-
Notifications
You must be signed in to change notification settings - Fork 790
Expand file tree
/
Copy pathOverview.html
More file actions
executable file
·786 lines (599 loc) · 28.1 KB
/
Overview.html
File metadata and controls
executable file
·786 lines (599 loc) · 28.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
<!DOCTYPE html>
<html lang=en>
<head>
<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
<title>CSS TEMPLATE Module Level N</title>
<!--
<link href="http://purl.org/dc/terms/" rel="schema.dcterms">
<link href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright" rel="dcterms.rights">
-->
<meta content="CSS TEMPLATE Module Level N" name=dcterms.title>
<meta content=text name=dcterms.type>
<meta content=2014-03-07 name=dcterms.date>
<meta content="[editor1 name]" name=dcterms.creator>
<meta content="[editor2 name]" name=dcterms.creator>
<meta content=W3C name=dcterms.publisher>
<meta content="http://dev.w3.org/csswg/css-module/"
name=dcterms.identifier>
<link href="#contents" rel=contents>
<link href="#index" rel=index>
<link href="../default.css" rel=stylesheet type="text/css">
<link href="../csslogo.ico" rel="shortcut icon" type="image/x-icon">
<link href="http://www.w3.org/StyleSheets/TR/W3C-ED.css" rel=stylesheet
type="text/css">
<style type="text/css">
/* delete this block when you've cleared out all the .replaceme elements */
.replaceme {
border: solid red;
padding: 0 0.5em;
margin: 0 0.1em;
background: yellow;
color: green;
}
.replaceme:before {
content: "FIXME(";
color: black;
}
.replaceme:after {
content: ")";
color: black;
}
</style>
<body class=h-entry>
<div class=head> <!--begin-logo-->
<p><a href="http://www.w3.org/"><img alt=W3C height=48
src="http://www.w3.org/Icons/w3c_home" width=72></a> <!--end-logo-->
<h1 class=p-name>CSS TEMPLATE Module Level N</h1>
<h2 class="no-num no-toc">Editor's Draft <time class=dt-updated
datetime=20140307> 7 March 2014</time>
<!-- for HTML4.x doctypes: <span class="dt-updated"><span class="value-title" title="20140307"> 7 March 2014</span></span> --></h2>
<dl>
<dt>This version:
<dd><a class=u-url
href="http://dev.w3.org/csswg/css-module/">http://dev.w3.org/csswg/css-module/</a>
<dt>Latest version:
<dd><a href="http://www.w3.org/TR/css-module/"><var
class=replaceme>http://www.w3.org/TR/css-module/</var></a>
<dt>Editor's draft:
<dd><a
href="http://dev.w3.org/csswg/css-module/">http://dev.w3.org/csswg/css-module/</a>
(<a
href="https://hg.csswg.org/drafts/log/tip/css-module/Overview.src.html">change
log</a>)
<dt>Previous version:
<dd><a href="http://www.w3.org/PreviousVersionURI">
http://www.w3.org/PreviousVersionURI</a>
<dt>Issue Tracking:
<dd><a href="http://www.w3.org/Style/CSS/Tracker/products/FIXME"
rel=issues>http://www.w3.org/Style/CSS/Tracker/products/FIXME</a>
<!-- or use the wiki:
<dd><a rel="issues" href="http://wiki.csswg.org/spec/cssN-FIXME"
>http://wiki.csswg.org/spec/cssN-FIXME</a></dd>
-->
<dt>Feedback:
<dd><a
href="mailto:www-style@w3.org?subject=%5BSHORTNAME%5D%20feedback">www-style@w3.org</a>
with subject line “<kbd>[css-module] <var>… message topic
…</var></kbd>” (<a
href="http://lists.w3.org/Archives/Public/www-style/"
rel=discussion>archives</a>)
<dt>Editors:
<dd class="p-author h-card vcard"> <a class="p-name fn u-url url"
href="[editor1 personal URL (opt.)]" rel=author>[editor1 name]</a>, <a
class="p-org org h-org"
href="[affiliation/co. home page (opt.)]">[affiliation (opt.)]</a>,
<span class="u-email email">[email address (opt.)]</span>
<dd class="p-author h-card vcard"> <span class="p-name fn">[editor2
name]</span>, <span class="p-org org">[affiliation (opt.)]</span>, <span
class="u-email email">[email address (opt.)]</span>
</dl>
<!--begin-copyright-->
<p class=copyright><a
href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright"
rel=license>Copyright</a> © 2014 <a href="http://www.w3.org/"><abbr
title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup> (<a
href="http://www.csail.mit.edu/"><abbr
title="Massachusetts Institute of Technology">MIT</abbr></a>, <a
href="http://www.ercim.eu/"><abbr
title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>,
<a href="http://www.keio.ac.jp/">Keio</a>, <a
href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved. W3C <a
href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
<a
href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a>
and <a
href="http://www.w3.org/Consortium/Legal/copyright-documents">document
use</a> rules apply.</p>
<!--end-copyright-->
<hr title="Separator for header">
</div>
<h2 class="no-num no-toc" id=abstract>Abstract</h2>
<p> <span class=p-summary> This module contains the features of CSS
relating to <var class=replaceme>DESCRIBE HERE</var>. </span> <a
href="http://www.w3.org/TR/CSS/">CSS</a> is a language for describing the
rendering of structured documents (such as HTML and XML) on screen, on
paper, in speech, etc.
<h2 class="no-num no-toc" id=status>Status of this document</h2>
<!--begin-status-->
<p>This is a public copy of the editors' draft. It is provided for
discussion only and may change at any moment. Its publication here does
not imply endorsement of its contents by W3C. Don't cite this document
other than as work in progress.
<p>The (<a
href="http://lists.w3.org/Archives/Public/www-style/">archived</a>) public
mailing list <a
href="mailto:www-style@w3.org?Subject=%5Bcss-module%5D%20PUT%20SUBJECT%20HERE">
www-style@w3.org</a> (see <a
href="http://www.w3.org/Mail/Request">instructions</a>) is preferred for
discussion of this specification. When sending e-mail, please put the text
“css-module” in the subject, preferably like this:
“[<!---->css-module<!---->] <em>…summary of comment…</em>”
<p>This document was produced by the <a
href="http://www.w3.org/Style/CSS/members">CSS Working Group</a> (part of
the <a href="http://www.w3.org/Style/">Style Activity</a>).
<p>This document was produced by a group operating under the <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February
2004 W3C Patent Policy</a>. W3C maintains a <a
href="http://www.w3.org/2004/01/pp-impl/32061/status"
rel=disclosure>public list of any patent disclosures</a> made in
connection with the deliverables of the group; that page also includes
instructions for disclosing a patent. An individual who has actual
knowledge of a patent which the individual believes contains <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential
Claim(s)</a> must disclose the information in accordance with <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
6 of the W3C Patent Policy</a>.</p>
<!--end-status-->
<p>The following features are at risk: …
<h2 class="no-num no-toc" id=contents> Table of Contents</h2>
<!--begin-toc-->
<ul class=toc>
<li><a href="#intro"><span class=secno>1. </span> Introduction</a>
<ul class=toc>
<li><a href="#placement"><span class=secno>1.1. </span> Module
interactions</a>
<li><a href="#values"><span class=secno>1.2. </span> Values</a>
</ul>
<li><a href="#sample-topic"><span class=secno>2. </span> Sample
section</a>
<ul class=toc>
<li><a href="#the-display-model"><span class=secno>2.1. </span> Internal
display model: the ‘<code class=property>display-inside</code>’
property</a>
</ul>
<li><a href="#conformance"><span class=secno>3. </span> Conformance</a>
<ul class=toc>
<li><a href="#conventions"><span class=secno>3.1. </span> Document
conventions</a>
<li><a href="#conformance-classes"><span class=secno>3.2. </span>
Conformance classes</a>
<li><a href="#partial"><span class=secno>3.3. </span> Partial
implementations</a>
<li><a href="#experimental"><span class=secno>3.4. </span> Experimental
implementations</a>
<li><a href="#testing"><span class=secno>3.5. </span> Non-experimental
implementations</a>
<li><a href="#cr-exit-criteria"><span class=secno>3.6. </span> CR exit
criteria</a>
</ul>
<li class=no-num><a href="#acknowledgments"> Acknowledgments</a>
<li class=no-num><a href="#references"> References</a>
<ul class=toc>
<li class=no-num><a href="#normative-references"> Normative
references</a>
<li class=no-num><a href="#other-references"> Other references</a>
</ul>
<li class=no-num><a href="#index"> Index</a>
<li class=no-num><a href="#property-index"> Property index</a>
</ul>
<!--end-toc-->
<h2 id=intro><span class=secno>1. </span> Introduction</h2>
<p><em>This section is not normative.</em>
<p><var class=replaceme>Provide background, motivation, etc.</var>
<h3 id=placement><span class=secno>1.1. </span> Module interactions</h3>
<p class=replaceme>Explain, normatively, how this module affects the
definition of CSS.
<p>This module replaces and extends the <var class=replaceme>SUMMARIZE
HERE</var> features defined in <a
href="#ref-CSS21">[CSS21]<!--{{!CSS21}}--></a> sections <var
class=replaceme>W.X and Y.Z</var>.
<p class=replaceme>All properties in this module apply to the
<code>::first-line</code> and <code>::first-letter</code> pseudo-elements.
<!-- HANDLE, THEN REMOVE THIS COMMENT
Properties that affect box layout should be excluded from ::first-line.
Properties that take things out-of-flow or alter box construction should
be excluded from both ::first-line and ::first-letter. (A special exception
is made for float on ::first-letter, which is defined to emulate drop-caps.)
Examples of ::first-line / ::first-letter statements:
http://dev.w3.org/csswg/css3-background/#placement
(All properties apply to ::first-letter; some apply to ::first-line)
-->
<h3 id=values><span class=secno>1.2. </span> Values</h3>
<p>This specification follows the <a
href="http://www.w3.org/TR/CSS21/about.html#property-defs">CSS property
definition conventions</a> from <a
href="#ref-CSS21">[CSS21]<!--{{!CSS21}}--></a>. Value types not defined in
this specification are defined in CSS Level 2 Revision 1 <a
href="#ref-CSS21">[CSS21]<!--{{!CSS21}}--></a>. Other CSS modules may
expand the definitions of these value types: for example <a
href="#ref-CSS3VAL">[CSS3VAL]<!--{{CSS3VAL}}--></a>, when combined with
this module, expands the definition of the <var><length></var> value
type as used in this specification.
<p>In addition to the property-specific values listed in their definitions,
all properties defined in this specification also accept the <a
href="http://www.w3.org/TR/CSS21/cascade.html#value-def-inherit">inherit</a>
keyword as their property value. For readability it has not been repeated
explicitly.
<h2 id=sample-topic><span class=secno>2. </span> Sample section</h2>
<p>Look at the mark-up in this section for examples. See the <a
href="https://www.w3.org/Style/Group/css3-src/bin/README">documentation</a>
for more precise instructions. The companion of this template shows the <a
href=Overview.html>processed result</a>.
<p>To refer to HTML, use <a
href="#ref-HTML40">[HTML40]<!--{{HTML40}}--></a> (note the double square
brackets). To make a normative reference, insert a “!”, like this: <a
href="#ref-CSS3SYN">[CSS3SYN]<!--{{!CSS3SYN}}--></a> The currently
available <a href="http://dev.w3.org/CSS/biblio/biblio.ref">list of
bibliographic data</a> can of course be extended.
<p>We write about a property such as ‘<code
class=property>display-model</code>’ like this and about a piece of CSS
code like this: ‘<code class=css>foo: bar</code>’. Inline HTML and XML
are similar, but use the CODE element: <code
class=html><blockquote>...</blockquote></code> and <code
class=xml><r:xyz>...</r:xyz></code>.
<p class=note>Note that the property will automatically be linked to its
definition.
<p>To put <span class=index id=terms>terms</span> into the <span
class=index-def id=index0>index</span>, there are many <span class=index
id=variants title=variant>variants</span>, but hopefully the <span
class=index id=simplest title="simple|simpler|simplest">simplest</span>
will be the most <span class=index id=common
title="frequency::common">common</span>. But a little more <span
class=index id=work title="work|resource::time spent">work</span> now will
help many people for a long time.
<p class=note>Note that you can add non-normative notes like this.
<p>Of course, multi-paragraph notes are also possible: just enclose them in
a DIV:
<div class=note>
<p>Note that this note is a multi-paragraph note.
<p>It doesn't <em>need</em> to have two paragraphs, but it could.
</div>
<p>Displayed examples come in eight different types: CSS examples that need
no separate paragraph of explanation are put in a simple PRE:
<pre class=example>EM { font-style: italic }</pre>
<p>CSS examples that need extra text need a DIV.
<div class=example>
<p>The following example is the same as the previous one, but now it is
explained:
<pre>EM { font-style: italic }</pre>
</div>
<p>Illegal CSS examples (examples of errors) are the same, but with class
"illegal example". Examples of HTML and XML code have class "html" and
"xml" respectively, but are otherwise ditto.
<p>A formal definition of a property looks like this:
<h3 id=the-display-model><span class=secno>2.1. </span> Internal display
model: the ‘<a href="#display-inside"><code
class=property>display-inside</code></a>’ property</h3>
<table class=propdef>
<tbody>
<tr>
<th>Name:
<td><dfn id=display-inside>display-inside</dfn>
<tr>
<th><a href="#values">Value</a>:
<td>inline-inside | block-inside | table | ruby | icon
<tr>
<th>Initial:
<td>text
<tr>
<th>Applies to:
<td>all elements
<tr>
<th>Inherited:
<td>no
<tr>
<th>Percentages:
<td>N/A
<tr>
<th>Media:
<td>visual
<tr>
<th>Computed value:
<td>specified value
<tr>
<th>Animatable:
<td>no
<tr>
<th>Canonical order:
<td><abbr title="follows order of property value definition">per
grammar</abbr>
</table>
<dl>
<dt><dfn id=value-name>‘<code class=css>value-name</code>’</dfn>
<dd>Define values using a DL
</dl>
<p><dfn id=cross-references>Cross-references</dfn> are created by enclosing
a term or phrase in <dfn> (like the word <a
href="#cross-references"><em>cross-references</em></a> earlier in this
sentence). Then any element with the same content will automatically be
linked. For example: <a href="#cross-references">cross-references</a>.
<p>And a figure with a caption is done like this:
<div class=figure>
<p><img
alt="A table with a caption above it; both have margins and the margins between them are collapsed, as is normal for vertical margins."
src=corner.png>
<p class=caption>Just a random image. SVG would be nice, but maybe SVG
isn't sufficiently easy to use yet. W3C prefers PNG over GIF (obviously,
since PNG is a W3C Rec).
</div>
<p>Don't forget to write the longdesc.
<p class=issue>An open issue or editorial remark is OK in a WD, but they
should be resolved/removed before the document goes to “CR” (Candidate
Recommendation). Use class=“issue”.
<h2 id=conformance><span class=secno>3. </span> Conformance</h2>
<h3 id=conventions><span class=secno>3.1. </span> Document conventions</h3>
<p>Conformance requirements are expressed with a combination of descriptive
assertions and RFC 2119 terminology. The key words “MUST”, “MUST
NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”,
“SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL” in the
normative parts of this document are to be interpreted as described in RFC
2119. However, for readability, these words do not appear in all uppercase
letters in this specification.
<p>All of the text of this specification is normative except sections
explicitly marked as non-normative, examples, and notes. <a
href="#ref-RFC2119">[RFC2119]<!--{{!RFC2119}}--></a>
<p>Examples in this specification are introduced with the words “for
example” or are set apart from the normative text with
<code>class="example"</code>, like this:
<div class=example>
<p>This is an example of an informative example.
</div>
<p>Informative notes begin with the word “Note” and are set apart from
the normative text with <code>class="note"</code>, like this:
<p class=note>Note, this is an informative note.
<h3 id=conformance-classes><span class=secno>3.2. </span> Conformance
classes</h3>
<p>Conformance to CSS TEMPLATE Module Level N is defined for three
conformance classes:
<dl>
<dt><dfn id=style-sheet title="style sheet!!as conformance class">style
sheet</dfn>
<dd>A <a href="http://www.w3.org/TR/CSS21/conform.html#style-sheet">CSS
style sheet</a>.
<dt><dfn id=renderer>renderer</dfn>
<dd>A <a href="http://www.w3.org/TR/CSS21/conform.html#user-agent">UA</a>
that interprets the semantics of a style sheet and renders documents that
use them.
<dt><dfn id=authoring-tool>authoring tool</dfn>
<dd>A <a href="http://www.w3.org/TR/CSS21/conform.html#user-agent">UA</a>
that writes a style sheet.
</dl>
<p>A style sheet is conformant to CSS TEMPLATE Module Level N if all of its
statements that use syntax defined in this module are valid according to
the generic CSS grammar and the individual grammars of each feature
defined in this module.
<p>A renderer is conformant to CSS TEMPLATE Module Level N if, in addition
to interpreting the style sheet as defined by the appropriate
specifications, it supports all the features defined by CSS TEMPLATE
Module Level N by parsing them correctly and rendering the document
accordingly. However, the inability of a UA to correctly render a document
due to limitations of the device does not make the UA non-conformant. (For
example, a UA is not required to render color on a monochrome monitor.)
<p>An authoring tool is conformant to CSS TEMPLATE Module Level N if it
writes style sheets that are syntactically correct according to the
generic CSS grammar and the individual grammars of each feature in this
module, and meet all other conformance requirements of style sheets as
described in this module.
<h3 id=partial><span class=secno>3.3. </span> Partial implementations</h3>
<p>So that authors can exploit the forward-compatible parsing rules to
assign fallback values, CSS renderers <strong>must</strong> treat as
invalid (and <a
href="http://www.w3.org/TR/CSS21/conform.html#ignore">ignore as
appropriate</a>) any at-rules, properties, property values, keywords, and
other syntactic constructs for which they have no usable level of support.
In particular, user agents <strong>must not</strong> selectively ignore
unsupported component values and honor supported values in a single
multi-value property declaration: if any value is considered invalid (as
unsupported values must be), CSS requires that the entire declaration be
ignored.
<h3 id=experimental><span class=secno>3.4. </span> Experimental
implementations</h3>
<p>To avoid clashes with future CSS features, the CSS2.1 specification
reserves a <a
href="http://www.w3.org/TR/CSS21/syndata.html#vendor-keywords">prefixed
syntax</a> for proprietary and experimental extensions to CSS.
<p>Prior to a specification reaching the Candidate Recommendation stage in
the W3C process, all implementations of a CSS feature are considered
experimental. The CSS Working Group recommends that implementations
8096
use a
vendor-prefixed syntax for such features, including those in W3C Working
Drafts. This avoids incompatibilities with future changes in the draft.
<h3 id=testing><span class=secno>3.5. </span> Non-experimental
implementations</h3>
<p>Once a specification reaches the Candidate Recommendation stage,
non-experimental implementations are possible, and implementors should
release an unprefixed implementation of any CR-level feature they can
demonstrate to be correctly implemented according to spec.
<p>To establish and maintain the interoperability of CSS across
implementations, the CSS Working Group requests that non-experimental CSS
renderers submit an implementation report (and, if necessary, the
testcases used for that implementation report) to the W3C before releasing
an unprefixed implementation of any CSS features. Testcases submitted to
W3C are subject to review and correction by the CSS Working Group.
<p>Further information on submitting testcases and implementation reports
can be found from on the CSS Working Group's website at <a
href="http://www.w3.org/Style/CSS/Test/">http://www.w3.org/Style/CSS/Test/</a>.
Questions should be directed to the <a
href="http://lists.w3.org/Archives/Public/public-css-testsuite">public-css-testsuite@w3.org</a>
mailing list.
<h3 id=cr-exit-criteria><span class=secno>3.6. </span> CR exit criteria</h3>
<p class=replaceme>Remove this section unless/until the module is in CR.</p>
<!-- This text was <a href="http://www.w3.org/Style/CSS/Tracker/actions/44"> decided on 2008-06-04.</a> -->
<p> For this specification to be advanced to Proposed Recommendation, there
must be at least two independent, interoperable implementations of each
feature. Each feature may be implemented by a different set of products,
there is no requirement that all features be implemented by a single
product. For the purposes of this criterion, we define the following
terms:
<dl>
<dt>independent
<dd>each implementation must be developed by a different party and cannot
share, reuse, or derive from code used by another qualifying
implementation. Sections of code that have no bearing on the
implementation of this specification are exempt from this requirement.
<dt>interoperable
<dd>passing the respective test case(s) in the official CSS test suite,
or, if the implementation is not a Web browser, an equivalent test. Every
relevant test in the test suite should have an equivalent test created if
such a user agent (UA) is to be used to claim interoperability. In
addition if such a UA is to be used to claim interoperability, then there
must one or more additional UAs which can also pass those equivalent
tests in the same way for the purpose of interoperability. The equivalent
tests must be made publicly available for the purposes of peer review.
<dt>implementation
<dd>a user agent which:
<ol class=inline>
<li>implements the specification.
<li>is available to the general public. The implementation may be a
shipping product or other publicly available version (i.e., beta
version, preview release, or “nightly build”). Non-shipping product
releases must have implemented the feature(s) for a period of at least
one month in order to demonstrate stability.
<li>is not experimental (i.e., a version specifically designed to pass
the test suite and is not intended for normal usage going forward).
</ol>
</dl>
<p>The specification will remain Candidate Recommendation for at least six
months.
<h2 class=no-num id=acknowledgments> Acknowledgments</h2>
<p><var class=replaceme>[acknowledgments]</var>
<h2 class=no-num id=references> References</h2>
<h3 class=no-num id=normative-references> Normative references</h3>
<!--begin-normative-->
<!-- Sorted by label -->
<dl class=bibliography><!---->
<dt id=CSS21>[CSS21]
<dd>Bert Bos; et al. <a
href="http://www.w3.org/TR/2011/REC-CSS2-20110607"><cite>Cascading Style
Sheets Level 2 Revision 1 (CSS 2.1) Specification.</cite></a> 7 June
2011. W3C Recommendation. URL: <a
href="http://www.w3.org/TR/2011/REC-CSS2-20110607">http://www.w3.org/TR/2011/REC-CSS2-20110607</a>
</dd>
<!---->
<dt id=CSS3SYN>[CSS3SYN]
<dd>Tab Atkins Jr.; Simon Sapin. <a
href="http://www.w3.org/TR/2014/CR-css-syntax-3-20140220/"><cite>CSS
Syntax Module Level 3.</cite></a> 20 February 2014. W3C Candidate
Recommendation. (Work in progress.) URL: <a
href="http://www.w3.org/TR/2014/CR-css-syntax-3-20140220/">http://www.w3.org/TR/2014/CR-css-syntax-3-20140220/</a>
</dd>
<!---->
<dt id=RFC2119>[RFC2119]
<dd>S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key
words for use in RFCs to Indicate Requirement Levels.</cite></a> Internet
RFC 2119. URL: <a
href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
</dd>
<!---->
</dl>
<!--end-normative-->
<h3 class=no-num id=other-references> Other references</h3>
<!--begin-informative-->
<!-- Sorted by label -->
1330
<dl class=bibliography><!---->
<dt id=CSS3VAL>[CSS3VAL]
<dd>Håkon Wium Lie; Tab Atkins; Elika J. Etemad. <a
href="http://www.w3.org/TR/2013/CR-css3-values-20130730/"><cite>CSS
Values and Units Module Level 3.</cite></a> 30 July 2013. W3C Candidate
Recommendation. (Work in progress.) URL: <a
href="http://www.w3.org/TR/2013/CR-css3-values-20130730/">http://www.w3.org/TR/2013/CR-css3-values-20130730/</a>
</dd>
<!---->
<dt id=HTML40>[HTML40]
<dd>Ian Jacobs; David Raggett; Arnaud Le Hors. <a
href="http://www.w3.org/TR/1998/REC-html40-19980424"><cite>HTML 4.0
Specification.</cite></a> 24 April 1998. W3C Recommendation. URL: <a
<
A091
div>
href="http://www.w3.org/TR/1998/REC-html40-19980424">http://www.w3.org/TR/1998/REC-html40-19980424</a>
</dd>
<!---->
</dl>
<!--end-informative-->
<h2 class=no-num id=index> Index</h2>
<!--begin-index-->
<ul class=indexlist>
<li>authoring tool, <a href="#authoring-tool"
title="section 3.2."><strong>3.2.</strong></a>
<li>Cross-references, <a href="#cross-references"
title="section 2.1."><strong>2.1.</strong></a>
<li>display-inside, <a href="#display-inside"
title="section 2.1."><strong>2.1.</strong></a>
<li>frequency
<ul>
<li>common, <a href="#common" title="section 2.">2.</a>
</ul>
<li>index, <a href="#index0" title="section 2."><strong>2.</strong></a>
<li>renderer, <a href="#renderer"
title="section 3.2."><strong>3.2.</strong></a>
<li>resource
<ul>
<li>time spent, <a href="#work" title="section 2.">2.</a>
</ul>
<li>simple, <a href="#simplest" title="section 2.">2.</a>
<li>simpler, <a href="#simplest" title="section 2.">2.</a>
<li>simplest, <a href="#simplest" title="section 2.">2.</a>
<li>style sheet
<ul>
<li>as conformance class, <a href="#style-sheet"
title="section 3.2."><strong>3.2.</strong></a>
</ul>
<li>terms, <a href="#terms" title="section 2.">2.</a>
<li>‘<code class=css>value-name</code>’, <a href="#value-name"
title="section 2.1."><strong>2.1.</strong></a>
<li>variant, <a href="#variants" title="section 2.">2.</a>
<li>work, <a href="#work" title="section 2.">2.</a>
</ul>
<!--end-index-->
<h2 class=no-num id=property-index> Property index</h2>
<!--begin-properties-->
<table class=proptable>
<thead>
<tr>
<th>Property
<th>Values
<th>Initial
<th>Applies to
<th>Inh.
<th>Percentages
<th>Media
<tbody>
<tr>
<th><a class=property href="#display-inside">display-inside</a>
<td>inline-inside | block-inside | table | ruby | icon
<td>text
<td>all elements
<td>no
<td>N/A
<td>visual
</table>
<!--end-properties-->
</html>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-declaration:"~/SGML/HTML4.decl"
sgml-default-doctype-name:"html"
sgml-minimize-attributes:t
sgml-nofill-elements:("pre" "style" "br")
sgml-live-element-indicator:t
sgml-omittag:nil
sgml-shorttag:nil
sgml-namecase-general:t
sgml-general-insert-case:lower
sgml-always-quote-attributes:t
sgml-indent-step:nil
sgml-indent-data:t
sgml-parent-document:nil
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
-->