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revision 1.7 by wakaba, Sun Oct 7 08:50:13 2007 UTC revision 1.11 by wakaba, Mon Oct 22 10:30:53 2007 UTC
# Line 10  Line 10 
10  <div class="header">  <div class="header">
11  <h1>Selectors Serialization Format for Testing (<abbr>SSFT</abbr>)  <h1>Selectors Serialization Format for Testing (<abbr>SSFT</abbr>)
12  Specification</h1>  Specification</h1>
13  <h2>Working Draft <time datetime=2007-10-07>7 October 2007</time></h2>  <h2>Working Draft <time datetime=2007-10-22>22 October 2007</time></h2>
14    
15  <dl class="versions-uri">  <dl class="versions-uri">
16  <dt>This Version</dt>  <dt>This Version</dt>
# Line 63  available at <code class="URI">&lt;<a Line 63  available at <code class="URI">&lt;<a
63  at the time of its publication.  Other documents  at the time of its publication.  Other documents
64  might supersede this document.</em></p>  might supersede this document.</em></p>
65    
66  <p>This document is a working draft, produced as part  <p>This document is a working draft, produced as part of the
67    <a href="http://suika.fam.cx/www/markup/html/whatpm/readme">Whatpm</a>
68    subproject
69  of the <a href="http://suika.fam.cx/www/manakai-core/doc/web/">manakai</a>  of the <a href="http://suika.fam.cx/www/manakai-core/doc/web/">manakai</a>
70  project.  It might be updated, replaced, or obsoleted by  project.  It might be updated, replaced, or obsoleted by
71  other documents at any time.  It is inappropriate to  other documents at any time.  It is inappropriate to
# Line 116  in not escaping unsafe identifiers.</p> Line 118  in not escaping unsafe identifiers.</p>
118  <div class="section" id="terminology">  <div class="section" id="terminology">
119  <h2>Terminology</h2>  <h2>Terminology</h2>
120    
121  <p>The key words <q><em class="rfc2119">MUST</em></q>,  <p>The key words <q><dfn id=must><em class="rfc2119">MUST</em></dfn></q>,
122  <q><em class="rfc2119">MUST NOT</em></q>,  <q><dfn id=must-not><em class="rfc2119">MUST NOT</em></dfn></q>,
123  <q><em class="rfc2119">SHOULD</em></q>,  <q><dfn id=should><em class="rfc2119">SHOULD</em></dfn></q>,
124  <q><em class="rfc2119">SHOULD NOT</em></q>, and  <q><dfn id=should-not><em class="rfc2119">SHOULD NOT</em></dfn></q>, and
125  <q><em class=rfc2119>MAY</em></q> in this  <q><dfn id=may><em class=rfc2119>MAY</em></dfn></q> in this
126  document are to be interpreted as described in  document are to be interpreted as described in
127  <a href="urn:ietf:rfc:2119"><abbr title="Request for Comments">RFC</abbr>  <a href="urn:ietf:rfc:2119"><abbr title="Request for Comments">RFC</abbr>
128  2119</a>  2119</a>
# Line 145  simple selector in a selector.</p> Line 147  simple selector in a selector.</p>
147  for now.</p>  for now.</p>
148  </div>  </div>
149    
150  <p><dfn id=newline title=newline>Newline</dfn> is  <p>No <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
151  <code class=char>U+000A</code> <code class=charname>LINE FEED</code>  representation is defined for an invalid group of selectors.</p>
152  <span class=ed>or U+000D U+000A or U+000A ??</span>.</p>  
153    <div class="note memo">
154    <p>The serialized representation will not contain any comment.</p>
155    </div>
156    
157  <!-- TODO: link terms to Selectors -->  <!-- TODO: link terms to Selectors -->
158    
# Line 170  a group of selectors (<dfn id=var-gs><va Line 175  a group of selectors (<dfn id=var-gs><va
175      <dl class=switch>      <dl class=switch>
176      <dt>If it is a sequence of simle selector      <dt>If it is a sequence of simle selector
177      (<dfn id=var-sss><var>sss</var></dfn>)</dt>      (<dfn id=var-sss><var>sss</var></dfn>)</dt>
178        <dd class=ed>@@</dd>        <dd>
179            <ol>
180            <li class=ed><a href="#algorithm-serialize-a-simple-selector">Serialize
181            each simple selector</a> in <var>sss</var>.</li>
182            <li class=ed>sort</li>
183            <li>Append a <a href="#newline">newline</a> to <var>result</var>.</li>
184            </ol>
185          </dd>
186      <dt>If it is a combinator (<dfn id=var-c><var>c</var></dfn>)</dt>      <dt>If it is a combinator (<dfn id=var-c><var>c</var></dfn>)</dt>
187        <dd>        <dd>
188          <ol>          <ol>
# Line 208  a group of selectors (<dfn id=var-gs><va Line 220  a group of selectors (<dfn id=var-gs><va
220    </ol>    </ol>
221  </li>  </li>
222  <li>Then, <var>result</var> is the  <li>Then, <var>result</var> is the
223  <abbr title="Selectors Serialization Format for Testing">SFFT</abbr>  <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
224  representation of the group of selectors.</li>  representation of <var>gs</var>.</li>
225  </ol>  </ol>
226    
227  <p>To  <p>To
# Line 240  a simple selector (<dfn><var id=var-ss>s Line 252  a simple selector (<dfn><var id=var-ss>s
252        </dl>        </dl>
253      </li>      </li>
254      <li>If <var>ss</var> is a type selector, append the      <li>If <var>ss</var> is a type selector, append the
255      <span class=ed>@@ normalized</span> local name to <var>result</var>.</li>      <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
256        local name to <var>result</var>.</li>
257      <li>If <var>ss</var> is a universal selector, append      <li>If <var>ss</var> is a universal selector, append
258      a <code class=char>U+002A</code> <code class=charname>ASTERISK</code>      a <code class=char>U+002A</code> <code class=charname>ASTERISK</code>
259      (<code class=char>*</code>) character to <var>result</var>.</li>      (<code class=char>*</code>) character to <var>result</var>.</li>
260      </ol>      </ol>
261    </dd>    </dd>
262  <dt>If <var>ss</var> is an attribute selector</dt>  <dt>If <var>ss</var> is an attribute selector</dt>
263    <dd class=ed>@@</dd>    <dd>
264        <ol>
265        <li>Append a <code class=char>U+005B</code> <code class=charname>LEFT
266        SQUARE BRACKET</code> (<code class=char>[</code>) to
267        <var>result</var>.</li>
268        <li>
269          Append a namespace prefix as following:
270          <dl>
271          <dt>If a namespace URI is specified</dt>
272            <dd class=ed>@@</dd>
273            <dd class=ed>@@ Current reference implementation is wrong,
274            since its result of sorting depends on namespace prefix.</dd>
275          <dt>If the null namespace is specified</dt>
276            <dd>Append a <code class=char>U+007C</code>
277            <code class=charname>VERTICAL BAR</code> character to
278            <var>result</var>.</dd>
279          <dt>If no namespace is specified</dt>
280            <dd>Append a <code class=char>U+002A</code>
281            <code class=charname>ASTERISK</code> (<code class=char>*</code>)
282            character, followed by a <code class=char>U+007C</code>
283            <code class=charname>VERTICAL BAR</code> (<code class=char>|</code>)
284            character, to <var>result</var>.</dd>
285          </dl>
286        </li>
287        <li>Append the
288        <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
289        local name to <var>result</var>.</li>
290        <li>If a value is specified in <var>ss</var>:
291          <ol>
292          <li>Depending on the way to match, append <code>=</code>,
293          <code>~=</code>, <code>|=</code>, <code>^=</code>,
294          <code>$=</code>, or <code>*=</code> to <var>result</var>.</li>
295          <li>Append the
296          <a href="#algorithm-normalize-a-string" title="normalize a string">normalized</a>
297          value to <var>result</var>.</li>
298          </ol>
299        </li>
300        <li>Append a <code class=char>U+005D</code> <code class=charname>RIGHT
301        SQUARE BRACKET</code> (<code class=char>]</code>) to
302        <var>result</var>.</li>
303        </ol>
304      </dd>
305  <dt>If <var>ss</var> is a class selector</dt>  <dt>If <var>ss</var> is a class selector</dt>
306    <dd>Append a <code class=char>U+002E</code> <code class=charname>FULL    <dd>Append a <code class=char>U+002E</code> <code class=charname>FULL
307    STOP</code> (<code class=char>.</code>) character, followed    STOP</code> (<code class=char>.</code>) character, followed
308    by <span class=ed>@@ normalized</span> class name,    by <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
309    <var>result</var>.</dd>    class name, <var>result</var>.</dd>
310  <dt>If <var>ss</var> is an <abbr>ID</abbr> selector</dt>  <dt>If <var>ss</var> is an <abbr>ID</abbr> selector</dt>
311    <dd>Append a <code class=char>U+0023</code> <code class=charname>NUMBER    <dd>Append a <code class=char>U+0023</code> <code class=charname>NUMBER
312    SIGN</code> (<code class=char>#</code>) character, followed    SIGN</code> (<code class=char>#</code>) character, followed
313    by <span class=ed>@@ normalized</span> <abbr>ID</abbr>,    by <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
314    to <var>result</var>.</dd>    <abbr>ID</abbr>, to <var>result</var>.</dd>
315  <dt>If <var>ss</var> is a pseudo$B!>(Bclass selector</dt>  <dt>If <var>ss</var> is a pseudo$B!>(Bclass selector</dt>
316    <dd>    <dd>
317      <ol>      <ol>
318      <li>Append a <code class=char>U+003A</code>      <li>Append a <code class=char>U+003A</code>
319      <code class=charname>COLON</code> (<code class=char>:</code>) character      <code class=charname>COLON</code> (<code class=char>:</code>) character
320      to <var>result</var>.</li>      to <var>result</var>.</li>
321      <li>Append <span class=ed>@@ normalized</span>      <li>Append the
322      pseudo$B!>(Bclass name to <var>result</var>.</li>      <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
323        name of the pseudo$B!>(Bclass to <var>result</var>.</li>
324      <li>Append any arguments as following:      <li>Append any arguments as following:
325        <dl class=switch>        <dl class=switch>
326        <dt>If pseudo$B!>(Bclass name is <code>lang</code></dt>        <dt>If the name of the pseudo$B!>(Bclass is <code>lang</code></dt>
327          <dd>          <dd>
328            <ol>            <ol>
329            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT
330            PARENTHESIS</code> (<code class=char>(</code>) character            PARENTHESIS</code> (<code class=char>(</code>) character
331            to <var>result</var>.</li>            to <var>result</var>.</li>
332            <li>Append <span class=ed>@@ normalized</span>            <li>Append the
333              <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
334            language tag (the argument) to <var>result</var>.</li>            language tag (the argument) to <var>result</var>.</li>
335            <li>Append a <code class=char>U+0029</code>            <li>Append a <code class=char>U+0029</code>
336            <code class=charname>RIGHT PARENTHESIS</code>            <code class=charname>RIGHT PARENTHESIS</code>
# Line 282  a simple selector (<dfn><var id=var-ss>s Line 338  a simple selector (<dfn><var id=var-ss>s
338            to <var>result</var>.</li>            to <var>result</var>.</li>
339            </ol>            </ol>
340          </dd>          </dd>
341        <dt>If pseudo$B!>(Bclass name is <code>-manakai-contains</code></dt>        <dt>If the name of the pseudo$B!>(Bclass is
342          <code>-manakai-contains</code></dt>
343          <dd>          <dd>
344            <ol>            <ol>
345            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT
346            PARENTHESIS</code> (<code class=char>(</code>) character            PARENTHESIS</code> (<code class=char>(</code>) character
347            to <var>result</var>.</li>            to <var>result</var>.</li>
348            <li>Append <span class=ed>@@ normalized</span>            <li>Append the
349              <a href="#algorithm-normalize-a-string" title="normalize a string">normalized</a>
350            string (the argument) to <var>result</var>.</li>            string (the argument) to <var>result</var>.</li>
351            <li>Append a <code class=char>U+0029</code>            <li>Append a <code class=char>U+0029</code>
352            <code class=charname>RIGHT PARENTHESIS</code>            <code class=charname>RIGHT PARENTHESIS</code>
# Line 296  a simple selector (<dfn><var id=var-ss>s Line 354  a simple selector (<dfn><var id=var-ss>s
354            to <var>result</var>.</li>            to <var>result</var>.</li>
355            </ol>            </ol>
356          </dd>          </dd>
357        <dt>If pseudo$B!>(Bclass name is <code>nth-child</code>,        <dt>If name of the pseudo$B!>(Bclass is either <code>nth-child</code>,
358        <code>nth-last-child</code>, <code>nth-of-type</code>, or        <code>nth-last-child</code>, <code>nth-of-type</code>, or
359        <code>nth-last-of-type</code></dt>        <code>nth-last-of-type</code></dt>
360          <dd>          <dd>
# Line 338  a simple selector (<dfn><var id=var-ss>s Line 396  a simple selector (<dfn><var id=var-ss>s
396            to <var>result</var>.</li>            to <var>result</var>.</li>
397            </ol>            </ol>
398          </dd>          </dd>
399        <dt>If pseudo$B!>(Bclass name is <code>not</code></dt>        <dt>If the name of the pseudo$B!>(Bclass is <code>not</code></dt>
400          <dd class=ed>@@</dd>          <dd>
401              <ol>
402                <li>Append a string of <code class=char>U+003A</code>
403                <code class=charname>COLON</code>, <code class=char>U+006E</code>
404                <code class=charname>LATIN SMALL LETTER N</code>,
405                <code class=char>U+006F</code> <code class=charname>LATIN
406                SMALL LETTER O</code>, <code class=char>U+0074</code>
407                <code class=charname>LATIN SMALL LETTER T</code>, and
408                <code class=char>U+0028</code> <code class=charname>LEFT
409                PARENTHESIS</code> (<code>:not(</code>), followed by a
410                <a href="#newline">newline</a>, to <var>result</var>.</li>
411                <li>Append four <code class=char>U+0020</code>
412                <code class=charname>SPACE</code> characters to
413                <var>result</var>.</li>
414                <li>Append four <code class=char>U+0020</code>
415                <code class=charname>SPACE</code> characters to
416                <var>result</var> again.</li>
417                <li><a href="#algorithm-serialize-a-simple-selector">Serialize
418                the simple selector specified as the argument to the
419                <code>not</code> pseudo$B!>(Bclass</a>.</li>
420                <li>Append a <a href="#newline">newline</a> to
421                <var>result</var>.</li>
422                <li>Append four <code class=char>U+0020</code>
423                <code class=charname>SPACE</code> characters to
424                <var>result</var>.</li>
425                <li>Append a <code class=char>U+0029</code>
426                <code class=charname>RIGHT PARENTHESIS</code>
427                (<code class=char>)</code>) character
428                to <var>result</var>.</li>
429              </ol>
430            </dd>
431        </dl>        </dl>
432      </li>      </li>
433      </ol>      </ol>
# Line 350  a simple selector (<dfn><var id=var-ss>s Line 438  a simple selector (<dfn><var id=var-ss>s
438      <li>Append two <code class=char>U+003A</code>      <li>Append two <code class=char>U+003A</code>
439      <code class=charname>COLON</code> characters (<code>::</code>)      <code class=charname>COLON</code> characters (<code>::</code>)
440      to <var>result</var>.</li>      to <var>result</var>.</li>
441      <li>Append <span class=ed>@@ normalized</span>      <li>Append the
442      pseudo$B!>(Belement name to <var>result</var>.</li>      <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
443        name of the pseudo$B!>(Belement to <var>result</var>.</li>
444      <!-- For future version: append "(", arguments, ")", if any. -->      <!-- For future version: append "(", arguments, ")", if any. -->
445      </ol>      </ol>
446    </dd>    </dd>
447  </dl>  </dl>
448    
449    <p>To <dfn id=algorithm-normalize-an-ident title="normalize an IDENT">normalize
450    an <code>IDENT</code> (<dfn id=var-n><var>n</var></dfn>)</dfn>:</p>
451    <ol>
452    <li>Replace the escape sequences (<code>\</code> and following
453    characters) in <var>n</var> by characters represented by them
454    respectively.</li>
455    <li>If there is any character that is <em>not</em> one of
456    <code class=char>U+002D</code> <code class=charname>HYPHEN-MINUS</code>
457    (<code class=char>-</code>), <code class=char>U+0030</code>
458    <code class=charname>DIGIT ZERO</code>
459    (<code class=char>0</code>) to <code class=char>U+0039</code>
460    <code class=charname>DIGIT NINE</code> (<code class=char>9</code>),
461    <code class=char>U+0041</code> <code class=charname>LATIN CAPITAL LETTER
462    A</code> (<code class=char>A</code>) to <code class=char>U+005A</code>
463    <code class=charname>LATIN CAPITAL LETTER Z</code> (<code class=char>Z</code>),
464    <code class=char>U+005F</code> <code class=charname>LOW LINE</code>
465    (<code class=char>_</code>), <code class=char>U+0061</code>
466    <code class=charname>LATIN SMALL LETTER A</code>
467    (<code class=char>a</code>) to <code class=char>U+006A</code>
468    <code class=charname>LATIN SMALL LETTER Z</code> (<code class=char>z</code>),
469    <code class=char>U+0080</code> to <code class=char>U+D7FF</code>, or
470    <code class=char>U+E000</code> to <code class=char>U+10FFFF</code> in
471    <var>n</var>, then replace it by string <code>\<var>HHHHHH</var></code>, where
472    <dfn id=var-HHHHHH><var>HHHHHH</var></dfn> is the upper$B!>(Bcase zero$B!>(Bpadded
473    hexadecimal representation of the character.  If the character
474    is outside the range of <code>[<code class=char>U+0000</code>,
475    <code class=char>U+10FFFF</code>]</code>, <var>HHHHHH</var>
476    <em class=rfc2119>MUST</em> be <code>FFFFFF</code>.</li>
477    <li>If the first character in <var>n</var> is one of
478    <code class=char>U+0030</code> <code class=charname>DIGIT ZERO</code>
479    (<code class=char>0</code>) to <code class=char>U+0039</code>
480    <code class=charname>DIGIT NINE</code> (<code class=char>9</code>),
481    then prepend a string <code>\00003</code> at the beginning of
482    <var>n</var>.</li>
483    <li>If the first character in <var>n</var> is <code class=char>U+002D</code>
484    <code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>) and
485    the second character, if any, is <em>not</em> one of
486    <code class=char>U+0041</code> <code class=charname>LATIN CAPITAL LETTER
487    A</code> (<code class=char>A</code>) to <code class=char>U+005A</code>
488    <code class=charname>LATIN CAPITAL LETTER Z</code> (<code class=char>Z</code>),
489    <code class=char>U+005F</code> <code class=charname>LOW LINE</code>
490    (<code class=char>_</code>), <code class=char>U+0061</code>
491    <code class=charname>LATIN SMALL LETTER A</code>
492    (<code class=char>a</code>) to <code class=char>U+006A</code>
493    <code class=charname>LATIN SMALL LETTER Z</code> (<code class=char>z</code>),
494    <code>U+0080</code> to <code>U+D7FF</code>, or
495    <code>U+E000</code> to <code>U+10FFFF</code>, or
496    <var>n</var> is equal to <code class=char>U+002D</code>
497    <code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>), then
498    replace the <code class=char>U+002D</code>
499    <code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>)
500    character by string <code>\00002D</code>.</li>
501    <li>Then, <var>n</var> is the result of the algorithm.</li>
502    </ol>
503    
504    <p>To <dfn id=algorithm-normalize-a-string title="normalize a STRING">normalize
505    a <code>STRING</code> (<dfn id=var-s><var>s</var></dfn>)</dfn>:</p>
506    <ol>
507    <li>Replace the escape sequences (<code>\</code> and following
508    characters) in <var>s</var> by characters represented by them
509    (or an empty string if <code>\</code> is immediately followed by
510    newline character(s)) respectively.</li>
511    <li>Remove the quotation characters in <var>s</var>
512    if <var>s</var> is a <code>STRING</code>.</li>
513    <li>If there is any character that is <em>not</em> one of
514    <code class=char>U+0020</code> <code class=charname>SPACE</code>,
515    <code class=char>U+0021</code> <code class=charname>EXCLAMATION MARK</code>
516    (<code class=char>!</code>), <code class=char>U+0023</code>
517    <code class=charname>NUMBER SIGN</code> (<code class=char>#</code>) to
518    <code class=char>U+005B</code> <code class=charname>LEFT SQUARE
519    BRACKET</code>, <code class=char>U+005D</code> <code class=charname>RIGHT
520    SQUARE BRACKET</code> to <code class=char>U+D7FF</code>, or
521    <code class=char>U+E000</code> to <code class=char>U+10FFFF</code> in
522    <var>s</var>, then replace it by string <code>\<var>HHHHHH</var></code>, where
523    <dfn id=var-HHHHHH><var>HHHHHH</var></dfn> is the upper$B!>(Bcase zero$B!>(Bpadded
524    hexadecimal representation of the character.  If the character
525    is outside the range of <code>[<code class=char>U+0000</code>,
526    <code class=char>U+10FFFF</code>]</code>, <var>HHHHHH</var>
527    <em class=rfc2119>MUST</em> be <code>FFFFFF</code>.</li>
528    <li>Insert a <code class=char>U+0022</code> <code class=charname>QUOTATION
529    MARK</code> (<code class=char>"</code>) at the beginning of <var>s</var>.</li>
530    <li>Insert a <code class=char>U+0022</code> <code class=charname>QUOTATION
531    MARK</code> (<code class=char>"</code>) at the end of <var>s</var>.</li>
532    <li>Then, <var>s</var> is the result of the algorithm.</li>
533    </ol>
534    
535    <p>A <dfn id=newline title=newline>newline</dfn>
536    <em class=rfc2119>SHOULD</em> be represented as a
537    <code class=char>U+000A</code> <code class=charname>LINE FEED</code>
538    character.  However, depending on the context where
539    the <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
540    representation is in use, a sequence of
541    <code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code>
542    followed by a <code class=char>U+000A</code>
543    <code class=charname>LINE FEED</code> (i.e. a
544    <code>CRLF</code> sequence) or a character
545    <code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code>
546    <em class=rfc2119>MAY</em> be used as a <a href="#newline">newline</a> instead.
547    <a href="#newline">Newline</a> representations
548    <em class=rfc2119>SHOULD</em> be consistent in an
549    <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
550    representation.</p>
551    
552    <div class="note memo">
553    <p>Therefore, newlines must be normalized before
554    <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
555    representations are literally compared.</p>
556    </div>
557    
558  </div>  </div>
559    
560  <div class="section" id="parsing">  <div class="section" id="parsing">
561  <h2>Parsing  <h2>Parsing
562  <abbr title="Selectors Serialization Format for Testing">SFFT</abbr>  <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
563  Groups of Selectors</h2>  Groups of Selectors</h2>
564    
565  <p>Since <a href="#serializing">the serializing algorithm</a> is  <p>Since <a href="#serializing">the serializing algorithm</a> is
566  so designed that it always output a valid  so designed that it always output a valid
567  <a href="http://www.w3.org/TR/css3-selectors/#grouping">group of  <a href="http://www.w3.org/TR/css3-selectors/#grouping">group of
568  selectors</a>, no special parser for  selectors</a>, no special parser for the
569  <abbr title="Selectors Serialization Format for Testing">SFFT</abbr>  <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
570  is necessary.  Any conforming  representation is necessary.  Any conforming parser for
571  <a href="http://www.w3.org/TR/css3-selectors/#grouping">group of  <a href="http://www.w3.org/TR/css3-selectors/#grouping">groups of
572  selectors</a> parser <em class=rfc2119>MAY</em> be used  selectors</a> <em class=rfc2119>MAY</em> be used
573  to parse <abbr title="Selectors Serialization Format for Testing">SFFT</abbr>  to parse <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
574  groups of selectors.</p>  representations of groups of selectors.</p>
575  </div>  </div>
576    
577  <div class="section" id="examples">  <div class="section" id="examples">
# Line 451  by choosing <q>Selectors</q> radio butto Line 649  by choosing <q>Selectors</q> radio butto
649    <code class=URI>&lt;<a href="http://dev.w3.org/2006/webapi/selectors-api/Overview.html">http://dev.w3.org/2006/webapi/selectors-api/Overview.html</a>></code>.    <code class=URI>&lt;<a href="http://dev.w3.org/2006/webapi/selectors-api/Overview.html">http://dev.w3.org/2006/webapi/selectors-api/Overview.html</a>></code>.
650    The latest published version of the specification is available at    The latest published version of the specification is available at
651    <code class=URI>&lt;<a href="http://www.w3.org/TR/selectors-api/">http://www.w3.org/TR/selectors-api/</a>></code>.</dd>    <code class=URI>&lt;<a href="http://www.w3.org/TR/selectors-api/">http://www.w3.org/TR/selectors-api/</a>></code>.</dd>
652  <dt id=XBL2>XBL2</dt>  <dt id=ref-XBL2>XBL2</dt>
653    <dd><cite><a href="http://www.mozilla.org/projects/xbl/xbl2.html"><abbr>XBL</abbr>    <dd><cite><a href="http://www.mozilla.org/projects/xbl/xbl2.html"><abbr>XBL</abbr>
654    2.0</a></cite>, Mozilla.org, <time datetime=2007-03-15>15 Mar 2007</time>.    2.0</a></cite>, Mozilla.org, <time datetime=2007-03-15>15 Mar 2007</time>.
655    Work in progress.  The latest    Work in progress.  The latest
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