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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html lang=
12AE
"en">
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<TITLE>Changes</TITLE>
<link rel="stylesheet" href="style/default.css" type="text/css">
<link rel="stylesheet" href="http://www.w3.org/StyleSheets/TR/W3C-CR.css" type="text/css">
<link rel="prev" href="refs.html">
<link rel="next" href="sample.html">
<link rel="contents" href="cover.html#minitoc">
<link rel="CSS-properties" href="propidx.html" title="properties">
<link rel="index" href="indexlist.html" title="index">
<link rel="first" href="cover.html">
</HEAD>
<BODY>
<div class="navbar">
<p><a href="refs.html">previous</a>
<a href="sample.html">next</a>
<a href="cover.html#minitoc">contents</a>
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</div>
<hr class="navbar">
<H1><a name="q0">Appendix C. Changes</a></H1>
<div class="subtoc">
<p><strong>Contents</strong>
<ul class="toc">
<li class="tocline2"><a href="changes.html#new" class="tocxref">C.1 Additional property values</a>
<ul class="toc">
<li class="tocline3"><a href="changes.html#q2" class="tocxref">C.1.1 Section 4.3.5 Colors</a>
<li class="tocline3"><a href="changes.html#q3" class="tocxref">C.1.2 Section 9.2.4 The 'display' property</a>
<li class="tocline3"><a href="changes.html#q4" class="tocxref">C.1.3 Section 12.2 The 'content' property</a>
<li class="tocline3"><a href="changes.html#q5" class="tocxref">C.1.4 Section 18.1 Cursors: the 'cursor' property</a>
<li class="tocline3"><a href="changes.html#q6" class="tocxref">C.1.5 Section 16.6 Whitespace: the 'white-space' property</a>
</ul>
<li class="tocline2"><a href="changes.html#changes" class="tocxref">C.2 Changes</a>
<ul class="toc">
<li class="tocline3"><a href="changes.html#q8" class="tocxref">C.2.1 Section 1.1 CSS 2.1 vs CSS 2</a>
<li class="tocline3"><a href="changes.html#q9" class="tocxref">C.2.2 Section 1.2 Reading the specification</a>
<li class="tocline3"><a href="changes.html#q10" class="tocxref">C.2.3 Section 1.3 How the specification is organized</a>
<li class="tocline3"><a href="changes.html#q11" class="tocxref">C.2.4 Section 1.4.2.1 Value</a>
<li class="tocline3"><a href="changes.html#q12" class="tocxref">C.2.5 Section 1.4.2.6 Media groups</a>
<li class="tocline3"><a href="changes.html#q13" class="tocxref">C.2.6 Section 1.4.2.7 Computed value</a>
<li class="tocline3"><a href="changes.html#q14" class="tocxref">C.2.7 Section 1.4.4 Notes and examples</a>
<li class="tocline3"><a href="changes.html#q15" class="tocxref">C.2.8 Section 1.5 Acknowledgements</a>
<li class="tocline3"><a href="changes.html#q16" class="tocxref">C.2.9 Section 3.2 Conformance</a>
<li class="tocline3"><a href="changes.html#q17" class="tocxref">C.2.10 Section 3.3 Error Conditions</a>
<li class="tocline3"><a href="changes.html#q18" class="tocxref">C.2.11 Section 6.1 Specified, computed, and actual values</a>
<li class="tocline3"><a href="changes.html#q19" class="tocxref">C.2.12 Section 6.4.1 Cascading order</a>
<li class="tocline3"><a href="changes.html#q20" class="tocxref">C.2.13 Section 6.4.3 Calculating a selector's specificity</a>
<li class="tocline3"><a href="changes.html#q21" class="tocxref">C.2.14 Section 6.4.4 Precedence of non-CSS presentational hints</a>
<li class="tocline3"><a href="changes.html#q22" class="tocxref">C.2.15 a href="box.html#margin-properties">Section 8.3 Margin properties</a>
<li class="tocline3"><a href="changes.html#q23" class="tocxref">C.2.16 Section 8.3.1 Collapsing margins</a>
<li class="tocline3"><a href="changes.html#q24" class="tocxref">C.2.17 Section 8.4 Padding properties</a>
<li class="tocline3"><a href="changes.html#q25" class="tocxref">C.2.18 Section 8.5.2 Border color</a>
<li class="tocline3"><a href="changes.html#q26" class="tocxref">C.2.19 Section 8.5.3 Border style</a>
<li class="tocline3"><a href="changes.html#q27" class="tocxref">C.2.20 Section 8.6 The box model for inline elements in bidirection context</a>
<li class="tocline3"><a href="changes.html#q28" class="tocxref">C.2.21 Chapter 9 Visual formatting model</a>
<li class="tocline3"><a href="changes.html#q29" class="tocxref">C.2.22 Section 10.3.7 Absolutely positioned, non-replaced elements</a>
<li class="tocline3"><a href="changes.html#q30" class="tocxref">C.2.23 Section 10.6.4 Absolutely positioned, non-replaced elements</a>
<li class="tocline3"><a href="changes.html#q31" class="tocxref">C.2.24 Section 11.1.2 Clipping: the 'clip' property</a>
<li class="tocline3"><a href="changes.html#q32" class="tocxref">C.2.25 Section 14.2.1 Background properties</a>
<li class="tocline3"><a href="changes.html#q33" class="tocxref">C.2.26 Section 14.3 Gamma correction</a>
<li class="tocline3"><a href="changes.html#q34" class="tocxref">C.2.27 Chapter 15 Fonts</a>
<li class="tocline3"><a href="changes.html#q35" class="tocxref">C.2.28 Section 15.2 Font matching algorithm</a>
<li class="tocline3"><a href="changes.html#q36" class="tocxref">C.2.29 Section 15.2.2 Font family</a>
<li class="tocline3"><a href="changes.html#q37" class="tocxref">C.2.30 Section 15.5 Small-caps</a>
<li class="tocline3"><a href="changes.html#q38" class="tocxref">C.2.31 Section 15.6 Font boldness</a>
<li class="tocline3"><a href="changes.html#q39" class="tocxref">C.2.32 Section 15.7 Font size</a>
<li class="tocline3"><a href="changes.html#q40" class="tocxref">C.2.33 17.4.1 Caption position and alignment</a>
<li class="tocline3"><a href="changes.html#q41" class="tocxref">C.2.34 17.5.4 Horizontal alignment in a column</a>
<li class="tocline3"><a href="changes.html#q42" class="tocxref">C.2.35 Section 17.6 Borders</a>
<li class="tocline3"><a href="changes.html#q43" class="tocxref">C.2.36 Chapter 12 Generated content, automatic numbering, and lists</a>
<li class="tocline3"><a href="changes.html#q44" class="tocxref">C.2.37 Chapter 13 Paged media</a>
<li class="tocline3"><a href="changes.html#q45" class="tocxref">C.2.38 Chapter 16 Text</a>
<li class="tocline3"><a href="changes.html#q46" class="tocxref">C.2.39 Appendix A. Aural style sheets</a>
<li class="tocline3"><a href="changes.html#q47" class="tocxref">C.2.40 Appendix A Section 5 Pause properties</a>
<li class="tocline3"><a href="changes.html#q48" class="tocxref">C.2.41 Appendix A Section 6 Cue properties</a>
<li class="tocline3"><a href="changes.html#q49" class="tocxref">C.2.42 Other</a>
</ul>
<li class="tocline2"><a href="changes.html#known-errors" class="tocxref">C.3 Errors</a>
<ul class="toc">
<li class="tocline3"><a href="changes.html#q51" class="tocxref">C.3.1 Shorthand properties</a>
<li class="tocline3"><a href="changes.html#q52" class="tocxref">C.3.2 Applies to</a>
<li class="tocline3"><a href="changes.html#q53" class="tocxref">C.3.3 Section 6.4 The cascade</a>
<li class="tocline3"><a href="changes.html#q54" class="tocxref">C.3.4 Section 8.1 Box Dimensions</a>
<li class="tocline3"><a href="changes.html#q55" class="tocxref">C.3.5 14.2 The background</a>
<li class="tocline3"><a href="changes.html#q56" class="tocxref">C.3.6 14.2.1 Background properties</a>
<li class="tocline3"><a href="changes.html#q57" class="tocxref">C.3.7 Section 15.7 Font size</a>
<li class="tocline3"><a href="changes.html#q58" class="tocxref">C.3.8 Section 4.1.1 (and G2)</a>
<li class="tocline3"><a href="changes.html#q59" class="tocxref">C.3.9 4.1.3 Characters and case</a>
<li class="tocline3"><a href="changes.html#q60" class="tocxref">C.3.10 Section 4.3 (Double sign problem)</a>
<li class="tocline3"><a href="changes.html#q61" class="tocxref">C.3.11 Section 4.3.2 Lengths</a>
<li class="tocline3"><a href="changes.html#q62" class="tocxref">C.3.12 Section 4.3.6</a>
<li class="tocline3"><a href="changes.html#q63" class="tocxref">C.3.13 5.10 Pseudo-elements and pseudo-classes</a>
<li class="tocline3"><a href="changes.html#q64" class="tocxref">C.3.14 8.2 Example of margins, padding, and borders</a>
<li class="tocline3"><a href="changes.html#q65" class="tocxref">C.3.15 Section 8.5.2 Border color: 'border-top-color', 'border-right-color', 'border-bottom-color', 'border-left-color', and 'border-color'</a>
<li class="tocline3"><a href="changes.html#q66" class="tocxref">C.3.16 Section 8.4 Padding properties</a>
<li class="tocline3"><a href="changes.html#q67" class="tocxref">C.3.17 8.5.3 Border style</a>
<li class="tocline3"><a href="changes.html#q68" class="tocxref">C.3.18 Section 8.5.4 Border shorthand properties: 'border-top', 'border-bottom', 'border-right', 'border-left', and 'border'</a>
<li class="tocline3"><a href="changes.html#q69" class="tocxref">C.3.19 8.5.4 Border shorthand properties: 'border-top', 'border-bottom', 'border-right', 'border-left', and 'border'</a>
<li class="tocline3"><a href="changes.html#q70" class="tocxref">C.3.20 Section 9.3.1</a>
<li class="tocline3"><a href="changes.html#q71" class="tocxref">C.3.21 Section 9.3.2</a>
<li class="tocline3"><a href="changes.html#q72" class="tocxref">C.3.22 Section 9.4.3</a>
<li class="tocline3"><a href="changes.html#q73" class="tocxref">C.3.23 Section 9.7 Relationships between 'display', 'position', and 'float'</a>
<li class="tocline3"><a href="changes.html#q74" class="tocxref">C.3.24 Section 10.3.2 Inline, replaced elements (and 10.3.4, 10.3.6, and 10.3.8)</a>
<li class="tocline3"><a href="changes.html#q75" class="tocxref">C.3.25 Section 10.3.3</a>
<li class="tocline3"><a href="changes.html#q76" class="tocxref">C.3.26 Section 10.6.2 Inline, replaced elements ... (and 10.6.5)</a>
<li class="tocline3"><a href="changes.html#q77" class="tocxref">C.3.27 Section 10.6.3</a>
<li class="tocline3"><a href="changes.html#q78" class="tocxref">C.3.28 Section 11.1.1</a>
<li class="tocline3"><a href="changes.html#q79" class="tocxref">C.3.29 11.2 Visibility: the 'visibility' property</a>
<li class="tocline3"><a href="changes.html#q80" class="tocxref">C.3.30 12.6.2 Lists</a>
<li class="tocline3"><a href="changes.html#q81" class="tocxref">C.3.31 Section 15.5</a>
<li class="tocline3"><a href="changes.html#q82" class="tocxref">C.3.32 Section 16.6 Whitespace: the 'white-space' property</a>
<li class="tocline3"><a href="changes.html#q83" class="tocxref">C.3.33 Section 17.2 The CSS table model</a>
<li class="tocline3"><a href="changes.html#q84" class="tocxref">C.3.34 17.2.1 Anonymous table objects </a>
<li class="tocline3"><a href="changes.html#q85" class="tocxref">C.3.35 17.5 Visual layout of table contents</a>
<li class="tocline3"><a href="changes.html#q86" class="tocxref">C.3.36 17.5 Visual layout of table contents</a>
<li class="tocline3"><a href="changes.html#q87" class="tocxref">C.3.37 Section 17.5.1 Table layers and transparency</a>
<li class="tocline3"><a href="changes.html#q88" class="tocxref">C.3.38 Section 17.6.1 The separated borders model</a>
<li class="tocline3"><a href="changes.html#q89" class="tocxref">C.3.39 Appendix D.2 Lexical scanner</a>
</ul>
<li class="tocline2"><a href="changes.html#clarifications" class="tocxref">C.4 Clarifications</a>
<ul class="toc">
<li class="tocline3"><a href="changes.html#q91" class="tocxref">C.4.1 2.2 A brief CSS2 tutorial for XML</a>
<li class="tocline3"><a href="changes.html#q92" class="tocxref">C.4.2 Definitions</a>
<li class="tocline3"><a href="changes.html#q93" class="tocxref">C.4.3 Section 4.1.1</a>
<li class="tocline3"><a href="changes.html#q94" class="tocxref">C.4.4 Section 5.5</a>
<li class="tocline3"><a href="changes.html#q95" class="tocxref">C.4.5 Section 5.9 ID selectors</a>
<li class="tocline3"><a href="changes.html#q96" class="tocxref">C.4.6 Section 5.12.1 The :first-line pseudo-element</a>
<li class="tocline3"><a href="changes.html#q97" class="tocxref">C.4.7 Section 6.2 Inheritance</a>
<li class="tocline3"><a href="changes.html#q98" class="tocxref">C.4.8 Section 6.2.1 The 'inherit' value</a>
<li class="tocline3"><a href="changes.html#q99" class="tocxref">C.4.9 Section 6.3 The @import rule</a>
<li class="tocline3"><a href="changes.html#q100" class="tocxref">C.4.10 6.4 The Cascade</a>
<li class="tocline3"><a href="changes.html#q101" class="tocxref">C.4.11 6.4.1 Cascading order</a>
<li class="tocline3"><a href="changes.html#q102" class="tocxref">C.4.12 Section 6.4.3 Calculating a selector's specificity</a>
<li class="tocline3"><a href="changes.html#q103" class="tocxref">C.4.13 Section 7.3 Recognized media types</a>
<li class="tocline3"><a href="changes.html#q104" class="tocxref">C.4.14 Section 8.1 Box dimensions</a>
<li class="tocline3"><a href="changes.html#q105" class="tocxref">C.4.15 Section 8.3 Margin properties</a>
<li class="tocline3"><a href="changes.html#q106" class="tocxref">C.4.16 Section 8.3.1</a>
<li class="tocline3"><a href="changes.html#q107" class="tocxref">C.4.17 Section 8.5.3 Border style</a>
<li class="tocline3"><a href="changes.html#q108" class="tocxref">C.4.18 Section 9.4.2</a>
<li class="tocline3"><a href="changes.html#q109" class="tocxref">C.4.19 Section 9.4.3</a>
<li class="tocline3"><a href="changes.html#q110" class="tocxref">C.4.20 Section 9.10</a>
<li class="tocline3"><a href="changes.html#q111" class="tocxref">C.4.21 10.3.3 Block-level, non-replaced elements in normal flow</a>
<li class="tocline3"><a href="changes.html#q112" class="tocxref">C.4.22 Section 10.5 Content height: the 'height' property</a>
<li class="tocline3"><a href="changes.html#q113" class="tocxref">C.4.23 Section 10.8.1</a>
<li class="tocline3"><a href="changes.html#q114" class="tocxref">C.4.24 Section 11.1</a>
<li class="tocline3"><a href="changes.html#q115" class="tocxref">C.4.25 Section 11.1.1</a>
<li class="tocline3"><a href="changes.html#q116" class="tocxref">C.4.26 Section 11.1.2</a>
<li class="tocline3"><a href="changes.html#q117" class="tocxref">C.4.27 12.1 The :before and :after pseudo-elements</a>
<li class="tocline3"><a href="changes.html#q118" class="tocxref">C.4.28 Section 12.4.2 Inserting quotes with the 'content' property</a>
<li class="tocline3"><a href="changes.html#q119" class="tocxref">C.4.29 Section 14.2 The background</a>
<li class="tocline3"><a href="changes.html#q120" class="tocxref">C.4.30 Section 15.1 Fonts Introduction</a>
<li class="tocline3"><a href="changes.html#q121" class="tocxref">C.4.31 Section 15.2 Font matching algorithm</a>
<li class="tocline3"><a href="changes.html#q122" class="tocxref">C.4.32 Section 15.2.2 Font family</a>
<li class="tocline3"><a href="changes.html#q123" class="tocxref">C.4.33 Section 15.3.1 Generic font families</a>
<li class="tocline3"><a href="changes.html#q124" class="tocxref">C.4.34 Section 15.4 Font styling</a>
<li class="tocline3"><a href="changes.html#q125" class="tocxref">C.4.35 Section 15.5 Small-caps</a>
<li class="tocline3"><a href="changes.html#q126" class="tocxref">C.4.36 Section 15.6 Font boldness</a>
<li class="tocline3"><a href="changes.html#q127" class="tocxref">C.4.37 Section 15.7 <p>Clarified relationship of font size to em squares.</p> <p>Added a totally irrelevant note about font sizes virtual reality scenes.</p> <h3 id="x76">Section 16.1</a>
<li class="tocline3"><a href="changes.html#q128" class="tocxref">C.4.38 16.2 Alignment: the 'text-align' property</a>
<li class="tocline3"><a href="changes.html#q129" class="tocxref">C.4.39 Section 17.5.1 Table layers and transparency</a>
<li class="tocline3"><a href="changes.html#q130" class="tocxref">C.4.40 Section 17.5.2 Table width algorithms</a>
<li class="tocline3"><a href="changes.html#q131" class="tocxref">C.4.41 17.6.1 The separated borders model</a>
<li class="tocline3"><a href="changes.html#q132" class="tocxref">C.4.42 Borders around empty cells: the 'empty-cells' property</a>
<li class="tocline3"><a href="changes.html#q133" class="tocxref">C.4.43 Section 17.6.2 The collapsing borders model</a>
<li class="tocline3"><a href="changes.html#q134" class="tocxref">C.4.44 Section 18.2</a>
<li class="tocline3"><a href="changes.html#q135" class="tocxref">C.4.45 Section A.3</a>
<li class="tocline3"><a href="changes.html#q136" class="tocxref">C.4.46 Appendix G.2 Lexical scanner</a>
<li class="tocline3"><a href="changes.html#q137" class="tocxref">C.4.47 Appendix E. References</a>
</ul>
</ul>
</div>
<P><em>This appendix is informative, not normative.</em></P>
<P>CSS 2.1 is an updated revision of CSS2. The changes between the
CSS2 specification (see <a href="refs.html#ref-CSS2" rel="biblioentry" class="noxref"><span class="informref">[CSS2]</span></a>) and this specification fall into
five groups: known errors, typographical errors, clarifications,
changes and additions. Typographical errors are not listed here.</P>
<p>This chapter is not a complete list of changes. Minor editorial
changes and most changes to examples are also not listed here.</p>
<h2>C.1 <a name="new">Additional property values</a></h2>
<h3 id="s-4-3-5"><a name="q2">C.1.1 </a><a href="syndata.html#color-units">Section 4.3.5
Colors</a></h3>
<p>New color value: 'orange'
<h3 id="s-9-2-4"><a name="q3">C.1.2 </a><a href="visuren.html#propdef-display">Section 9.2.4
The 'display' property</a>&l
12A6
t;/h3>
<p>New 'display' value: 'inline-block'
<h3 id="s-12-2a"><a name="q4">C.1.3 </a><a href="generate.html#content">Section 12.2 The
'content' property</a></h3>
<p>New 'content' values 'none' and 'normal'. (The values 'none' and
'normal' are equivalent in CSS 2.1, but may have different
functions in CSS3.)
<h3 id="s-18-1"><a name="q5">C.1.4 </a><a href="ui.html#propdef-cursor">Section 18.1 Cursors:
the 'cursor' property</a></h3>
<p>New 'cursor' value: 'progress'
<h3 id="s-16-6"><a name="q6">C.1.5 </a><a href="text.html#propdef-white-space">Section 16.6
Whitespace: the 'white-space' property</a></h3>
<p>New 'white-space' values: 'pre-wrap' and 'pre-line'
<h2>C.2 <a name="changes">Changes</a></h2>
<h3 id="c1.1"><a name="q8">C.2.1 </a><a href="about.html#q1">Section 1.1 CSS 2.1 vs CSS 2</a></h3>
<p>This new section is added to explain the motivation for CSS2.1
and its relation to CSS2.</p>
<h3 id="c1.2"><a name="q9">C.2.2 </a><a href="about.html#q2">Section 1.2 Reading the specification</a></h3>
<p>This section (formerly Section 1.1) has been marked non-normative.</p>
<h3 id="c1.3"><a name="q10">C.2.3 </a><a href="about.html#q3">Section 1.3 How the specification is organized</a></h3>
<p>This section (formerly Section 1.2) has been marked non-normative.</p>
<h3 id="c1.4.2.1"><a name="q11">C.2.4 </a><a href="about.html#q7">Section 1.4.2.1 Value</a></h3>
<p>This section (formerly unnumbered under 1.3.2) notes that value types are specified
in terms of tokens and that spaces may appear between tokens in values. A note
explains that spaces are required between some tokens.</p>
<h3 id="c1.4.2.6"><a name="q12">C.2.5 </a><a href="about.html#q12">Section 1.4.2.6 Media groups</a></h3>
<p>This section (formerly unnumbered under 1.3.2) now declares the Media line
in property definitions to be non-normative.</p>
<h3 id="c1.4.2.7"><a name="q13">C.2.6 </a><a href="about.html#q13">Section 1.4.2.7 Computed value</a></h3>
<p>A new line is added to each property definition specifying what the computed
values are for the property. (This defines what level of computation is done to
a property value before inheritance and before certain other calculations.)</p>
<h3 id="c1.4.4"><a name="q14">C.2.7 </a><a href="about.html#q15">Section 1.4.4 Notes and examples</a></h3>
<p>This section (formerly 1.3.4) now specifies that HTML examples lacking DOCTYPE
declarations are SGML Text Entities conforming to the HTML 4.01 Strict DTD [HTML4].
The markup for many examples has been reformulated to either include a DOCTYPE or
conform to this definition.</p>
<h3 id="c1.5"><a name="q15">C.2.8 </a><a href="about.html#q17">Section 1.5 Acknowledgements</a></h3>
<p>This section (formerly 1.4) has been updated to reflect contributions to CSS2.1
and has been marked non-normative.<p>
<h3 id="c3.2"><a name="q16">C.2.9 </a><a href="conform.html#conformance">Section 3.2
Conformance</a></h3>
<p>Support for user style sheets is now required (in most cases),
rather than just recommended.
<p>Support for turning of author style sheets is now required.</p>
<p>Application of CSS properties to form controls is explicitly undefined.
Authors are recommended to treat form control styling capabilities in UAs
as experimental.</p>
<h3 id="c3.2"><a name="q17">C.2.10 </a><a href="conform.html#q3">Section 3.3
Error Conditions</a></h3>
<p>This section changed to say that error handling <em>is</em> specified
in most cases.</p>
<h3 id="c6.1"><a name="q18">C.2.11 </a><a href="cascade.html#q1">Section 6.1 Specified, computed, and actual values</a></h3>
<p>Redefined "computed value" and created the concept of "used value"
so that inheritance can be performed without laying out the document.
This change has the effect of allowing (requiring) percentages to be inherited
as percentages and affects many other layout calculations throughout the spec.</p>
<p>Since computed value of a property can now also be a percentage. In
particular, the following properties now inherit the percentage if the
specified value is a percentage:
<ul>
<li>background-position
<li>bottom, left, right, top
<li>height, width
<li>margin-bottom, margin-left, margin-right, margin-top,
<li>min-height, min-width
<li>padding-bottom, padding-left, padding-right, padding-top
<li>text-indent
</ul>
<p>Note that only 'text-indent' inherits by default, the others only
inherit if the 'inherit' keyword is specified.
<h3 id="c6.4.1"><a name="q19">C.2.12 </a><a href="cascade.html#cascading-order">Section 6.4.1 Cascading order</a></h3>
<p>Changed suggestion that user be able to turn off author styles to a requirement.</p>
<h3 id="c6.4.3"><a name="q20">C.2.13 </a><a href="cascade.html#specificity">Section 6.4.3
Calculating a selector's specificity</a></h3>
<p>The "style" attribute now has a higher specificity than any style
rule.</p>
<p>Pseudo-elements are now counted with elements in calculating a
a selector's specificity.</p>
<h3 id="c6.4.4"><a name="q21">C.2.14 </a><a href="cascade.html#q13">Section 6.4.4 Precedence
of non-CSS presentational hints</a></h3>
<p>"Non-CSS presentational hints" no longer exist, with the exception
of a small set of attributes in HTML.</p>
<h3 id="c8.3"><a name="q22">C.2.15 a href="box.html#margin-properties">Section 8.3 Margin properties</a></a></h3>
<p>If the containing block's width depends on an element with percentage
margins, then the resulting layout is undefined in CSS 2.1.</p>
<h3 id="c8.3.1"><a name="q23">C.2.16 </a><a href="box.html#collapsing-margins">Section 8.3.1 Collapsing margins</a></h3>
<p>In the definition of "collapsing margins", added "non-empty content"
and "clearance" to the parenthetical list of things that prevent consecutive
margins from being adjoining.</p>
<p>Vertical margins of elements with 'overflow' other than 'visible' no longer
collapse with their in-flow children.</p>
<p>Defined how margins collapse through an element with adjoining top and
bottom margins.</p>
<p>Added that margins of the root element's box do not collapse.</p>
<p>More rigorously <a href="box.html#what-is-adjoining">defined "adjoining" for margin collapsing</a>.</p>
<h3 id="c8.4"><a name="q24">C.2.17 </a><a href="box.html#padding-properties">Section 8.4 Padding properties</a></h3>
<p>If the containing block's width depends on an element with percentage
padding, then the resulting layout is undefined in CSS 2.1.</p>
<h3 id="c8.5.2"><a name="q25">C.2.18 </a><a href="box.html#border-color-properties">Section 8.5.2 Border color</a></h3>
<p>'transparent' can now be specified independently for each border side,
on par with <color>.</p>
<h3 id="c8.5.3"><a name="q26">C.2.19 </a><a href="box.html#border-style-properties">Section 8.5.3 Border style</a></h3>
<p>3D border styles ('groove', 'ridge', 'inset', 'outset') now depend on the
corresponding border-color rather than on 'color'.</p>
<h3 id="c8.6"><a name="q27">C.2.20 </a><a href="box.html#q11">Section 8.6 The box model for inline elements in bidirection context</a></h3>
<p>Added this new section to specify layout of inline boxes when affected by bidi.</p>
<h3 id="visuren"><a name="q28">C.2.21 </a><a href="visuren.html">Chapter 9 Visual formatting
model</a></h3>
<p>The value 'compact' for 'display' does not exist in CSS 2.1.
<h3 id="s-10-3-7"><a name="q29">C.2.22 </a><a
href="visudet.html#abs-non-replaced-width">Section 10.3.7 Absolutely
positioned, non-replaced elements</a></h3>
<p>Absolutely positioned elements can now "shrink-wrap" their
contents:
<p>When both 'width' and 'right' (or 'width' and 'left') are 'auto',
the element's computed width is the width of the contents (using an
algorithm similar to that for table cells) and then 'right' (or
'left') is solved for. CSS2 incorrectly said that 'right' (or 'left') was
set to 0 in that case, and then width was solved for.
<h3 id="s-10-6-4"><a name="q30">C.2.23 </a><a
href="visudet.html#abs-non-replaced-height">Section 10.6.4 Absolutely
positioned, non-replaced elements</a></h3>
<p>Like normal-flow block-level elements, absolutely positioned
elements by default take on the height of their contents
("shrink-wrap"). If 'height' and 'bottom' are both 'auto', the
computed value of 'height' is set to the height of the contents and
then 'bottom' is solved. CSS2 incorrectly said the reverse: 'bottom'
was set to 0 and then height was solved.
<h3 id="c11.1.2"><a name="q31">C.2.24 </a><a href="visufx.html#clipping">Section 11.1.2 Clipping:
the 'clip' property</a></h3>
<p>While CSS2 specified that values of "rect()" give offsets from the
respective sides of the box, current implementations interpret values
with respect to the top and left edges for <em>all</em> four values
(top, right, bottom, and left). This is now the specified
interpretation.
<h3 id="c14.2.1"><a name="q32">C.2.25 </a><a href="colors.html#background-properties">Section
14.2.1 Background properties</a></h3>
<p>For 'background-position', the restriction that keywords cannot
be combined with percentage or length values is removed. I.e., a
value like: '25% top' is now allowed. Also, 'background-position'
now applies to all elements, not just to block-level and replaced
elements.</p>
<p>User agents are no longer allowed to treat a value of 'fixed'
for 'background-attachment' as 'scroll'. Instead they must ignore
all such declarations as if 'fixed' were an invalid value.</p>
<h3 id="c14.3"><a name="q33">C.2.26 </a><a href="colors.html#gamma-correction">Section
14.3 Gamma correction</a></h3>
<p>The contents of this section is now a non-normative note.</p>
<h3 id="c15"><a name="q34">C.2.27 </a><a href="fonts.html">Chapter 15 Fonts</a></h3>
<p>The 'font-stretch' and 'font-size-adjust' properties have
been removed in CSS 2.1.</p>
<p>Font descriptors, the '@font-face' declaration, and all
associated parts of the font matching algorithm have been
removed in CSS 2.1.</p>
<h3 id="c15.2"><a name="q35">C.2.28 </a><a href="fonts.html#algorithm">Section 15.2
Font matching algorithm</a></h3>
<p>In this section (previously 15.5), in step 5 (prevously 8)
of the font matching algorith, the UA is now allowed to use
multiple default fallback fonts to find a glyph for a given
character.</p>
<p>In the per-property rule 2, specified that if there is only
a small-caps font in a given family, then that font will be
selected by 'normal'.</p>
<h3 id="c15.3"><a name="q36">C.2.29 </a><a href="fonts.html#font-family-prop">Section 15.2.2 Font family</a></h3>
<p>The "missing character" glyph is no longer considered a match
for the last font in a font set, but is now considered a match
for U+FFFD.</p>
<p>Certain punctuation characters when appearing in unquoted font
family names are now required to be escaped.</p>
<h3 id="c15.5"><a name="q37">C.2.30 </a><a href="fonts.html#small-caps">Section 15.5
Small-caps</a></h3>
<p>The 'font-variant' property's effect is no longer restricted to
bicameral scripts.</p>
<h3 id="c15.6"><a name="q38">C.2.31 </a><a href="fonts.html#font-boldness">Section 15.6
Font boldness</a></h3>
<p>The computed value of 'font-weight' has been defined more
precisely such that the 'bolder' and 'lighter' values have an
appropriate effect when inheriting through elements with
different font-families.</p>
<h3 id="c15.7"><a name="q39">C.2.32 </a><a href="fonts.html#font-size-props">Section 15.7
Font size</a></h3>
<p>Removed suggestion of 1.2 fixed ratio between keyword font
sizes in favor of notes recommending a variable ratio and a
smallest font-size no less than 9 pixels per EM unit.</p>
<p>Added table mapping CSS font-size keywords to HTML font size numbers.</p>
<h3 id="s-17-4-1"><a name="q40">C.2.33 </a><a href="tables.html#q6">17.4.1 Caption position
and alignment</a></h3>
<p>The 'left' and 'right' values on 'caption-side' have been removed.
<h3 id="s-17-5-4"><a name="q41">C.2.34 </a><a href="tables.html#column-alignment">17.5.4
Horizontal alignment in a column</a></h3>
<p>The <string> value for 'text-align' is not part of
CSS 2.1.
<h3 id="s-17-6"><a name="q42">C.2.35 </a><a href="tables.html#borders">Section 17.6
Borders</a></h3>
<p>Several popular browsers assume an initial value for
'border-collapse' of 'separate' rather than 'collapse' or exhibit
behavior that is close to that value, even if they do not actually
implement the CSS table model. 'Separate' is now the initial value.
<h3 id="s-12"><a name="q43">C.2.36 </a><a href="generate.html">Chapter 12 Generated content,
automatic numbering, and lists</a></h3>
<p>The 'marker' value for 'display' does not exist in CSS 2.1
<h3 id="page"><a name="q44">C.2.37 </a><a href="page.html">Chapter 13 Paged media</a></h3>
<p>The 'size', 'marks' and 'page' properties are not in CSS 2.1.
<h3 id="text"><a name="q45">C.2.38 </a><a href="text.html">Chapter 16 Text</a></h3>
<p>The 'text-shadow' property is not in CSS 2.1.
<h3 id="a-a"><a name="q46">C.2.39 </a><a href="aural.html">Appendix A. Aural style
sheets</a></h3>
<p>Chapter 19 on aural style sheets has become appendix A and is not
normative in CSS 2.1. Related units (deg, grad, rad, ms, s, Hz,
kHz) are also moved to this appendix, as is the 'speak-header'
property from the "tables" chapter and other notes on aural table
rendering. The 'aural' media type is deprecated in favor of the new
'speech' media type.</p>
<h3 id="a-a-5"><a name="q47">C.2.40 </a><a href="aural.html#pause-props">Appendix A Section 5 Pause properties</a></h3>
<p>A note has been added to this section (formerly 19.4) about the change
in position and behavior of pauses in CSS3 Speech compared to this appendix.</p>
<h3 id="a-a-6"><a name="q48">C.2.41 </a><a href="aural.html#cue-props">Appendix A Section 6 Cue properties</a></h3>
<p>This section (formerly Section 19.5) now specifies the placement
of cues and pauses with respect to the :before and :after pseudo-elements.</p>
<h3 id="other"><a name="q49">C.2.42 Other</a></h3>
<p>The former informative appendix C, "Implementation and
performance notes for fonts," is left out of CSS 2.1.
<h2>C.3 <a name="known-errors">Errors</a></h2>
<h3 id="x-shorthand-inherit"><a name="q51">C.3.1 Shorthand properties</a></h3>
<p>Shorthand properties take a list of subproperty values <em>or</em>
the value 'inherit'. One cannot mix 'inherit' with other subproperty
values as it would not be possible to specify the subproperty to which
'inherit' applied. The definitions of a number of shorthand properties
did not enforce this rule: 'border-top', 'border-right',
'border-bottom', 'border-left', 'border', 'background', 'font',
'list-style', 'cue', and 'outline'.
<h3 id="x-applies-table"><a name="q52">C.3.2 Applies to</a></h3>
<p>The "applies to" line of many property definitions has been made more
accurate by excluding or including table display types where appropriate.</p>
<h3 id="x6.4"><a name="q53">C.3.3 </a><a href="cascade.html#cascade">Section 6.4 The cascade</a></h3>
<p>Removed paragraph about imported style sheets being overridden by
rules in the importing style sheet: imported style rules follow the
cascade as specified in <a href="cascade.html#cascading-order">6.4.1
Cascading order</a>, exactly as if they were inserted in place of the
@import rule.</p>
<h3 id="x8.1"><a name="q54">C.3.4 </a><a href="box.html#box-dimensions">Section 8.1 Box Dimensions</a></h3>
<p>The definition of "content edge" has been changed to depend on 'width'
and 'height' rather than directly on 'rendered content'.</p>
<p>From the definition of "padding edge", deleted the sentence "The
padding edge of a box defines the edges of the containing block
established by the box." For information about containing
blocks, consult <a href="visudet.html#containing-block-details">
Section 10.1</a>.</p>
<h3 id="x14.2"><a name="q55">C.3.5 </a><a href="colors.html#q2">14.2 The background</a></h3>
<p>Second sentence: "In terms of the box model, 'background' refers to
the background of the content and the padding areas" now also
mentions the border area. (See also <a href="#x60">errata to section
8.1</a> above.) Thus:
<blockquote>
<p>In terms of the box model, "background" refers to the background of
the content, padding and border areas.
</blockquote>
<h3 id="x14.2.1"><a name="q56">C.3.6 </a><a href="colors.html#background-properties">14.2.1
Background properties</a></h3>
<p>Under 'background-image', defined the image tile size used when
the background image has intrinsic sizes specified in percentages
or no intrinsic size.</p>
<p>Under 'background-repeat',
the sentence "All tiling covers the content and padding areas [...]"
has been corrected to
<blockquote><p>"All tiling covers the content, padding <ins>and
border</ins> areas [...]".</blockquote>
<p>Under 'background-attachment', the value 'scroll' is defined to
scroll with the "containing block" rather than with the "document".
Also the sentence "Even if the image is fixed [...] background or padding
area of the element" has been corrected to
<blockquote><p>Even if the image is fixed, it is still only visible
when it is in the background, padding <ins>or border</ins> area of the
element.</blockquote>
<h3 id="x15.7"><a name="q57">C.3.7 </a><a href="fonts.html#font-size-props">Section 15.7
Font size</a></h3>
<p>The statement "Negative values are not allowed" for 'font-size'
now applies to percentages as well as lengths.</p>
-------------------
<h3 id="x4.1.1"><a name="q58">C.3.8 </a><a href="syndata.html#tokenization">Section 4.1.1</a> (and
<a href="grammar.html#q2">G2</a>)</h3>
<ul>
<li>The "nmchar" token also allows the range "A-Z".
<li>In the rule for "any" (in the core syntax), changed "FUNCTION"
to "FUNCTION any* ')'".
</ul>
<p id="underscore">The underscore character
("_") is allowed in identifiers. The definitions of the lexical
macros "nmstart" and "nmchar" now include it.
<h3 id="x4.1.3"><a name="q59">C.3.9 </a><a href="syndata.html#q4">4.1.3 Characters and case</a></h3>
<p>In the third bullet, added to point 1:
<blockquote>
<p>1.with a space (or other whitespace character): "\26 B" ("&B")
</blockquote>
<p>the following text: "In this case, user agents should treat a
"CR/LF" pair (13/10) as a single whitespace character."
<p>The underscore is
allowed in identifiers. Changed "In CSS2, identifiers [...] can contain
only the characters [A-Za-z0-9] and ISO 10646 characters 161 and
higher, plus the hyphen (-)" to:
<blockquote><p>In CSS2, identifiers [...] contain only the characters
[A-Za-z0-9] and ISO 10646 characters 161 and higher, plus the hyphen
(-) and the underscore (_)</p></blockquote>
<h3 id="x4.3"><a name="q60">C.3.10 </a><a href="syndata.html#values">Section 4.3 (Double sign problem)</a></h3>
<p>Several values described in subsections of this section
incorrectly allowed two "+" or "-" signs at their beginnings.
<h3 id="x4.3.2"><a name="q61">C.3.11 </a><a href="syndata.html#length-units">Section 4.3.2
Lengths</a></h3>
<p>The suggested reference
pixel is based on a <ins>96 dpi</ins> device, not 90 dpi.
The visual angle is thus about <ins>0.0213 degrees</ins> instead of
0.0227, and a pixel at arm's length is about <ins>0.26 mm</ins>
instead of 0.28
<h3 id="x4.3.6"><a name="q62">C.3.12 </a><a href="syndata.html#color-units">Section 4.3.6</a></h3>
<p>Deleted the comments about range
restriction after the following examples:
<pre>
em { color: rgb(255,0,0) }
em { color: rgb(100%, 0%, 0%) }
</pre>
<h3 id="x7"><a name="q63">C.3.13 </a><a href="selector.html#q2">5.10 Pseudo-elements and pseudo-classes</a></h3>
<p>In the second bullet, the following sentence was incomplete: "The
exception is ':first-child', which can be deduced from the document
tree." The ':lang()' pseudo-class can be deduced
from the document in some cases.
<h3 id="x8.2"><a name="q64">C.3.14 </a><a href="box.html#mpb-examples">8.2 Example of margins, padding, and borders</a></h3>
<p>The colors in the example HTML did not match the colors in the
image.
<h3 id="x8.5.2"><a name="q65">C.3.15 </a><a href="box.html#border-color-properties">Section
8.5.2 Border color: 'border-top-color', 'border-right-color',
'border-bottom-color', 'border-left-color', and
'border-color'</a></h3>
<p>The value 'transparent' is
also allowed on 'border-top-color', 'border-right-color', etc. Changed
the line "Value: <color> | inherit" to
<blockquote><p>Value: <color> | transparent | inherit</blockquote>
<h3 id="x8.4"><a name="q66">C.3.16 </a><a href="box.html#padding-properties">Section 8.4 Padding properties</a></h3>
<p>The five properties related to padding ('padding', 'padding-top',
'padding-right', 'padding-bottom', and 'padding-left') now say that
they don't apply to table rows, row groups, header groups, footer
groups, columns, and column groups.
<h3 id="x8.5.3"><a name="q67">C.3.17 </a><a href="box.html#border-style-properties">8.5.3 Border
style</a></h3>
<p>Changed the sentence "The color of borders drawn for values of
'groove', 'ridge', 'inset', and 'outset' depends on the element's
'color' property" to
<blockquote><p>The color of borders drawn for values of 'groove',
'ridge', 'inset', and 'outset' should be based on the element's
'border-color' property, but UAs may choose their own algorithm to
calculate the actual colors used. For instance, if the 'border-color'
has the value 'silver', then a UA could use a gradient of colors from
white to dark gray to indicate a sloping border.</blockquote>
<h3 id="x8.5.4"><a name="q68">C.3.18 </a><a
href="box.html#border-shorthand-properties">Section 8.5.4 Border
shorthand properties: 'border-top', 'border-bottom', 'border-right',
'border-left', and 'border'</a></h3>
<p>Changed <'border-top-width'> to <border-width> as the first
value option for 'border-top', 'border-right', 'border-bottom',
and 'border-left', and changed <'border-style'> to <border-style>.
For 'border', changed <'border-width'>
to <border-width> and
<'border-style'> to <border-style>.
<p>The value 'transparent' is
also allowed on 'border-top', 'border-bottom', 'border-right',
'border-left', and 'border'.
<p>Changed the two lines "Value: [ <'border-top-width'> ||
<'border-style'> || <color> | inherit" to
<blockquote><p>Value: [ <border-top-width> || <border-style>
|| [<color> | transparent] | inherit</blockquote>
<h3 id="x10"><a name="q69">C.3.19 </a><a href="box.html#value-def-border-width">8.5.4 Border shorthand properties: 'border-top', 'border-bottom', 'border-right', 'border-left', and
'border'</a></h3>
<p>Changed <'border-top-width'> to <border-width> as the first
value option for 'border-top', 'border-right', 'border-bottom',
and 'border-left', and changed <'border-style'> to <border-style>.
For 'border', changed <'border-width'>
to <border-width> and
<'border-style'> to <border-style>.
<h3 id="x11"><a name="q70">C.3.20 </a><a href="visuren.html#choose-position">Section 9.3.1</a></h3>
<p>The definition of the value 'static' now
says that the properties 'top', 'right', 'bottom', and 'left'
do not apply.
<h3 id="x12"><a name="q71">C.3.21 </a><a href="visuren.html#position-props">Section 9.3.2</a></h3>
<p>The properties 'top', 'right', 'bottom', and 'left', incorrectly
referred to offsets with respect to a box's content edge. The proper edge
is the margin edge. Thus, for 'top', the description now reads:
"This property specifies how far a box's top margin edge is offset
below the top edge of the box's containing block."
<h3 id="x13"><a name="q72">C.3.22 </a><a href="visuren.html#relative-positioning">Section 9.4.3</a></h3>
<p>In the first sentence, added to the end of
"Once a box has been laid out according to the normal flow"
the words "or floated,".
<h3 id="s-9-7"><a name="q73">C.3.23 </a><a href="visuren.html#dis-pos-flo">Section
9.7 Relationships between 'display', 'position', and 'float'</a></h3>
<p>If an element floats, the
'display' property is set to a block-level value, but not necessarily
'block'. In bullet 3, changed "Otherwise, if 'float' has a value other
than 'none', 'display' is set to 'block' and the box is floated" to a
table with the proper computed values.
<h3 id="x14"><a name="q74">C.3.24 </a><a href="visudet.html#inline-replaced-width">Section 10.3.2
Inline, replaced elements</a> (and 10.3.4, 10.3.6, and 10.3.8)</h3>
<p>Changed:</p>
<blockquote>
<p> A specified value of 'auto' for 'width' gives the element's intrinsic
width as the computed value.
</blockquote>
<p>to:</p>
<blockquote>
<p> If 'width' has a specified value of 'auto' and 'height' also has a
specified value of 'auto', the element's intrinsic width is the
computed value of 'width'. If 'width' has a specified value of
'auto' and 'height' has some other specified value, then the computed
value of 'width' is
(intrinsic width) * ( (computed height) / (intrinsic height) ).
</blockquote>
<h3 id="x15"><a name="q75">C.3.25 </a><a href="visudet.html#blockwidth">Section 10.3.3</a></h3>
<p>In the last sentence of the paragraph following the equation
("If the value of 'direction' is 'ltr', this happens to
'margin-left' instead") substituted 'rtl' for 'ltr'.
<h3 id="x16"><a name="q76">C.3.26 </a><a href="visudet.html#inline-replaced-height">Section 10.6.2
Inline, replaced elements ...</a> (and 10.6.5)</h3>
<p>Changed:</p>
<blockquote>
<p> If 'height' is 'auto', the computed value
is the intrinsic height.
</blockquote>
<p>to:</p>
<blockquote>
<p> If 'height' has a specified value of 'auto' and 'width' also has a
specified value of 'auto', the element's intrinsic height is the
computed value of 'height'. If 'height' has a specified value of
'auto' and 'width' has some other specified value, then the computed
value of 'height' is
(intrinsic height) * ( (computed width) / (intrinsic width) ).
</blockquote>
<h3 id="x17"><a name="q77">C.3.27 </a><a href="visudet.html#normal-block">Section 10.6.3</a></h3>
<p>The height calculation for block-level, non-replaced elements in
normal flow, and floating, non-replaced elements was not quite
correct. It now takes into account the case when margins do not
collapse, due to the presence of a padding or border.
<h3 id="x18"><a name="q78">C.3.28 </a><a href="visufx.html#overflow">Section 11.1.1</a></h3>
<p>The example of a DIV element containing a BLOCKQUOTE containing
another DIV was not rendered correctly. The first style rule applied
to both DIVs, so the second DIV box should have been rendered with a
red border as well. The second DIV has now been changed to a CITE,
which doesn't have a red border.
<h3 id="s-11-2"><a name="q79">C.3.29 </a><a href="visufx.html#propdef-visibility">11.2
Visibility: the 'visibility' property</a></h3>
<p>Changed "initial" and
"inherited" to:
<blockquote><p>
<em>Initial:</em> visible<br>
<em>Inherited:</em> yes
</blockquote>
<p>This has the same effect as the original definition, but removes
the undefined state of the root element (which was a problem for DOM
implementations).
<h3 id="x20"><a name="q80">C.3.30 </a><a href="generate.html#lists">12.6.2 Lists</a></h3>
<p>Under the 'list-style' property, the example:</p>
<pre>
ul > ul { list-style: circle outside } /* Any UL child of a UL */
</pre>
<p>could never match valid HTML markup (since a UL element
cannot be a child of another UL element). An LI has been inserted in
between.
<h3 id="x23"><a name="q81">C.3.31 </a><a href="fonts.html#algorithm">Section 15.5</a></h3>
<p>In bullet 2, changed "the UA uses the 'font-family' descriptor"
to "the UA uses the 'font-family' property".
<p>In bullet 6, changed "steps 3, 4 and 5" to
"steps 2, 3, 4 and 5".
<h3 id="s-16-6a"><a name="q82">C.3.32 </a><a href="text.html#propdef-white-space">Section 16.6
Whitespace: the 'white-space' property</a></h3>
<p>The 'white-space' property
applies to <em>all</em> elements, not just block-level elements.
<h3 id="x24"><a name="q83">C.3.33 </a><a href="tables.html#q2">Section 17.2 The CSS table
model</a></h3>
<p>In the definition of <strong>table-header-group</strong>, changed
"footer" to "header" in "Print user agents may repeat footer rows on
each page spanned by a table."
<h3 id="x25"><a name="q84">C.3.34 </a><a href="tables.html#anonymous-boxes">17.2.1 Anonymous table objects </a></h3>
<p>Moved the first bullet text to the prose before the list of
generation rules and added missing rules.
<h3 id="x26"><a name="q85">C.3.35 </a><a href="tables.html#q7">17.5 Visual layout of table
contents</a></h3>
<p>The following note:</p>
<blockquote>
<p><strong>Note.</strong> Table cells may be relatively and absolutely positioned, but this is not recommended: positioning and floating remove a
box from the flow, affecting table alignment.
</p>
</blockquote>
<p>has been amended as follows:</p>
<blockquote>
<p><strong>Note.</strong> Table cells may be
positioned, but this is not recommended: absolute and fixed
positioning, as well as floating, remove a box from the flow, affecting
table size.
</p>
</blockquote>
<h3 id="x27"><a name="q86">C.3.36 </a><a href="tables.html#q7">17.5 Visual layout of table
contents</a></h3>
<p>Changed:
<blockquote>
<p>Like other elements of the document language, internal table
elements generate rectangular boxes with content, padding, and
borders. They do not have margins, however.
</blockquote>
<p>to:
<blockquote>
<p>Like other elements of the document language, internal table
elements generate rectangular boxes with content and
borders. Cells have padding as well. Internal table elements do not
have margins.
</blockquote>
<h3 id="s-17-5-1"><a name="q87">C.3.37 </a><a href="tables.html#table-layers">Section 17.5.1
Table layers and transparency</a></h3>
<p>The rows and columns only cover the whole table in the collapsed
borders model, not in the separated borders model. The points 2, 3, 4
and 5 have been corrected to define the area covered by rows, columns,
row groups and column groups in terms of the cells they cover.
<h3 id="x28"><a name="q88">C.3.38 </a><a href="tables.html#separated-borders">Section 17.6.1 The
separated borders model</a></h3>
<p>In the image, changed "cell-spacing" to "border-spacing".
<h3 id="underscore2"><a name="q89">C.3.39 </a><a href="grammar.html#q2">Appendix D.2 Lexical
scanner</a></h3>
<p>The underscore character
("_") is be allowed in identifiers. The definitions of the lexical
macros "nmstart" and "nmchar" have been fixed.
<p>Note that the tokenizer is case-insensitive, so uppercase A-Z is
matched as well.
<p>(Same change in section 4.1.1, see <a href="#underscore">above</a>.)
<h2>C.4 <a name="clarifications">Clarifications</a></h2>
<h3 id="r2.2"><a name="q91">C.4.1 </a><a
href="intro.html#q2">2.2 A brief CSS2
tutorial for XML</a></h3>
<p>The specification for the <a
href="http://www.w3.org/1999/06/REC-xml-stylesheet-19990629/">XML
style sheet PI</a>
was written after CSS2 was finalized. The first line of the full XML
example should not have been be <code><?XML:stylesheet type="text/css"
href="bach.css"?></code>, but
<pre><?xml-stylesheet type="text/css" href="bach.css"?></pre>
<h3 id="r3.1"><a name="q92">C.4.2 </a><a href="conform.html#defs">Definitions</a></h3>
<p>Added a note to clarify that the deprecated/non-deprecated status
of a feature is distinct from its normative/non-normative status.</p>
<p>Under 'document language' clarified that CSS only describes the
presentation of a document language, and has no effect on its semantics.</p>
<p>Changed definition of 'replaced element' to "an element whose content
is outside the scope of the CSS formatting model" and added further clarifying
text. This clarifies that e.g. SVG images embedded in an XML document are
also considered replaced elements, not just those linked in from an outside
file. Also changed definition of 'rendered content' to be consistent with this
clarification.</p>
<p>Added definition for 'ignore'.</p>
<p>Added definition for 'HTML user agent'.</p>
<p>Added definition for 'property'.</p>
<h3 id="x54"><a name="q93">C.4.3 </a><a href="syndata.html#tokenization">Section 4.1.1</a></h3>
<p>DELIM should not have included single or double quote. Refer also
to section 4.1.6 on strings, which must have matching single or
double quotes around them.
<h3 id="x55"><a name="q94">C.4.4 </a><a href="selector.html#descendant-selectors">Section 5.5</a></h3>
<p>Near the end of the section, the text 'Note the whitespace on