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revision 1.13 by wakaba, Wed Nov 7 11:29:46 2007 UTC revision 1.14 by wakaba, Wed Nov 7 12:20:44 2007 UTC
# Line 34  Web Document Conformance Checker (BETA)< Line 34  Web Document Conformance Checker (BETA)<
34    
35  <div class="section tokenize-error" id="bare-ero"><h3>The <code>&amp;</code> character must  <div class="section tokenize-error" id="bare-ero"><h3>The <code>&amp;</code> character must
36    introduce a reference.</h3>    introduce a reference.</h3>
37      <p>An <code>&amp;</code> (<code>U+0026</code>      <p>An <code>&amp;</code> character which
     <code class="charname">AMPERSAND</code>) character which  
38      is not part of any reference appears in the input stream.      is not part of any reference appears in the input stream.
39      The document is non-conforming.</p>      The document is non‐conforming.</p>
40    
41      <p><strong>Any <code>&amp;</code> character in URI (or IRI)      <p><em>Any <code>&amp;</code> character in URI (or IRI)
42      must be escaped as <code>&amp;amp;</code>.</strong></p>      must be escaped as <code class="example">&amp;amp;</code>.</em></p>
43    
44      <p>The <code>&amp;</code> character must      <p>The <code>&amp;</code> character must
45      be the first character of a reference:      be the first character of a reference:
46        <dl>        <dl class="switch">
47        <dt>Named entity reference</dt>        <dt>Named entity reference</dt>
48            <dd><pre class="html example">            <dd><pre class="html example">
49  <code>&amp;<var>entity-name</var>;</code></pre>  <code>&amp;<var>entity-name</var>;</code></pre>
# Line 114  Web Document Conformance Checker (BETA)< Line 113  Web Document Conformance Checker (BETA)<
113    
114      <p>The string <code>&amp;#</code> must be the first two characters      <p>The string <code>&amp;#</code> must be the first two characters
115      of a reference:      of a reference:
116        <dl>        <dl class="switch">
117        <dt>Numeric character reference</dt>        <dt>Numeric character reference</dt>
118            <dd><pre class="html example">            <dd><pre class="html example">
119  <code>&amp;#<var>d</var>;</code></pre>  <code>&amp;#<var>d</var>;</code></pre>
# Line 166  Web Document Conformance Checker (BETA)< Line 165  Web Document Conformance Checker (BETA)<
165    
166      <dl class="switch">      <dl class="switch">
167      <dt>Comments</dt>      <dt>Comments</dt>
168        <dd>In HTML documents, comments must be introduced by        <dd>In HTML document, comments must be introduced by
169        <code>&lt;!--</code> (<code>&lt;!</code> <em>immediately</em> followed        <code class="example">&lt;!--</code> (<code>&lt;!</code>
170          <em>immediately</em> followed
171        by <em>two</em> <code>-</code>s) and must be terminated by        by <em>two</em> <code>-</code>s) and must be terminated by
172        <code>--&gt;</code>.  Strings <code>&lt;!</code> not followed        <code class="example">--&gt;</code>.
173          Strings <code>&lt;!</code> not followed
174        by <code>--</code> and <code>&lt;!-</code> not followed by        by <code>--</code> and <code>&lt;!-</code> not followed by
175        <code>-</code> are not valid open delimiters for comments.</dd>        <code>-</code> are not valid open delimiters for comments.</dd>
176      <dt>Marked sections, including <code>CDATA</code> sections</dt>      <dt>Marked sections, including <code>CDATA</code> sections</dt>
177        <dd>Marked sections are not allowed in HTML documents.</dd>        <dd>Marked sections are not allowed in HTML document.</dd>
178      <dt>Markup declarations</dt>      <dt>Markup declarations</dt>
179        <dd>Markup declarations, except <code>DOCTYPE</code>        <dd>Markup declarations, except for <code>DOCTYPE</code>
180        and comment declarations, are not allowed in HTML documents.</dd>        and comment declarations, are not allowed in HTML document.</dd>
181      <dt>String <code>&lt;!</code></dt>      <dt>String <code>&lt;!</code></dt>
182        <dd>String <code>&lt;!</code> must be escaped as        <dd>String <code>&lt;!</code> must be escaped as
183        <code>&amp;lt;!</code>.</dd>        <code class="example">&amp;lt;!</code>.</dd>
184      </dl>      </dl>
185    </div>    </div>
186    
# Line 239  Web Document Conformance Checker (BETA)< Line 240  Web Document Conformance Checker (BETA)<
240      <dt><code>&lt;script/&gt;</code></dt>      <dt><code>&lt;script/&gt;</code></dt>
241          <dd><p>The polytheistic slash cannot be used for <code>script</code>          <dd><p>The polytheistic slash cannot be used for <code>script</code>
242          element.  Even for an empty <code>script</code> element,          element.  Even for an empty <code>script</code> element,
243          there must be an explicit end tag <code>&lt;/script&gt;</code>.</p>          there must be an explicit end tag
244            <code class="html example">&lt;/script&gt;</code>.</p>
245    
246          <p><strong>NOTE</strong>: Though some user agents interpret          <p><strong>NOTE</strong>: Though some user agents interpret
247          polytheistic slash for <code>script</code> element as the          polytheistic slash for <code>script</code> element as the
# Line 256  Web Document Conformance Checker (BETA)< Line 258  Web Document Conformance Checker (BETA)<
258          to allow polytheistic slash for these elements.</dd>          to allow polytheistic slash for these elements.</dd>
259      <dt><code>&lt;a/&gt;</code>, <code>&lt;p/&gt;</code></dt>      <dt><code>&lt;a/&gt;</code>, <code>&lt;p/&gt;</code></dt>
260          <dd>These elements are not always empty and therefore          <dd>These elements are not always empty and therefore
261          polytheistic slash is not allowed.</dd>          polytheistic slash is not allowed.  Use explicit end tag
262            to represent empty element as:
263              <pre class="example html">
264    <code>&lt;p&gt;&lt;/p&gt;</code></pre>
265            </dd>
266      </dl>      </dl>
267    
268      <p>Note that, unlike in XML, the polytheistic slash has      <p>Note that, unlike in XML, the polytheistic slash has
# Line 277  Web Document Conformance Checker (BETA)< Line 283  Web Document Conformance Checker (BETA)<
283        <dd>An <abbr>XBL</abbr> binding cannot be associated by        <dd>An <abbr>XBL</abbr> binding cannot be associated by
284        <abbr title="processing instruction">PI</abbr> in <abbr>HTML</abbr>        <abbr title="processing instruction">PI</abbr> in <abbr>HTML</abbr>
285        document.  Use <code>binding</code> property in <abbr>CSS</abbr>        document.  Use <code>binding</code> property in <abbr>CSS</abbr>
286        style sheet.</dd>        style sheet as:
287            <pre class="html example">
288    <code>&lt;style&gt;
289    p {
290      binding: url(binding.xbl);
291    }
292    &lt;/style&gt;</code></pre>
293          </dd>
294      <dt><code>&lt;?xml?&gt;</code> (XML declaration)</dt>      <dt><code>&lt;?xml?&gt;</code> (XML declaration)</dt>
295          <dd>XML declaration is unnecessary for HTML documents.</dd>          <dd>XML declaration is unnecessary for HTML documents.</dd>
296      <dt><code>&lt;?xml-stylesheet?&gt;</code> (XML style sheet      <dt><code>&lt;?xml-stylesheet?&gt;</code> (XML style sheet
# Line 285  Web Document Conformance Checker (BETA)< Line 298  Web Document Conformance Checker (BETA)<
298          <dd>Use HTML <code>link</code> element with <code>rel</code>          <dd>Use HTML <code>link</code> element with <code>rel</code>
299          attribute set to <code>stylesheet</code> (or,          attribute set to <code>stylesheet</code> (or,
300          <code>alternate stylesheet</code> for an alternate style          <code>alternate stylesheet</code> for an alternate style
301          sheet).</dd>          sheet).
302              <pre class="example html">
303    <code>&lt;link rel=stylesheet href=&quot;path/to/stylesheet.css&quot;&gt;</code></pre>
304            </dd>
305      <dt><code>&lt;?php?&gt;</code> or      <dt><code>&lt;?php?&gt;</code> or
306      <code>&lt;? <var>... <abbr>PHP</abbr> code ...</var> ?&gt;</code>      <code>&lt;? <var>... <abbr>PHP</abbr> code ...</var> ?&gt;</code>
307      (<abbr>PHP</abbr> code)</dt>      (<abbr>PHP</abbr> code)</dt>
# Line 425  Web Document Conformance Checker (BETA)< Line 441  Web Document Conformance Checker (BETA)<
441        <dd>Though the element is void in earlier versions of Safari,        <dd>Though the element is void in earlier versions of Safari,
442        the <code>canvas</code> element is <em>no</em> longer        the <code>canvas</code> element is <em>no</em> longer
443        defined as empty.  There must be an end tag        defined as empty.  There must be an end tag
444        <code>&lt;/canvas&gt;</code>.</dd>        <code class="html example">&lt;/canvas&gt;</code>.</dd>
445      </dl>      </dl>
446    
447      <p>Note that misnesting tags, such as      <p>Note that misnesting tags, such as
# Line 451  Web Document Conformance Checker (BETA)< Line 467  Web Document Conformance Checker (BETA)<
467    HTML.</h3>    HTML.</h3>
468      <p>The document contains a <code>DOCTYPE</code> declaration      <p>The document contains a <code>DOCTYPE</code> declaration
469      that is different from HTML5 <code>DOCTYPE</code> (i.e.      that is different from HTML5 <code>DOCTYPE</code> (i.e.
470      <code>&lt;!DOCTYPE HTML&gt;</code>).  The document is non-conforming.</p>      <code class="example html">&lt;!DOCTYPE HTML&gt;</code>).
471        The document is non‐conforming.</p>
472    
473      <p>The document might or might not be conformant to      <p>The document might or might not be conformant to
474      some version of HTML.  However, conformance to any HTML      some version of HTML.  However, conformance to any HTML
# Line 563  Web Document Conformance Checker (BETA)< Line 580  Web Document Conformance Checker (BETA)<
580                    block-level content, any inline-level content must be                    block-level content, any inline-level content must be
581                    put in e.g. paragraph element such as <code>p</code>.</p>                    put in e.g. paragraph element such as <code>p</code>.</p>
582                    <p>For example, an HTML document fragment                    <p>For example, an HTML document fragment
583                    <code class="bad example">&lt;div&gt;&lt;p&gt;Hello!&lt;/p&gt; World!&lt;/div&gt;</code>                    <code class="html bad example">&lt;div&gt;&lt;p&gt;Hello!&lt;/p&gt; World!&lt;/div&gt;</code>
584                    is non-conforming, since a word <q>World!</q> does not belong                    is non-conforming, since a word <q>World!</q> does not belong
585                    to any paragraph.  (If not part of any paragraph, what is                    to any paragraph.  (If not part of any paragraph, what is
586                    it!?)  A conforming example would be:                    it!?)  A conforming example would be:
587                      <pre class="example">                      <pre class="html example">
588  <code>&lt;div&gt;&lt;p&gt;Hello!&lt;/p&gt; &lt;p&gt;World!&lt;/p&gt;&lt;/div&gt;</code></pre>  <code>&lt;div&gt;&lt;p&gt;Hello!&lt;/p&gt; &lt;p&gt;World!&lt;/p&gt;&lt;/div&gt;</code></pre>
589                    </p></dd>                    </p></dd>
590                <dt>If the parent element does <em>not</em> allow                <dt>If the parent element does <em>not</em> allow
# Line 608  Web Document Conformance Checker (BETA)< Line 625  Web Document Conformance Checker (BETA)<
625    
626      <dl class="switch">      <dl class="switch">
627      <dt><code>html</code> element in an XHTML document</dt>      <dt><code>html</code> element in an XHTML document</dt>
628          <dd><p>In an XHTML document, the root <code>html</code>          <dd><p>In <abbr>XHTML</abbr> document, the root <code>html</code>
629          element must have an <code>xmlns</code> attribute          element must have an <code>xmlns</code> attribute as:
630          whose value is set to            <pre class="xml example">
631          <code>http://www.w3.org/1999/xhtml</code>.</p></dd>  <code>&lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;</code></pre></p></dd>
632      <dt><code>rss</code> element</dt>      <dt><code>rss</code> element</dt>
633          <dd><p>The document is written in some version of RSS.</p>          <dd><p>The document is written in some version of RSS.</p>
634          <p>The conformance checker does not support any version          <p>The conformance checker does not support any version
635          of RSS.  Use Atom 1.0 for feed documents.</p></dd>          of RSS.  Use Atom 1.0 for feed documents.</p></dd>
636      <dt><code>feed</code> element</dt>      <dt><code>feed</code> element</dt>
637          <dd><p>The Atom <code>feed</code> element must be          <dd><p>The Atom <code>feed</code> element must be
638          in the <code>http://www.w3.org/2004/Atom</code>          in the <code>http://www.w3.org/2005/Atom</code>
639          namespace.</p>          namespace as:
640              <pre class="xml example">
641    <code>&lt;feed xmlns=&quot;http://www.w3.org/2005/Atom&quot;&gt;</code></pre>
642            </p>
643          <p>The conformance checker does not support Atom 0.3.          <p>The conformance checker does not support Atom 0.3.
644          Use Atom 1.0 for feed documents.</p></dd>          Use Atom 1.0 for feed documents.</p></dd>
645      </dl>      </dl>
# Line 744  Web Document Conformance Checker (BETA)< Line 764  Web Document Conformance Checker (BETA)<
764    
765      <dl>      <dl>
766      <dt>HTML <code>meta</code> element, <code>http-equiv</code> attribute</dt>      <dt>HTML <code>meta</code> element, <code>http-equiv</code> attribute</dt>
767          <dd><p>Only <code>Default-Style</code> and <code>Refresh</code>          <dd><p>Only values <code>Default-Style</code> and <code>Refresh</code>
768          is allowed.</p>          are allowed.</p>
769          <p>Value <code>Content-Type</code> is obsolete; for charset          <p>Value <code>Content-Type</code> is obsolete; for charset
770          declaration, the <code>charset</code> attribute can be used as:          declaration, the <code>charset</code> attribute can be used as:
771          <pre class="html example">          <pre class="html example">
# Line 764  Web Document Conformance Checker (BETA)< Line 784  Web Document Conformance Checker (BETA)<
784    </div>    </div>
785    
786  <div class="section attribute-value-error" id="enumerated:invalid:http-equiv:content-type"><h3>Charset declaration syntax  <div class="section attribute-value-error" id="enumerated:invalid:http-equiv:content-type"><h3>Charset declaration syntax
787    <code>&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=<var>charset-name</var>&quot;&gt;</code>    <code class="html bad example">&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=<var>charset-name</var>&quot;&gt;</code>
788    is obsolete.</h3>    is obsolete.</h3>
789      <p>Old long charset declaration syntax      <p>Old long charset declaration syntax
790      <code>&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=<var>charset-name</var>&quot;&gt;</code>      <code class="html bad example">&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=<var>charset-name</var>&quot;&gt;</code>
791      is in use.  The document is non‐conforming.</p>      is in use.  The document is non‐conforming.</p>
792    
793      <p>The new charset declaration syntax is:      <p>The new charset declaration syntax is:
794        <pre>        <pre class="html example">
795  <code>&lt;meta charset=&quot;<var>charset-name</var>&quot;&gt;</code></pre>  <code>&lt;meta charset=&quot;<var>charset-name</var>&quot;&gt;</code></pre>
796      </p>      </p>
797    </div>    </div>
# Line 869  Web Document Conformance Checker (BETA)< Line 889  Web Document Conformance Checker (BETA)<
889      The document is non-conforming.</p>      The document is non-conforming.</p>
890    
891      <p>For example, the table below is non-conforming:      <p>For example, the table below is non-conforming:
892        <pre class="html non-conforming example">        <pre class="html bad example">
893  <code>&lt;table&gt;  <code>&lt;table&gt;
894  &lt;tbody&gt;  &lt;tbody&gt;
895  &lt;tr&gt;&lt;td rowspan=2&gt;&lt;/td&gt;&lt;/tr&gt;  &lt;tr&gt;&lt;td rowspan=2&gt;&lt;/td&gt;&lt;/tr&gt;
# Line 976  Web Document Conformance Checker (BETA)< Line 996  Web Document Conformance Checker (BETA)<
996      <code>text/cache-manifest</code> must contain a cache manifest.</p>      <code>text/cache-manifest</code> must contain a cache manifest.</p>
997    
998      <p>A cache manifest must start with a line whose content is      <p>A cache manifest must start with a line whose content is
999      <code>CACHE MANIFEST</code> (exactly one space character between      <code class="manifest example">CACHE MANIFEST</code>
1000        (exactly one space character between
1001      <code>CACHE</code> and <code>MANIFEST</code>).</p>      <code>CACHE</code> and <code>MANIFEST</code>).</p>
1002    </div>    </div>
1003  </section>  </section>
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