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[css2] Added changes/clarifications for chapter 5 (Selectors).
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<html lang="en">
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<!-- $Id: changes.src,v 2.63 2007-07-06 06:08:53 fantasai Exp $ -->
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<!-- $Id: changes.src,v 2.64 2007-07-09 10:39:49 bbos Exp $ -->
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<HEAD>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<TITLE>Changes</TITLE>
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<p>This section changed to say that error handling <em>is</em> specified
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in most cases.</p>
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<!-- Chapter 5 -->
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<h3 id="c5.8.1"><a href="selector.html#q10">Section 5.8.1 Matching
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attributes and attribute values</a></h3>
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<p>RFC&nbsp;3066 replaces RFC&nbsp;1766.
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<h3 id="c5.8.3"><a href="selector.html#class-html">Section 5.8.3 Class
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selectors</a></h3>
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<p>Class selectors are allowed for other formats than HTML.
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<p>Added a note about matching classes in formats with multiple class
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attributes per element. The behavior is non-normative, because, at the
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time of writing, there exist no such formats.
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<h3 id="c5.9"><a href="selector.html#id-selectors">Section 5.9 ID
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selectors</a></h3>
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<p>Specified how to match elements with two or more ID attributes.
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<h3 id="c5.10"><a href="selectors.html#pseudo-elements">Section 5.10
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Pseudo-elements and pseudo-classes</a></h3>
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<p>Removed exception for HTML UAs that allowed them (and only them) to
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ignore ':first-letter' and ':first-line'.
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<h3 id="c5.11.2"><a href="selectors.html#link-pseudo-classes">5.11.2
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The link pseudo-classes: :link and :visited</a></h3>
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<p>UAs may return a :visited link to :link status at some point. (This
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was previously a note, but is now normative.)
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<p>Added a note about privacy concerns with link pseudo classes and
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allowed UAs to treat :visited as :link.
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<h3 id=c5.11.4"><a href="selectors.html#lang">Section 5.11.4 The
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language pseudo-class: :lang</a></h3>
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<p>The identifier C in ':lang(C)' need not be a valid language code,
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but it must not be empty.
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<h3 id="c5.12.1"><a href="selector.html#first-line-pseudo">Section
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5.12.1 The :first-line pseudo-element</a></h3>
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<p>':first-line' also applies to inline blocks, table captions and
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table cells. Added a definition of "first formatted line" to make the
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rules about which line is the first line more precise.
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<p>UAs are no longer forbidden from applying more properties than the
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given list.
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<h3 id="c5.12.2"><a href="selector.html#first-letter">Section 5.12.2
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The :first-letter pseudo-element</a></h3>
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<p>More precise definition of first letter. Added rules for cases
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where the first letter is in an inline block or table cell. Added
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rules for cases when preceding punctuation is in a different element
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from the first letter itself.
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<p>UAs may apply other properties to first letters than the given
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list.
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<p>Unicode character classes Pi and Pf added to the definition of
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punctuation.
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<!-- Chapter 6 -->
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<h3 id="c6.1"><a href="cascade.html#q1">Section 6.1 Specified, computed, and actual values</a></h3>
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<p>Redefined "computed value" and created the concept of "used value"
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to section 4.1.6 on strings, which must have matching single or
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double quotes around them.
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<h3 id="x55"><a href="selector.html#descendant-selectors">Section 5.5</a></h3>
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<p>Near the end of the section, the text 'Note the whitespace on
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either side of the "*"' was misleading. The note was not meant to
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imply that whitespace is required on both sides of the "*" (since the
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grammar does not require it in this case) but that one may use
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whitespace in this case.
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<h3 id="x56"><a href="selector.html#id-selectors">Section 5.9 ID selectors</a></h3>
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<!-- Chapter 5 -->
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<h3 id="r5.1"><a href="selector.html#q1">Section 5.1 Pattern matching</a></h3>
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<p>Added note about terminology change ("simple selector") between
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CSS2 and CSS3.
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<h3 id="r5.7"><a href="selector.html#adjacent-selectors">Section 5.7
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Adjacent sibling selectors</a></h3>
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<p>Clarified that text nodes and comments do not affect whether a
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sibling selector matches.
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<h3 id="r5.8.2"><a href="selector.html#q11">Section 5.8.2 Default
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attribute values in DTDs</a></h3>
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<p>Clarified that rules about default attribute values are the same,
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whether the default is specified in a DTD or by other means.
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<h3 id="r5.9"><a href="selector.html#id-selectors">Section 5.9 ID
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selectors</a></h3>
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<p>Added a note that it depends on the document format which
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attributes are ID attributes.
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<h3 id="r5.11.3"><a
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href="selectors.html#dynamic-pseudo-classes">Section 5.11.3 The
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dynamic pseudo-classes: :hover, :active, and :focus</a></h3>
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<p>Clarified that CSS&nbsp;2.1 does <em>not</em> define if the parent
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of an element that matches ':active' or ':hover' itself also matches
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':active' or ':hover'.
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<p>Added note that, in CSS1, ':active' only applies to links.
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<h3 id=c5.11.4"><a href="selectors.html#lang">Section 5.11.4 The
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language pseudo-class: :lang</a></h3>
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<p>Added a note to show the differences between ':lang(xx)' and
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'[lang=xx]'.
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<h3 id="r5.12.2"><a href="selector.html#first-letter">Section 5.12.2
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The :first-letter pseudo-element</a></h3>
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<p>Clarified that digits can also be first letter.
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<p>The word "precedence" in the last but one paragraph should have been
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"specificity."
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<h3 id="s-5-12-1"><a href="selector.html#first-line-pseudo">Section
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5.12.1 The :first-line pseudo-element</a></h3>
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<p>Added some clarifications at the end of the section about the
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fictional tag sequence in the case of nested block-level elements
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<!-- Chapter 6 -->
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<h3 id="r6.2"><a href="cascade.html#inheritance">Section 6.2 Inheritance</a></h3>
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