, a user agent might not have read the
declaration for the entity [1]. Matching is undefined in this case. It
could be up to the document language to define this, but XML for example
does not specify the string value of attribute values... This is
probably worse for :contains() where the Candiate Recommendation says

  The textual contents of a given element is determined by the
  concatenation of all PCDATA contained in the element and sub-elements.

but neither the specification nor any of it's references define the term
"PCDATA" and even if you translate it to the #PCDATA keyword in XML 1.0
you do not have an answer whether this considers entity references if
replacement text is available/not available.

[1] of course, this does not apply to e.g. &amp; in XML documents as
    XML processors are required to recognize them without declaration
Received on Sunday, 31 August 2003 22:07:11 UTC

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