/[pub]/test/html-webhacc/error-description.en.html.u8

Diff of /test/html-webhacc/error-description.en.html.u8

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-revision 1.20 by wakaba,
Sun May 18 07:24:04 2008 UTC
+revision 1.39 by wakaba,
Wed Sep 17 03:56:43 2008 UTC
 Line 1
  <!DOCTYPE html><html id="error-description" lang="en" xmlns:d="http://suika.fam.cx/~wakaba/archive/2007/wdcc-desc/" xmlns="http://www.w3.org/1999/xhtml">
  <head>
- <title xml:lang="en">Description of Errors —
+ <base href="cc/">
- Web Document Conformance Checker (BETA)</title>
- <link href="cc-style" rel="stylesheet">
+ <link href="../cc-style" rel="stylesheet">
  <link href="#license" rel="license">
- </head>
+ <title xml:lang="en">Description of Errors — WebHACC (β)</title></head>
  <body>
- <h1>Description of Errors</h1>
+ <header>
+ <h1><a href="../cc-about"><abbr title="Web Hypertext Application Conformance Checker (β)"><img alt="WebHACC" src="../icons/title"></abbr></a></h1>
+ <h2>Description of Errors</h2>
+ </header>
+ <div class="section" id="WebHACC:Heading"><h3>
+   </h3>
+     <p><a href="./#input"><abbr title="Web Hypertext Application Conformance Checker">WebHACC</abbr></a>
+     is a <em>conformance checker</em> (or validator) for Web documents,
+     supporting <a href="../standards">latest Web standards</a> including
+     <a href="http://whatwg.org/html5"><abbr title="Hypertext Markup Language">HTML</abbr>5</a>,
+     <a href="urn:ietf:rfc:4287">Atom 1.0</a>,
+     <a href="http://www.w3.org/Style/CSS/current-work"><abbr title="Cascading Style Sheets">CSS</abbr>3</a>.</p>
+     <p><strong><a href="./#input">Check your document</a></strong>, or
+     <a href="../cc-about">learn more about
+     <abbr title="Web Hypertext Application Conformance Checker">WebHACC</abbr></a>.</p>
+   </div>
  <section id="character-encoding-layer">
  <h2>Character Encoding Layer Errors</h2>
- <div class="section error-category-charset" id="m:illegal-octets-error"><h3>An illegal octet in the input stream.</h3></div>
+ <div class="section" id="fallback-char-error"><h3>Octet sequence <code><var>{octets}</var></code>
+   is not an allowed representation of the character
+   <code><var>{char}</var></code> — character reference
+   <code><var>{char:hexref}</var></code> should be used instead.</h3></div>
+ <div class="section" id="fallback-unassigned-error"><h3>No character is assigned to octet sequence
+   <code><var>{octets}</var></code>.</h3></div>
+ <div class="section" id="illegal-octets-error"><h3>Octet sequence <code><var>{octets}</var></code>
+   is illegal.</h3></div>
+ <div class="section" id="invalid-state-error"><h3>The input stream is broken.</h3>
+     <p>The input stream is encoded in <code>ISO-2022-JP</code>
+     or its variant but is partially broken.</p>
+     <p>Note that an <code>ISO-2022-JP</code> stream must end in the ASCII
+     state.</p>
+   </div>
+ <div class="section" id="unassigned-code-point-error"><h3>No character is assigned to octet sequence
+   <code><var>{octets}</var></code>.</h3></div>
  </section>
  <section id="html5-character-encoding">
  <h2>HTML5 Character Encoding Errors</h2>
- <div class="section format-charset must" id="m:character-encoding"><h3>Character encoding <code><var>$0</var></code>
+ <div class="section" id="disallowed-character-encoding"><h3>Character encoding <code><var>{text}</var></code>
    is not allowed for <abbr>HTML</abbr> document.</h3>
      <p>The character encoding used for the document is not allowed
      for <abbr>HTML</abbr> document.  The document is non‐conforming.</p>
    </div>
- <div class="section format-charset should" id="s:character-encoding"><h3>Character encoding <code><var>$0</var></code>
+ <div class="section" id="bad-character-encoding"><h3>Character encoding <code><var>{text}</var></code>
    should not be used for <abbr>HTML</abbr> document.</h3>
      <p>The character encoding used for the document is not recommended
      for <abbr>HTML</abbr> document.  The document is non‐conforming
      unless there is any good reason to use that encoding.</p>
    </div>
- <div class="section format-charset warning" id="w:character-encoding"><h3>Use of UTF-8 is encouraged.</h3>
+ <div class="section" id="non-utf-8-character-encoding"><h3>Use of UTF-8 is encouraged (this document
+   is encoded in <code><var>{text}</var></code>).</h3>
      <p>Use of UTF-8 as the character encoding of the document is encouraged,
      though the use of another character encoding is still conforming.</p>
    </div>
- <div class="section format-charset unsupported" id="unsupported:character-encoding"><h3>Conformance for character encoding requirements
+ <div class="section" id="character-encoding-unchecked"><h3>Conformance for character encoding requirements
-   cannot be checked.</h3>
+   cannot be checked, since the input is not a byte stream.</h3>
      <p>The conformance checker cannot detect whether the input document
      met the requirements on character encoding, since the document
      is not inputed as a serialized byte sequence.  The document is
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+Line 86 
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      encoding with appropriate labeling.</p>
    </div>
- <div class="section format-charset error" id="m:no-character-encoding-declaration"><h3>There is no character encoding
+ <div class="section" id="no-character-encoding-declaration"><h3>There is no character encoding
    declaration.</h3>
      <p>The document does not contain a character encoding
      declaration.  Unless the character encoding is explicitly
-Line 53 
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+Line 95 
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      encoding declaration.  The document is non‐conforming.</p>
      <p>The long character encoding declaration syntax
-     <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>
+     <code class="html bad example">&lt;meta http-equiv="Content-Type" content="text/html; charset=<var>charset-name</var>"&gt;</code>
      is obsolete.  The new syntax is:</p>
      <pre class="html example">
- <code>&lt;meta charset=&quot;<var>charset-name</var>&quot;&gt;</code></pre>
+ <code>&lt;meta charset="<var>charset-name</var>"&gt;</code></pre>
      <p>Note that the <code>encoding</code> declaration in <abbr>XML</abbr>
      declaration has no effect for <abbr>HTML</abbr> document.</p>
    </div>
- <div class="section format-charset error" id="m:non-ascii-superset"><h3>No character encoding metadata is found
+ <div class="section" id="non-ascii-superset"><h3>No character encoding metadata is found
    in lower‐level protocol nor is there <abbr>BOM</abbr>, while
-   character encoding <code><var>$0</var></code>
+   character encoding <code><var>{text}</var></code>
    is not a superset of <abbr>ASCII</abbr>.</h3>
      <p>The document is not labeled with character encoding name
      in lower‐level protocol, e.g. in <abbr>HTTP</abbr>, and
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+Line 121 
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  <code>Content-Type: text/html; charset=<var>charset-name</var></code></pre>
      <p>Existence of <abbr>HTML</abbr> character encoding declaration, i.e.
-     <code class="html example">&lt;meta charset=&quot;<var>charset-name</var>&quot;&gt;</code>,
+     <code class="html example">&lt;meta charset="<var>charset-name</var>"&gt;</code>,
      does not allow to omit <code>charset</code> parameter
      for <abbr>HTML</abbr> document encoded in non‐<abbr>ASCII</abbr>
      compatible encoding.</p>
-Line 89 
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+Line 131 
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      <abbr>ASCII</abbr> for the purpose of <abbr>HTML</abbr> conformance.</p>
    </div>
- <div class="section format-charset warning" id="w:charset-label-detected"><h3>While parsing the document as
+ <div class="section" id="sniffing:chardet"><h3>Character encoding of this document is sniffed
-   <code><var>$0</var></code>, a character encoding declaration specifying
+   as <code><var>{text}</var></code> (Sniffed because no explicit specification
-   character encoding as <code><var>$1</var></code> is found.  The document
+   for the character encoding of this document is found in the transfer
+   procotol headers).</h3></div>
+ <div class="section" id="sniffing:default"><h3>Character encoding of this document is defaulted
+   to <code><var>{text}</var></code> because no explicit specification
+   for the character encoding of this document is found in the transfer
+   procotol headers.</h3></div>
+ <div class="section" id="chardecode:fallback"><h3>Results might be <em>wrong</em>, since the
+   conformance checker cannot find an appropriate decoder for the character
+   encoding used for the document.</h3>
+     <p>The conformance checker cannot find an appropriate decoder for
+     the character encoding used to encode characters in the document.</p>
+     <p>This error is raised if:</p>
+     <ul>
+     <li>the conformance checker cannot find any decoder for the character
+     encoding in use, but it knows that the encoding is similar to another
+     character encoding, such that it uses the decoder for that character
+     encoding, and therefore some octets might be interpreted incorrectly,
+     or,</li>
+     <li>the conformance checker find a decoder for the character encoding
+     in use, but it does not know whether the decoder is conforming to the
+     relevant specification or not, and therefore some octets might be
+     interpreted incorrectly.</li>
+     </ul>
+     <p>In either case, the result shown by the conformance checker might
+     contain wrong errors caused by errorneous decoder or might not contain
+     errors that should be raised if an appropriate decoder is used.</p>
+     <!-- TODO: add advise that either install relevant modules or
+          join the developmenet of the modules... -->
+   </div>
+ <div class="section" id="chardecode:no-error"><h3>Conformance error checking for the character
+   encoding <code><var>{text}</var></code> is not supported.</h3></div>
+ <div class="section" id="charset-label:matching"><h3>Sniffed character encoding
+   <code><var>{text}</var></code> is same as the character encoding specified
+   in the character encoding declaration.  This is <em>not</em> an
+   error.</h3></div>
+ <div class="section" id="charset-label-detected"><h3>While parsing the document as
+   <code><var>{text}</var></code>, a character encoding declaration specifying
+   a different character encoding is found.  The document
    is reparsed.</h3>
      <p>While parsing a document in a character encoding,
      a character encoding declaration which declares the character
-Line 109 
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+Line 196 
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      <li>Specify <code>charset</code> parameter in the <code>Content-Type</code>
      field in the <abbr>HTTP</abbr> header, as:
      <pre class="HTTP example">
- <code>Content-Type: text/html; charset=&quot;<var>charset-name</var>&quot;</code></pre></li>
+ <code>Content-Type: text/html; charset="<var>charset-name</var>"</code></pre></li>
      <li>Put the character encoding declaration
-     (<code class="html example">&lt;meta charset=&quot;<var>charset-name</var>&quot;&gt;</code>)
+     (<code class="html example">&lt;meta charset="<var>charset-name</var>"&gt;</code>)
      just after <code class="html example">&lt;head&gt;</code> start tag.</li>
      <li>Use <code>UTF-8</code>.</li>
      </ul>
    </div>
  </section>
- <section id="html5-tokenize-error">
+ <section id="character-set-layer">
- <h2>HTML5 Parse Errors in Tokenization Stage</h2>
+ <h2>Coded Character Set Layer Errors</h2>
- <div class="section parse-error" id="after-html"><h3>Tag <code>&lt;<var>$0</var>&gt;</code>
+ <div class="section" id="NULL"><h3>The <code class="charname">NULL</code> character
-   is not allowed after the end tag <code>&lt;/html&gt;</code>.</h3>
+   is not allowed.</h3></div>
-     <p>The start or end tag of an element appears after the
-     <code>html</code> element has been closed.  The document is
+ <div class="section" id="control-char"><h3>Code point <code><var>{text}</var></code> is
-     non-conforming.</p>
+   not allowed.</h3></div>
-     <p>Any content of the document other than comments
+ <div class="section" id="nonchar"><h3>Noncharacter <code><var>{text}</var></code>
-     must be put into the <code>html</code> element.</p>
+   is found in the input stream.</h3>
+     <p>Noncharacter code points are used in the input stream.</p>
+     <p>Noncharacter code points are reserved for internal processings.
+     Their use for information interchanges are forbidden.</p>
+     <p>In addition, they are not allowed in HTML document.</p>
+     <!-- "permanently undefined Unicode characters" in HTML5. -->
    </div>
- <div class="section parse-error" id="after-body"><h3>Tag <code>&lt;<var>$0</var>&gt;</code>
+ <div class="section" id="non-unicode"><h3>Character <code><var>{text}</var></code> is not
-   is not allowed after the end tag <code>&lt;/body&gt;</code>.</h3>
+   a Unicode character.</h3></div>
-     <p>The start or end tag of an element appears after the
-     <code>body</code> element has been closed.  The document is
-     non-conforming.</p>
-     <p>Any content of the document other than <code>head</code>
+ <div class="section" id="unicode-deprecated"><h3>Use of character <code><var>{text}</var></code>
-     contents and comments must be put into the <code>body</code>
+   is deprecated.</h3></div>
-     element.</p>
+ <div class="section" id="unicode-discouraged"><h3>Use of character <code><var>{text}</var></code>
+   is discouraged.</h3></div>
+ <div class="section" id="unicode-not-preferred"><h3>Code point <code><var>{text}</var></code>
+   is not the preferred representation of that character.</h3></div>
+ <div class="section" id="unicode-should"><h3>Character <code><var>{text}</var></code>
+   should not be used in many cases.</h3></div>
+ </section>
+ <section id="html5-tokenize-error">
+ <h2>HTML5 Parse Errors in Tokenization Stage</h2>
+ <div class="section" id="bad-attribute-name"><h3>Attribute name cannot contain characters
+   <code>"</code>, <code>'</code>, and <code>=</code>.</h3></div>
+ <div class="section" id="bad-attribute-value"><h3>Attribute value must be quoted by <code>"</code>
+   or <code>'</code> if it contains a <code>"</code>, <code>'</code>, or
+   <code>=</code> character.</h3>
+     <p>In an unquoted attribute value, a character <code>"</code>
+     (<code>U+0022</code> <code class="charname">QUOTATION MARK</code>),
+     <code>'</code> (<code>U+0026</code>
+     <code class="charname">APOSTROPHE</code>), or <code>=</code>
+     (<code>U+003D</code> <code class="charname">EQUAL SIGN</code>)
+     is contained.  These characters are not allowed in unquoted attribute
+     values, since they are used to quote attribute values or to separate
+     attribute name and value.</p>
+     <p>This error is also raised if one try to use empty attribute
+     value like <code class="html bad example">&lt;foo bar= baz=&gt;</code>;
+     in this example, <code class="html bad example">baz=</code> is
+     treated as an invalid attribute value for the attribute
+     <code class="html bad example">bar</code>, not as another attribute.</p>
    </div>
- <div class="section tokenize-error" id="bare-ero"><h3>The <code>&amp;</code> character must
+ <div class="section" id="bare-ero"><h3>The <code>&amp;</code> character must
    be escaped as <code class="html example">&amp;amp;</code>.</h3>
      <p>An <code>&amp;</code> character which
      is not part of any reference appears in the input stream.
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+Line 304 
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      </p>
    </div>
- <div class="section tokenize-error" id="bare-etago"><h3>A <code>&lt;/</code> string is not followed
+ <div class="section" id="bare-etago"><h3>A <code>&lt;/</code> string is not followed
    by a tag name.</h3>
      <p>There is a <code>&lt;</code> (<code>U+003C</code>
      <code class="charname">LESS-THAN SIGN</code>) character
-Line 199 
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+Line 324 
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      </p>
    </div>
- <div class="section tokenize-error" id="bare-stago"><h3>A <code>&lt;</code> character is not followed
+ <div class="section" id="bare-stago"><h3>A <code>&lt;</code> character is not followed
    by tag name or by a <code>!</code> character.</h3>
      <p>A <code>&lt;</code> (<code>U+003C</code>
      <code class="charname">LESS-THAN SIGN</code>) character which is not part
-Line 212 
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+Line 337 
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      </p>
    </div>
- <div class="section tokenize-error" id="bare-nero"><h3>The decimal representation of the code position
+ <div class="section" id="bare-nero"><h3>The decimal representation of the code position
    of a character must be specified after <code>&amp;#</code>.</h3>
      <p>An <code>&amp;</code> (<code>U+0026</code>
      <code class="charname">AMPERSAND</code>) character immediately
-Line 244 
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+Line 369 
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      </p>
    </div>
- <div class="section tokenize-error" id="bare-hcro"><h3>The hexadecimal representation of the code position
+ <div class="section" id="bare-hcro"><h3>The hexadecimal representation of the code position
    of a character must be specified after <code>&amp;#x</code>.</h3>
     <p>The string <code>&amp;#x</code> or <code>&amp;#X</code> which
     is not part of any reference appears in the input stream.
-Line 264 
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+Line 389 
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      </p>
    </div>
- <div class="section tokenize-error" id="bogus-comment"><h3>String <code>&lt;!</code> is not followed
+ <div class="section" id="bogus-comment"><h3>String <code>&lt;!</code> is not followed
    by <code>--</code>.</h3>
      <p>There is a <code>&lt;</code> (<code>U+003C</code>
      <code class="charname">LESS-THAN SIGN</code>) character
-Line 294 
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+Line 419 
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      </dl>
    </div>
- <div class="section tokenize-error" id="bogus-end-tag"><h3>String <code>&lt;/</code> is not followed
+ <div class="section" id="bogus-end-tag"><h3>String <code>&lt;/</code> is not followed
    by tag name.</h3>
      <p>There is a <code>&lt;</code> (<code>U+003C</code>
      <code class="charname">LESS-THAN SIGN</code>) character
-Line 313 
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+Line 438 
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      </p>
    </div>
- <div class="section tokenize-error" id="dash-in-comment"><h3>There is a <code>--</code> sequence
+ <div class="section" id="C1-character-reference"><h3>Character reference to
+   <code><var>{text}</var></code> is not allowed.</h3></div>
+ <div class="section" id="CR-character-reference"><h3>Character reference to
+   <code>U+000D</code> (<code class="charname">CARRIAGE RETURN</code>)
+   is not allowed.</h3></div>
+ <div class="section" id="dash-in-comment"><h3>There is a <code>--</code> sequence
    in a comment.</h3>
      <p>There is a <code>-</code> (<code>U+002D</code>
      <code class="charname">HYPHEN-MINUS</code>) character
-Line 326 
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+Line 458 
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      declaration.</p>
    </div>
- <div class="section tokenize-error" id="duplicate-attribute"><h3>There are two attributes with name
+ <div class="section" id="duplicate-attribute"><h3>There are two attributes with name
-       <code><var>$0</var></code>.</h3>
+       <code><var>{text}</var></code>.</h3>
      <p>There are more than one attributes with the same
      name in a tag.  The document is non-conforming.</p>
-Line 335 
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+Line 467 
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      Use <code>img</code> element with animation GIF instead.</p>
    </div>
- <div class="section tokenize-error" id="nestc"><h3>Polytheistic slash (<code>/&gt;</code>) cannot be
+ <div class="section" id="empty-start-tag"><h3>Empty start tag (<code>&lt;&gt;</code>) is not
+   allowed.</h3></div>
+ <div class="section" id="empty-end-tag"><h3>Empty end tag (<code>&lt;/&gt;</code>) is not
+   allowed.</h3></div>
+ <div class="section" id="end-tag-attribute"><h3>End tag cannot have attributes.</h3></div>
+ <div class="section" id="empty-unquoted-attribute-value"><h3>Attribute value is not specified.</h3>
+     <p>The attribute value is not specified after the <code>=</code>
+     (<code>U+003C</code> <code class="charname">EQUAL SIGN</code>)
+     character.</p>
+     <p>When an attribute value is empty, the <code>=</code> character after
+     the attribute name must be specified as:</p>
+     <p><code class="html example">&lt;foo bar&gt;</code></p>
+     <p>Instead, quotation marks can be used to explicitly represent that
+     the attribute value is empty, as:</p>
+     <p><code class="html example">&lt;foo bar=""&gt;</code></p>
+     <p>... or like:</p>
+     <p><code class="html example">&lt;foo bar=''&gt;</code></p>
+   </div>
+ <div class="section" id="invalid-character-reference"><h3>Character reference to
+   <code><var>{text}</var></code> is not allowed.</h3></div>
+ <div class="section" id="nestc"><h3>Polytheistic slash (<code>/&gt;</code>) cannot be
    used for this element.</h3>
      <p>Polytheistic slash (<code>/&gt;</code>) must not be used
      for the element.  The document is non-conforming.</p>
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+Line 542 
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      no effect in HTML.</p>
    </div>
+ <div class="section" id="no-DOCTYPE-name"><h3>After the string <code>&lt;!DOCTYPE </code>, the
+   document type name must be specified.</h3></div>
+ <div class="section" id="no-PUBLIC-literal"><h3>After the keyword <code>PUBLIC</code>, no
+   oublic identifier is specified.</h3></div>
+ <div class="section" id="no-refc"><h3>Character reference must be closed by a
+   <code>;</code> character.</h3></div>
+ <div class="section" id="no-space-before-DOCTYPE-name"><h3>After the string <code>&lt;!DOCTYPE</code>, there
+   must be at least a white space character before the document type
+   name.</h3></div>
+ <div class="section" id="no-space-between-attributes"><h3>Attributes must be separeted by at least a
+   white space character.</h3></div>
+ <div class="section" id="no-SYSTEM-literal"><h3>After the keyword <code>SYSTEM</code>, no
+   system identifier is specified.</h3></div>
- <div class="section tokenize-error" id="pio"><h3>Processing instruction
+ <div class="section" id="pio"><h3>Processing instruction
-   (<code>&lt;?<var>...</var>&gt;</code>) cannot be used.</h3>
+   (<code>&lt;?<var>...</var>&gt;</code>) is not allowed in HTML
+   document.</h3>
      <p>Processing instructions (<code>&lt;?<var>...</var>?&gt;</code>),
      including XML declaration (<code>&lt;?xml <var>...</var>?&gt;</code>)
      and XML style sheet <abbr title="processing instruction">PI</abbr>
-Line 410 
 p {
+Line 592 
 p {
          <code>alternate stylesheet</code> for an alternate style
          sheet).
            <pre class="example html">
- <code>&lt;link rel=stylesheet href=&quot;path/to/stylesheet.css&quot;&gt;</code></pre>
+ <code>&lt;link rel=stylesheet href="path/to/stylesheet.css"&gt;</code></pre>
          </dd>
      <dt><code>&lt;?php?&gt;</code> or
      <code>&lt;? <var>... <abbr>PHP</abbr> code ...</var> ?&gt;</code>
-Line 429 
 p {
+Line 611 
 p {
      as string.</p>
    </div>
+ <div class="section" id="string-after-DOCTYPE-name"><h3>There is a bogus string after the document type
+   name.</h3></div>
+ <div class="section" id="string-after-PUBLIC"><h3>There is a bogus string after the keyword
+   <code>PUBLIC</code>.</h3></div>
+ <div class="section" id="string-after-PUBLIC-literal"><h3>There is a bogus string after the public
+   identifier.</h3></div>
+ <div class="section" id="string-after-SYSTEM"><h3>There is a bogus string after the keyword
+   <code>SYSTEM</code>.</h3></div>
+ <div class="section" id="string-after-SYSTEM-literal"><h3>There is a bogus string after the system
+   identifier.</h3></div>
+ <div class="section" id="unclosed-attribute-value"><h3>Attribute value is not closed by a quotation
+   mark.</h3></div>
+ <div class="section" id="unclosed-comment"><h3>Comment is not closed by a string
+   <code>--&gt;</code>.</h3></div>
+ <div class="section" id="unclosed-DOCTYPE"><h3>The <code>DOCTYPE</code> is not closed by a
+   <code>&gt;</code> character.</h3></div>
+ <div class="section" id="unclosed-PUBLIC-literal"><h3>The public identifier literal is not closed by a
+   quotation mark.</h3></div>
+ <div class="section" id="unclosed-SYSTEM-literal"><h3>The system identifier literal is not closed by a
+   quotation mark.</h3></div>
+ <div class="section" id="unclosed-tag"><h3>Tag is not closed by a <code>&gt;</code>
+   character.</h3></div>
  </section>
  <section id="html5-parse-errors">
  <h2>HTML5 Parse Errors in Tree Construction Stage</h2>
- <div class="section parse-error" id="after-head"><h3>The <code><var>$0</var></code> element cannot be
+ <div class="section" id="after-after-frameset"><h3>There is a start tag
-   inserted between <code>head</code> and <code>body</code> elements.</h3>
+   <code>&lt;<var>{text}</var>&gt;</code> is after the <code>html</code> element
+   is closed.</h3></div>
+ <div class="section" id="after-after-frameset:/"><h3>There is an end tag
+   <code>&lt;/<var>{text}</var>&gt;</code> is after the <code>html</code> element
+   is closed.</h3></div>
+ <div class="section" id="after-body"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code> is
+   not allowed after the <code>body</code> is closed.</h3></div>
+ <div class="section" id="after-body:/"><h3>End tag <code>&lt;/<var>{text}</var>&gt;</code> is
+   not allowed after the <code>body</code> is closed.</h3></div>
+ <div class="section" id="after-body:#text"><h3>Non‐white‐space characters are not allowed
+   after the <code>body</code> is closed.</h3></div>
+ <div class="section" id="after-frameset"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code> is
+   not allowed after the <code>frameset</code> is closed.</h3></div>
+ <div class="section" id="after-frameset:/"><h3>End tag <code>&lt;/<var>{text}</var>&gt;</code> is
+   not allowed after the <code>frameset</code> is closed.</h3></div>
+ <div class="section" id="after-frameset:#text"><h3>Non‐white‐space characters are not allowed
+   after the <code>frame</code> is closed.</h3></div>
+ <div class="section" id="after-head"><h3>The <code><var>{text}</var></code> element cannot be
+   inserted between <code>head</code> and <code>body</code>
+   elements.</h3>
      <p>A start tag appears after the <code>head</code> element is closed
      but before the <code>body</code> element is opened.
      The document is non-conforming.</p>
    </div>
- <div class="section parse-error" id="DOCTYPE-in-the-middle"><h3>A <code>DOCTYPE</code> appears after any
+ <div class="section" id="after-html"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code> is
-   element or data character has been seen.</h3>
+   not allowed after the <code>html</code> is closed.</h3>
-     <p>A <code>DOCTYPE</code> appears after any element or data character
+     <p>The start tag of an element appears after the
-     has been seen.  The document is non-conforming.</p>
+     <code>body</code> element has been closed.  The document is
+     non-conforming.</p>
-     <p>The <code>DOCTYPE</code> must be placed before any
-     tag, reference, or data character.  Only white space characters
+     <p>Any content of the document other than <code>head</code>
-     and comments can be inserted before the <code>DOCTYPE</code>.</p>
+     contents and comments must be put into the <code>body</code>
+     element.</p>
+   </div>
+ <div class="section" id="after-html:/"><h3>End tag <code>&lt;/<var>{text}</var>&gt;</code> is
+   not allowed after the <code>html</code> is closed.</h3>
+     <p>The end tag of an element appears after the
+     <code>body</code> element has been closed.  The document is
+     non-conforming.</p>
+     <p>Any content of the document other than <code>head</code>
+     contents and comments must be put into the <code>body</code>
+     element.</p>
    </div>
- <div class="section parse-error" id="in-a:a"><h3>Anchor cannot be nested.</h3>
+ <div class="section" id="after-html:#text"><h3>Non‐white‐space characters are not allowed
+   after the <code>html</code> is closed.</h3></div>
+ <div class="section" id="image"><h3>The <code>image</code> element is
+   obsolete.</h3></div>
+ <div class="section" id="in-a:a"><h3>Anchor cannot be nested.</h3>
      <p>HTML <code>a</code> elements cannot be nested.
      The document is non-conforming.</p>
-Line 459 
 p {
+Line 719 
 p {
      implies the end tag of any opening <code>a</code> element.</p>
    </div>
- <div class="section parse-error" id="in-body"><h3>Tag <code>&lt;<var>$0</var>&gt;</code>
+ <div class="section" id="in-body"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code>
    is not allowed in the <code>body</code> element.</h3>
      <p>The start or end tag of an element, which
      cannot be a descendant of <code>body</code> element, appears
-Line 467 
 p {
+Line 727 
 p {
      The document is non-conforming.</p>
    </div>
- <div class="section parse-error" id="in-head:head"><h3>Start tag <code>&lt;head&gt;</code>
+ <div class="section" id="in-body:#eof"><h3>Some element is not closed before the end of
+   file.</h3></div>
+ <div class="section" id="in-button:button"><h3>The <code>button</code> element cannot be
+   nested.</h3></div>
+ <div class="section" id="in-CDATA:#eof"><h3>Element is not closed before the end of
+   file.</h3></div>
+ <div class="section" id="in-form:form"><h3>Start tag <code>&lt;form&gt;</code> is
+   not allowed in a <code>form</code> element.</h3></div>
+ <div class="section" id="in-frameset"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code> is
+   not allowed in a <code>framset</code> element.</h3></div>
+ <div class="section" id="in-frameset:/"><h3>End tag <code>&lt;/<var>{text}</var>&gt;</code> is
+   not allowed in a <code>frameset</code> element.</h3></div>
+ <div class="section" id="in-frameset:#text"><h3>Non‐white‐space characters are not allowed
+   in a <code>frameset</code> element.</h3></div>
+ <div class="section" id="in-head:head"><h3>Start tag <code>&lt;head&gt;</code>
    is not allowed in the <code>head</code> element.</h3>
      <p>There is a start tag <code>&lt;head&gt;</code> in the
      <code>&lt;head&gt;</code> element.  The document is non-conforming.</p>
-Line 477 
 p {
+Line 758 
 p {
      start tag <code>&lt;head&gt;</code> can appear in the input stream.</p>
    </div>
- <div class="section parse-error" id="in-table"><h3>Tag <code>&lt;<var>$0</var>&gt;</code>
+ <div class="section" id="in-html:#DOCTYPE"><h3>A <code>DOCTYPE</code> appears after any
+   element or data character has been seen.</h3>
+     <p>A <code>DOCTYPE</code> appears after any element or data character
+     has been seen.  The document is non-conforming.</p>
+     <p>The <code>DOCTYPE</code> must be placed before any
+     tag, reference, or data character.  Only white space characters
+     and comments can be inserted before the <code>DOCTYPE</code>.</p>
+   </div>
+ <div class="section" id="in-nobr:nobr"><h3>The <code>nobr</code> element cannot be
+   nested.</h3></div>
+ <div class="section" id="in-noscript"><h3>The <code><var>{text}</var></code> element is not
+   allowed in a <code>noscript</code> element in the
+   <code>head</code> element.</h3></div>
+ <div class="section" id="in-noscript:/"><h3>An end tag <code>&lt;/<var>{text}</var>&gt;</code>
+   appers before the <code>noscript</code> element is closed.</h3></div>
+ <div class="section" id="in-noscript:#eof"><h3>A <code>noscript</code> element is not closed
+   before the end of file.</h3></div>
+ <div class="section" id="in-noscript:#text"><h3>Non‐white‐space characters are not allowed
+   in a <code>noscript</code> element in the <code>head</code>
+   element.</h3></div>
+ <div class="section" id="in-PCDATA:#eof"><h3>Element is not closed before the end of
+   file.</h3></div>
+ <div class="section" id="in-select"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code>
+   is not allowed in a <code>select</code> element.</h3></div>
+ <div class="section" id="in-select:/"><h3>End tag <code>&lt;/<var>{text}</var>&gt;</code>
+   is not allowed in a <code>select</code> element.</h3></div>
+ <div class="section" id="in-table"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code>
    is not allowed in a <code>table</code> element.</h3>
      <p>The start or end tag of an element, which
      cannot be a child of <code>table</code> element, appears
-Line 491 
 p {
+Line 808 
 p {
      a table caption.</p>
    </div>
- <div class="section parse-error" id="in-table:#character"><h3>Data character is not allowed in
+ <div class="section" id="in-table:/"><h3>End tag <code>&lt;/<var>{text}</var>&gt;</code>
-   <code>table</code>.</h3>
+   is not allowed in a <code>table</code> element.</h3></div>
-     <p>A data character appears in <code>table</code>.  The document
-     is non-conforming.</p>
+ <div class="section" id="in-table:#text"><h3>Non‐white‐space character is not allowed within
+   the <code>table</code> element, outside of the caption and cells.</h3>
+     <p>A non‐white‐space character appears in <code>table</code>.
+     The document is non-conforming.</p>
      <p>In <code>table</code>, only table related elements
      are allowed; any other element and data character must be contained in
-Line 503 
 p {
+Line 823 
 p {
      a table caption.</p>
    </div>
- <div class="section parse-error" id="missing-start-tag:tr"><h3>Start tag of <code>tr</code>
+ <div class="section" id="isindex"><h3>The <code>isindex</code> element is
+   obsolete.</h3></div>
+ <div class="section" id="missing-start-tag:tr"><h3>Start tag of <code>tr</code>
    element is missing.</h3>
      <p>Start tag of a <code>tr</code> element, which is <em>not</em>
      optional, is missing.  The document is non-conforming.</p>
-Line 515 
 p {
+Line 838 
 p {
      these start tags, it must be explicitly specified.</p>
    </div>
- <div class="section parse-error" id="no-DOCTYPE"><h3>This document does not start with a
+ <div class="section" id="no-DOCTYPE"><h3>This document does not start with a
    <code>DOCTYPE</code>.</h3>
      <p>The document does not start with a <code>DOCTYPE</code>.
      The document is non-conforming.</p>
-Line 530 
 p {
+Line 853 
 p {
      allowed in HTML document.</p>
    </div>
- <div class="section parse-error" id="not-closed"><h3>Element <code><var>$0</var></code> is not
+ <div class="section" id="not-closed"><h3>Element <code><var>{text}</var></code> is not
    closed.</h3>
      <p>End tag of an element is not found before, for example,
      an end tag of another element appears or
-Line 559 
 p {
+Line 882 
 p {
      allowed and they also cause this error.</p>
    </div>
- <div class="section parse-error" id="not-first-start-tag"><h3>This <code>&lt;html&gt;</code> tag is not
+ <div class="section" id="not-first-start-tag"><h3>This <code>&lt;html&gt;</code> tag is not
    the first start tag.</h3>
      <p>There is a start tag of the <code>html</code> element
      that it not the first start tag in the input stream.
-Line 573 
 p {
+Line 896 
 p {
      and comments.</p>
    </div>
- <div class="section parse-error" id="not-HTML5"><h3>This document is written in an old version of
+ <div class="section" id="not-HTML5"><h3>This document is written in an old version of
    HTML.</h3>
      <p>The document contains a <code>DOCTYPE</code> declaration
      that is different from HTML5 <code>DOCTYPE</code> (i.e.
-Line 587 
 p {
+Line 910 
 p {
      HTML document (roughly) as defined in HTML5.</p>
    </div>
- <div class="section parse-error" id="unmatched-end-tag"><h3>Element <code><var>$0</var></code> is not
+ <div class="section" id="start-tag-not-allowed"><h3>Start tag <code>&lt;<var>{text}</var>&gt;</code> is
+   not allowed here.</h3></div>
+ <div class="section" id="unmatched-end-tag"><h3>Element <code><var>{text}</var></code> is not
    opened.</h3>
      <p>An end tag appears though no element with the same name
      has been opened.  The document is non-conforming.</p>
-Line 609 
 p {
+Line 935 
 p {
      </dl>
    </div>
+ <div class="section" id="XSLT-compat"><h3>The <code>DOCTYPE</code> legacy string is
+   used.</h3>
+     <p>The <code>DOCTYPE</code> with the <code>DOCTYPE</code> legacy
+     string, i.e.
+     <code class="html bad example">&lt;!DOCTYPE HTML PUBLIC "XSLT-compat"&gt;</code>
+     is used.</p>
+     <p>The <code>DOCTYPE</code> legacy string should not be used for documents
+     <em>not</em> generated from XSLT transformation process.  It is allowed
+     only to enable to use XSLT style sheets with the HTML output mode, which
+     does not support generation of the <code>DOCTYPE</code> with no
+     <code>PUBLIC</code>
+     identifier.  For other purposes, the <code>DOCTYPE</code> legacy
+     string, i.e. <code class="html bad example">PUBLIC "XSLT-compat"</code>,
+     is useless and should not be used.</p>
+   </div>
  </section>
  <section id="element-content-model-errors">
  <h2>Element Content Model Errors</h2>
- <div class="section content-model-error" id="character-not-allowed"><h3>Data character is not allowed in this
+ <div class="section" id="basehref-after-URL-attribute"><h3>The <code>base</code> element with the
+   <code>href</code> attribute specified cannot be placed after
+   any attribute with a URL.</h3></div>
+ <div class="section" id="basetarget-after-hyperlink"><h3>The <code>base</code> element with the
+   <code>target</code> attribute specified cannot be placed after
+   any element that defines a hyperlink.</h3></div>
+ <div class="section" id="character-not-allowed"><h3>Data character is not allowed in this
    context.</h3>
      <p>A data character appears where it is not allowed in this
      context.  The document is non-conforming.</p>
-Line 637 
 p {
+Line 988 
 p {
      </p>
    </div>
- <div class="section content-model-error" id="child-element-missing"><h3>There must be a <code><var>$0</var></code>
+ <div class="section" id="character-not-allowed:empty"><h3>Non‐white‐space characters are not allowed in
-   element as a child of this element.</h3>
+   an empty element.</h3></div>
+ <div class="section" id="character-not-allowed:atom|PersonConstruct"><h3>Non‐white‐space characters are not allowed in
+   Person construct.</h3></div>
+ <div class="section" id="character-not-allowed:atom|TextConstruct"><h3>Non‐white‐space characters are not allowed in
+   Text construct.</h3></div>
+ <div class="section" id="child-element-missing"><h3>There must be an element
+   <code><var>{text}</var></code> as a child of this element.</h3>
      <p>The content model of the element is so defined that it
      must contain a <code><var>$0</var></code> child element.
      The document is non-conforming.</p>
-Line 655 
 p {
+Line 1015 
 p {
      </dl>
    </div>
- <div class="section content-model-error" id="child-element-missing:td|th"><h3>There must be a <code>td</code>
+ <div class="section" id="child-element-missing:td|th"><h3>There must be a <code>td</code>
    or <code>th</code> element as a child of this element.</h3>
      <p>The <code>tr</code> element must contain at least one
      <code>td</code> or <code>th</code> child element.  The document
      is non-conforming.</p>
    </div>
- <div class="section content-model-error" id="element-not-allowed"><h3>This element is not allowed in this
+ <div class="section" id="child-element-missing:atom"><h3>There must be an element
+   <code><var>{text}</var></code> in the Atom namespace as a child of this
+   element.</h3></div>
+ <div class="section" id="child-element-missing:atom:link:alternate"><h3>There must be an Atom <code>link</code> element
+   whose <code>rel</code> attribute is set to <code>alternate</code> as a
+   child of this element.</h3></div>
+ <div class="section" id="child-element-missing:atom:link:self"><h3>There should be an Atom <code>link</code> element
+   whose <code>rel</code> attribute is set to <code>self</code> as a
+   child of this element.</h3></div>
+ <div class="section" id="element-missing:hn"><h3>There must be at least one
+   <code>h<var>n</var></code> element descendant.</h3></div>
+ <div class="section" id="element-not-allowed"><h3>This element is not allowed in this
    context.</h3>
      <p>An element appears where it is not allowed.  The document
      is non-conforming.</p>
-Line 727 
 p {
+Line 1102 
 p {
      </p>
    </div>
- <div class="section content-model-error" id="element-not-allowed:root"><h3>This element is not allowed as a root
+ <div class="section" id="element-not-allowed:area"><h3>An <code>area</code> element cannot be used
-   element.</h3>
+   outside of a <code>map</code> element.</h3></div>
+ <div class="section" id="element-not-allowed:base"><h3>There is another <code>base</code>
+   element.</h3></div>
+ <div class="section" id="element-not-allowed:datatemplate"><h3>In a <code>datatemplate</code> element, only
+   <code>rule</code> elements are allowed.</h3></div>
+ <div class="section" id="element-not-allowed:details-legend"><h3>In a <code>details</code> element, only at the
+   beginning of the element a <code>lengend</code> element
+   may be used.</h3></div>
+ <div class="section" id="element-not-allowed:empty"><h3>Elements are not allowed in an empty
+   element.</h3></div>
+ <div class="section" id="element-not-allowed:figure-legend"><h3>In a <code>figure</code> element, only at the
+   beginning or only at the end of the element a <code>lengend</code> element
+   may be used.</h3></div>
+ <div class="section" id="element-not-allowed:flow"><h3>This element is not allowed where flow
+   content is expected.</h3></div>
+ <div class="section" id="element-not-allowed:flow-style"><h3>A <code>style</code> element without
+   <code>scoped</code> attribute is not allowed in this context.</h3></div>
+ <div class="section" id="element-not-allowed:head-noscript"><h3>This element is not allowed in a
+   <code>noscript</code> element in the <code>head</code> element.</h3></div>
+ <div class="section" id="element-not-allowed:head-style"><h3>A <code>style</code> element with
+   <code>scoped</code> attribute is not allowed in the <code>head</code>
+   element.</h3></div>
+ <div class="section" id="element-not-allowed:head-title"><h3>There is another <code>title</code>
+   element.</h3></div>
+ <div class="section" id="element-not-allowed:minus"><h3>This element is not allowed in this
+   context.</h3></div>
+ <div class="section" id="element-not-allowed:meta-charset"><h3>The character encoding declaration is not the
+   first child element in the <code>head</code> element.</h3>
+     <p>The character encoding declaration
+     (<code class="html example">&lt;meta charset="<var>...</var>"&gt;</code> or
+     <code class="html example">&lt;meta http-equiv=Content-Type content="text/html; charset=<var>...</var>"&gt;</code>
+     must be the first child element in the <code>head</code> element.</p>
+     <p>The character encoding declaration have to occur near the beginning
+     of the document to ensure that Web browsers can be determine the
+     character encoding of the document.</p>
+     <p>The <code>title</code> element and other metadata elements must
+     appear after any character encoding declaration is processed.</p>
+   </div>
+ <div class="section" id="element-not-allowed:metadata"><h3>This element is not allowed where metadata
+   content is expected.</h3></div>
+ <div class="section" id="element-not-allowed:phrasing"><h3>This element is not allowed where phrasing
+   content is expected.</h3></div>
+ <div class="section" id="element-not-allowed:root"><h3>This element is not allowed as the root
+   element of a document.</h3>
      <p>An element that is not allowed as the root element
      is used as the root element of the document.  The document is
      non-conforming, as far as the conformance checker can tell.</p>
-Line 738 
 p {
+Line 1173 
 p {
          <dd><p>In <abbr>XHTML</abbr> document, the root <code>html</code>
          element must have an <code>xmlns</code> attribute as:
            <pre class="xml example">
- <code>&lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;</code></pre></p></dd>
+ <code>&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;</code></pre></p></dd>
      <dt><code>rss</code> element</dt>
          <dd><p>The document is written in some version of RSS.</p>
          <p>The conformance checker does not support any version
-Line 748 
 p {
+Line 1183 
 p {
          in the <code>http://www.w3.org/2005/Atom</code>
          namespace as:
            <pre class="xml example">
- <code>&lt;feed xmlns=&quot;http://www.w3.org/2005/Atom&quot;&gt;</code></pre>
+ <code>&lt;feed xmlns="http://www.w3.org/2005/Atom"&gt;</code></pre>
          </p>
          <p>The conformance checker does not support Atom 0.3.
          Use Atom 1.0 for feed documents.</p></dd>
      </dl>
    </div>
- <div class="section content-model-error" id="ps-element-missing"><h3>There is no <code><var>$0</var></code>
+ <div class="section" id="element-not-allowed:root:xml"><h3>This element is not allowed as the root element
+   of an XML document.</h3></div>
+ <div class="section" id="element-not-allowed:ruby-base"><h3>This element is not allowed in the <code>ruby</code>
+   element.</h3></div>
+ <div class="section" id="element-not-allowed:text"><h3>This element is not allowed in this
+   context.</h3></div>
+ <div class="section" id="element-not-allowed:atom|content"><h3>This element is not allowed in an Atom
+   <code>content</code> element.</h3></div>
+ <div class="section" id="element-not-allowed:atom|PersonConstruct"><h3>This element is not allowed in Person
+   construct.</h3></div>
+ <div class="section" id="element-not-allowed:atom|TextConstruct"><h3>This element is not allowed in Text
+   construct.</h3></div>
+ <div class="section" id="element-not-defined"><h3>This element is not defined.</h3>
+     <p>The element is not one of elements allowed
+     in the latest version of relevant specifications.</p>
+     <p>The element cannot be used.</p>
+     <dl class="switch">
+     <dt><code>event-source</code> element</dt>
+         <dd>The element was renamed as <em><code>eventsource</code>
+         element</em> (no hyphen).</dd>
+     <dt><code>m</code> element</dt>
+         <dd>The element was renamed as <em><code>mark</code>
+         element</em>.</dd>
+     </dl>
+   </div>
+ <div class="section" id="no-significant-content"><h3>No significant content is contained
+   in this element.</h3></div>
+ <div class="section" id="no-significant-content-before"><h3>There is no significant content
+   before this element.</h3></div>
+ <div class="section" id="no-significant-content-at-the-end"><h3>No significant content is contained
+   at the end of this element.</h3></div>
+ <div class="section" id="ps-element-missing"><h3>There is no <code><var>{text}</var></code>
    element before this element.</h3>
      <p>There must be an element before another element, but there
      is not.  The document is non-conforming.</p>
-Line 764 
 p {
+Line 1242 
 p {
      before any <code>dd</code> element.</p>
    </div>
+ <div class="section" id="rp:syntax-error"><h3>The content of a <code>rp</code> element must
+   be a parenthesis.</h3></div>
  </section>
  <section id="attribute-errors">
  <h2>Attribute Errors</h2>
- <div class="section attribute-error" id="attribute-missing"><h3>Required attribute <code><var>$0</var></code>
+ <div class="section" id="attribute-missing"><h3>Required attribute <code><var>{text}</var></code>
    is not specified.</h3>
      <p>A required attribute is not specified.  The document
      is non-conforming.</p>
-Line 789 
 p {
+Line 1270 
 p {
      </dl>
    </div>
- <div class="section attribute-error" id="attribute-not-allowed"><h3>Attribute
+ <div class="section" id="attribute-missing:data|type"><h3>For an <code>object</code> at least one of
+   <code>data</code> and <code>type</code> attributes must be
+   specified.</h3></div>
+ <div class="section" id="attribute-missing:href|target"><h3>For a <code>base</code> element, at least one of
+   <code>href</code> and <code>target</code> attributes must be
+   specified.</h3></div>
+ <div class="section" id="attribute-missing:name|http-equiv"><h3>For a <code>meta</code> element with the
+   <code>content</code> attribute specified, exactly one of
+   <code>name</code> and <code>http-equiv</code> attributes must be
+   specified.</h3></div>
+ <div class="section" id="attribute-missing:name|http-equiv|charset"><h3>For a <code>meta</code> element, exactly one of
+   <code>name</code>, <code>http-equiv</code>, and <code>charset</code>
+   attributes must be specified.</h3></div>
+ <div class="section" id="attribute-not-allowed"><h3>Attribute
    <code><var>{local-name}</var></code> is not allowed for
    <code><var>{element-local-name}</var></code> element.</h3>
      <p>An attribute is specified where it is not allowed.
-Line 803 
 p {
+Line 1301 
 p {
      </dl>
    </div>
- <div class="section attribute-error" id="in-HTML:xml:lang"><h3>The <code>xml:lang</code> attribute is not
+ <div class="section" id="attribute-not-allowed:ismap"><h3>The <code>ismap</code> attribute may only be
-   allowed in HTML document.</h3>
+   used for the image contained in an <code>a</code> element.</h3></div>
-     <p>The <code>xml:lang</code> attribute is not allowed in
-     HTML document.  The document is non-conforming.</p>
+ <div class="section" id="attribute-not-defined"><h3>This attribute is not defined.</h3>
+     <p>The attribute is not one of attributes allowed for the element
+     in the latest version of relevant specifications.</p>
+     <p>The attribute cannot be used.</p>
+     <dl class="switch">
+     <dt><code>align</code> attribute (various HTML elements)</dt>
+     <dt><code>border</code> attribute (various HTML elements)</dt>
+       <dd>These attributes are no longer part of HTML.  You can use CSS
+       properties to control the presentation of the element.</dd>
+     <dt><code>autosubmit</code> attribute (<code>menu</code> element)</dt>
+       <dd>The attribute was part of HTML5 draft but then dropped.
+       Similar functionality can be implemented by scripts.</dd>
+     <dt><code>language</code> attribute (<code>script</code> element)</dt>
+       <dd>The attribute is no longer the standard way to specify the
+       scripting language.  If you are using JavaScript, then no explicit
+       specification of the scripting language is necessary, so you can
+       write the element like:
+         <p><code class="html example code">&lt;script&gt;<br><!--
+         --> /* JavaScript code */<br><!--
+         -->&lt;/script&gt;</code></p>
+       If you are using different scripting language from JavaScript, or
+       you want to declare the scripting language explicitly, you should
+       use the <code>type</code> attribute, as follows:
+         <dl class="switch">
+         <dt>JavaScript</dt>
+           <dd>Use
+           <code class="html example">&lt;script type="text/javascript"&gt;</code>.</dd>
+         <dt>VBScript</dt>
+           <dd>Use
+           <code class="html example">&lt;script type="text/vbscript"&gt;</code>.</dd>
+         </dl>
+       </dd>
+     </dl>
+   </div>
-     <p>Use of the <code>xml:lang</code> attribute is conforming
+ <div class="section" id="in-HTML:xml:lang"><h3>The <code>xml:lang</code> attribute in HTML
-     <em>only</em> in XML documents.</p>
+   document is ignored.</h3>
+     <p>The <code>xml:lang</code> attribute does not have an effect in
+     HTML document.</p>
+     <p>The <code>xml:lang</code> attribute is only applicable to XML
+     documents.  In HTML document, it is only allowed to ease migration
+     from XML.</p>
      <p>To specify natural language information in HTML document,
      use <code>lang</code> attribute instead.</p>
-Line 824 
 p {
+Line 1363 
 p {
           from an HTML document? -->
    </div>
- <div class="section attribute-error" id="in-XML:charset"><h3>The <code>charset</code> attribute is not
+ <div class="section" id="in-XML:charset"><h3>The <code>charset</code> attribute is not
    allowed in XML document.</h3>
      <p>The <code>charset</code> attribute of a
      <code>meta</code> element is not allowed in XML document.
-Line 833 
 p {
+Line 1372 
 p {
      <p>To specify the character encoding used for serialization,
      if necessary, use XML declaration instead:
        <pre class="xml example">
- <code>&lt;?xml version=&quot;1.0&quot; encoding=&quot;<var>encoding-name</var>&quot;?&gt;</code></pre>
+ <code>&lt;?xml version="1.0" encoding="<var>encoding-name</var>"?&gt;</code></pre>
      </p>
    </div>
- <div class="section attribute-error" id="in-XML:lang"><h3>The <code>lang</code> attribute is not
+ <div class="section" id="in-XML:noscript"><h3>A <code>noscript</code> element cannot be
-   allowed in XML document.</h3>
+   used in XML document.</h3></div>
-     <p>The HTML <code>lang</code> attribute is not allowed in
-     XML document.  The document is non-conforming.</p>
-     <p>The <code>lang</code> attribute in <code>null</code>
+ <div class="section" id="in-XML:xml:lang"><h3>The <code>xml:lang</code> attribute in no namespace
-     namespace for HTML elements is conforming <em>only</em> in
+   is only allowed in HTML document.</h3></div>
-     HTML documents.</p>
-     <p>To specify natural language information in XML document,
+ <div class="section" id="in-XML:xmlns"><h3>The <code>xmlns</code> attribute
-     use <code>xml:lang</code> attribute instead.</p>
-   </div>
- <div class="section attribute-error" id="in-XML:xmlns"><h3>The <code>xmlns</code> attribute
    in the <code>null</code> namespace is not allowed in
    XHTML document.  The document is non-conforming.</h3>
      <p>The <code>xmlns</code> attribute in the <code>null</code>
-Line 860 
 p {
+Line 1392 
 p {
      static documents.</p>
    </div>
+ <div class="section" id="xml:lang-not-allowed"><h3>The <code>xml:lang</code> attribute is only allowed
+   when the <code>lang</code> attribute is specified.</h3></div>
  </section>
  <section id="attribute-value-errors">
  <h2>Attribute Value Errors</h2>
- <div class="section attribute-value-warning warning" id="w:charset:not-registered"><h3>Character encoding name <code><var>$0</var></code>
+ <div class="section" id="boolean:invalid"><h3>Attribute value <code><var>{@}</var></code>
-   is not registered.</h3>
+   is not allowed.  It must be an empty string or a string
+   <code><var>{local-name}</var></code>.</h3></div>
+ <div class="section" id="char:syntax-error"><h3>The attribute value must be exactly one
+   character.</h3></div>
+ <div class="section" id="charref-in-charset"><h3>A character reference cannot be used to
+   represent a character encoding name.</h3></div>
+ <div class="section" id="charset:not-preferred"><h3>Character encoding name
+   <code><var>{value}</var></code> is not the preferred name of that
+   character encoding.</h3></div>
+ <div class="section" id="charset:not-registered"><h3>Character encoding name
+   <code><var>{value}</var></code> is not a registered name.</h3>
      <p>The specified character encoding name is not registered to
      <abbr>IANA</abbr>.  Use of registered character encoding name
      is a good practice to facilitate interoperability.</p>
-Line 907 
 p {
+Line 1456 
 p {
      name database of the conformance checker is not complete yet.</p>
    </div>
- <div class="section attribute-value-warning warning" id="w:charset:private"><h3><code><var>$0</var></code> is a private
+ <div class="section" id="charset:private"><h3>Character encoding name
-   character encoding name.</h3>
+   <code><var>{value}</var></code> is a private name.</h3>
      <p>The specified character encoding name is a private name and
      not registered to <abbr>IANA</abbr>.  Use of registered character
      encoding name is a good practice to facilitate interoperability.</p>
-Line 925 
 p {
+Line 1474 
 p {
      </dl>
    </div>
- <div class="section attribute-value-error" id="m:charset:syntax-error"><h3>The specified value is syntactically not a
+ <div class="section" id="charset:syntax-error"><h3>The specified value <code><var>{value}</var></code>
-   character encoding name.</h3>
+   is syntactically not a character encoding name.</h3>
      <p>The attribute value must be a character encoding name.  However,
      the specified value is not a character encoding name syntactically.
      The document is non‐conforming.</p>
-Line 934 
 p {
+Line 1483 
 p {
      printable characters, up to 40 characters.</p>
    </div>
- <div class="section attribute-value-error" id="enumerated:invalid"><h3>This attribute only allow a limited set of
+ <div class="section" id="color:syntax-error"><h3>The specified value is not a color
+   name or hexadecimal color number.</h3></div>
+ <div class="section" id="coords:number-not-3"><h3>The <code>coords</code> attribute have to
+   contain three (3) numbers (specified:
+   <code><var>{text}</var></code>).</h3></div>
+ <div class="section" id="coords:number-not-4"><h3>The <code>coords</code> attribute have to
+   contain four (4) numbers (specified:
+   <code><var>{text}</var></code>).</h3></div>
+ <div class="section" id="coords:number-lt-6"><h3>The <code>coords</code> attribute have to
+   contain more than or equal to six (6) numbers (specified:
+   <code><var>{text}</var></code>).</h3></div>
+ <div class="section" id="coords:number-not-even"><h3>The <code>coords</code> attribute have to
+   contain even number of numbers (specified:
+   <code><var>{text}</var></code>).</h3></div>
+ <div class="section" id="coords:out-of-range"><h3>The specified value <code><var>{value}</var></code>
+   is out of range.</h3></div>
+ <div class="section" id="coords:syntax-error"><h3>The specified value is not valid.</h3></div>
+ <div class="section" id="datetime:bad-year"><h3>Year number is out of range.</h3></div>
+ <div class="section" id="datetime:bad-month"><h3>Month number is out of range.</h3></div>
+ <div class="section" id="datetime:bad-day"><h3>Day number is out of range.</h3></div>
+ <div class="section" id="datetime:bad-hour"><h3>Hour number is out of range.</h3></div>
+ <div class="section" id="datetime:bad-minute"><h3>Minute number is out of range.</h3></div>
+ <div class="section" id="datetime:bad-second"><h3>Second number is out of range.</h3></div>
+ <div class="section" id="datetime:bad-timezone-hour"><h3>Hour number of the timezone component is out of
+   range.</h3></div>
+ <div class="section" id="datetime:bad-timezone-minute"><h3>Minute number of the timezone component is out of
+   range.</h3></div>
+ <div class="section" id="datetime:syntax-error"><h3>The attribute value is not a datetime.</h3></div>
+ <div class="section" id="dateortime:syntax-error"><h3>The value is not a date or time.</h3></div>
+ <div class="section" id="enumerated:invalid"><h3>This attribute only allow a limited set of
    values and the specified value <code><var>{@}</var></code> is not one
    of them.</h3>
      <p>For this attribute only several values are allowed and the
-Line 948 
 p {
+Line 1543 
 p {
          <p>Value <code>Content-Type</code> is obsolete; for charset
          declaration, the <code>charset</code> attribute can be used as:
          <pre class="html example">
- <code>&lt;meta charset=&quot;<var>charset-name</var>&quot;&gt;</code></pre>
+ <code>&lt;meta charset="<var>charset-name</var>"&gt;</code></pre>
          ... where <var>charset-name</var> is a name of the character encoding
          of the document, such as <code>utf-8</code>.</p>
          <p>Values <code>Content-Style-Type</code> and
-Line 962 
 p {
+Line 1557 
 p {
      </dl>
    </div>
- <div class="section attribute-value-error" id="enumerated:invalid:http-equiv:content-type"><h3>Character encoding declaration syntax
+ <div class="section" id="enumerated:invalid:http-equiv:content-type"><h3>Character encoding declaration syntax
-   <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>
+   <code class="html bad example">&lt;meta http-equiv="Content-Type" content="text/html; charset=<var>charset-name</var>"&gt;</code>
    is obsolete.</h3>
      <p>Old long character encoding declaration syntax
-     <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>
+     <code class="html bad example">&lt;meta http-equiv="Content-Type" content="text/html; charset=<var>charset-name</var>"&gt;</code>
      is in use.  The document is non‐conforming.</p>
      <p>The new character encoding declaration syntax is:
        <pre class="html example">
- <code>&lt;meta charset=&quot;<var>charset-name</var>&quot;&gt;</code></pre>
+ <code>&lt;meta charset="<var>charset-name</var>"&gt;</code></pre>
      </p>
    </div>
- <div class="section attribute-value-error" id="duplicate-ID"><h3>This identifier has already been
+ <div class="section" id="enumerated:non-conforming"><h3>Attribute value <code><var>{@}</var></code>
+   is not allowed.</h3></div>
+ <div class="section" id="duplicate-http-equiv"><h3>There is another pragma
+   <code><var>{value}</var></code>.</h3></div>
+ <div class="section" id="duplicate-ID"><h3>This identifier has already been
    assigned to another element.</h3></div>
- <div class="section attribute-value-error" id="link-type:bad-context"><h3>The link type <code><var>$0</var></code>
+ <div class="section" id="duplicate-token"><h3>The token <code><var>{value}</var></code>
+   appears in the attribute value twice.</h3></div>
+ <div class="section" id="empty-attribute-value"><h3>The attribute value is empty.</h3></div>
+ <div class="section" id="empty-style-sheet-title"><h3>The value of the <code>title</code> attribute
+   is empty.</h3>
+     <p>The <code>title</code> attribute value of the <code>link</code>
+     element that defines an alternate style sheet is an empty value.</p>
+     <p>A <code>link</code> element whose <code>rel</code> attribute
+     is <code>alternate stylesheet</code> defines an alternate style sheet.
+     An alternate style sheet must be associated with a name using the
+     <code>title</code> attribute.  The name cannot be empty.</p>
+   </div>
+ <div class="section" id="float:out-of-range"><h3>The specified value is out of range.</h3></div>
+ <div class="section" id="float:syntax-error"><h3>The attribute value is not a real
+   number.</h3></div>
+ <div class="section" id="fragment-points-itself"><h3>A fragment identifier references the element
+   itself.</h3></div>
+ <div class="section" id="fragment-points-nothing"><h3>A fragment identifier references no
+   node.</h3></div>
+ <div class="section" id="hashref:syntax-error"><h3>A hash−name reference must start with a
+   <code>#</code> character.</h3></div>
+ <div class="section" id="id-ne-name"><h3>The <code>id</code> attribute value is
+   different from the <code>name</code> attribute value.</h3></div>
+ <div class="section" id="integer:syntax-error"><h3>The attribute value is not an integer.</h3></div>
+ <div class="section" id="link-type:bad-context"><h3>The link type <code><var>{value}</var></code>
    cannot be specified for this element.</h3>
      <p>The specified link type cannot be used for the element.
      The document is non-conforming.</p>
-Line 991 
 p {
+Line 1627 
 p {
      while it cannot be used with <code>link</code> element.</p>
    </div>
- <div class="section attribute-value-error" id="link-type:non-conforming"><h3>The link type <code><var>$0</var></code>
+ <div class="section" id="invalid-attribute-value"><h3>Attribute value <code><var>{@}</var></code>
+   is not an allowed value.</h3></div>
+ <div class="section" id="length:syntax-error"><h3>The attribute value is not a length
+   value.</h3></div>
+ <div class="section" id="link-type:non-conforming"><h3>The link type <code><var>{value}</var></code>
    is non-conforming.</h3>
      <p>The specified link type is non-conforming, and therefore
      the document is non-conforming.</p>
-Line 1012 
 p {
+Line 1654 
 p {
      </dl>
    </div>
- <div class="section attribute-value-error" id="m:mismatched-charset-name"><h3>Character encoding name <code><var>$1</var></code>
+ <div class="section" id="meta-content-type-syntax-error"><h3>The specified value is not a valid as a long
-   is different from document character encoding
+   character encoding declaration.</h3></div>
-   <code><var>$0</var></code>.</h3>
+ <div class="section" id="mismatched-charset-name"><h3>The specified character encoding name
+   <code><var>{value}</var></code> is different from the actual document
+   character encoding <code><var>{text}</var></code>.</h3>
      <p>The specified character encoding name is different from
      the character encoding of the document.  The document
      is non‐conforming.</p>
    </div>
- <div class="section attribute-value-error" id="reserved-browsing-context-name"><h3>Browsing context name
+ <div class="section" id="mismatched-charset-name-not-checked"><h3>Whether the specified character encoding name
+   <code><var>{value}</var></code> matches to the actual character encoding
+   name cannot be checked since the input is not a byte stream.</h3></div>
+ <div class="section" id="mode:syntax-error"><h3>The attribute value is not a valid mode
+   name.</h3></div>
+ <div class="section" id="nninteger:out-of-range"><h3>The specified value is out of range.</h3></div>
+ <div class="section" id="nninteger:syntax-error"><h3>The attribute value is not a non‐negative
+   integer.</h3></div>
+ <div class="section" id="no-referenced-map"><h3>The <code>usemap</code> attribute references
+   no image map.</h3></div>
+ <div class="section" id="no-referenced-menu"><h3>The <code>contextmenu</code> attribute references
+   no menu.</h3></div>
+ <div class="section" id="no-referenced-header-cell"><h3>There is no table header cell whose <code>id</code>
+   is <code><var>{value}</var></code> in the same table.</h3></div>
+ <div class="section" id="refresh:syntax-error"><h3>the specified value is not a valid as part
+   of a <code>Refresh</code> pragma.</h3></div>
+ <div class="section" id="repeat:syntax-error"><h3>The attribute value is not an integer or
+   a string <code>template</code>.</h3></div>
+ <div class="section" id="reserved-browsing-context-name"><h3>Browsing context name
    <code><var>{@}</var></code> is reserved.</h3>
      <p>The specified browsing context name is reserved.
      The document is non-conforming.</p>
-Line 1036 
 p {
+Line 1708 
 p {
      However, they are <em>not</em> conforming attribute values.</p>
    </div>
- </section>
+ <div class="section" id="Reserved-Prefixes-and-Namespace-Names:Name"><h3>Namespace name <code><var>{text}</var></code>
+   is reserved and cannot be used for an arbitrary prefix.</h3></div>
- <section id="attribute-value-warnings">
+ <div class="section" id="Reserved-Prefixes-and-Namespace-Names:Prefix"><h3>Namespace prefix <code><var>{text}</var></code>
- <h2>Attribute Value Warnings</h2>
+   is reserved and cannot be used for an arbitrary namespace name.</h3></div>
- <div class="section attribute-value-warning should" id="s:link-type:proposed"><h3>Link type <code><var>$0</var></code>
+ <div class="section" id="link-type:proposed"><h3>Link type <code><var>{value}</var></code>
    is proposed but not accepted yet; it <em>should not</em> be
    used until it has been accepted.</h3>
      <p>The link type is in the <i>proposed</i> status; it
-Line 1055 
 p {
+Line 1728 
 p {
      for the latest information.</p>
    </div>
+ <div class="section" id="sizes:syntax-error"><h3>The specified value <code><var>{value}</var></code>
+   is not a valid value.</h3></div>
+ <div class="section" id="space-in-ID"><h3>White space characters are not allowed
+   in the <code>id</code> attribute.</h3></div>
+ <div class="section" id="template:not-template"><h3>The node referenced by the <code>template</code>
+   attribute is not a template.</h3></div>
+ <div class="section" id="window-name:empty"><h3>Browsing context name must not be empty.</h3></div>
+ <div class="section" id="window-name:reserved"><h3>Browsing context name
+   <code><var>{value}</var></code> is reserved.</h3></div>
+ <div class="section" id="word-not-allowed"><h3>The word <code><var>{value}</var></code> is not
+   allowed in this attribute.</h3></div>
+ <div class="section" id="XML-1.0-NCName:syntax-error"><h3>The specified value is not a legal XML Namespaces
+.0 <code>NCName</code>.</h3></div>
+ <div class="section" id="xml:lang-ne-lang"><h3>The value of the <code>xml:lang</code> attribute
+   is different from the value of the <code>lang</code> attribute.</h3>
+     <p>The value of the <code>xml:lang</code> attribute (either the
+     <code>lang</code> attribute in the <code>xml</code> (i.e.
+     <code>http://www.w3.org/XML/1998/namespace</code>) namespace, or
+     the <code>xml:lang</code> attribute in no namespace) for the element has
+     different value than that of the <code>lang</code> attribute in no
+     namespace.</p>
+     <p>For historical reason, there are two attributes applicable to HTML
+     elements to specify language information of an element: <code>lang</code>
+     and <code>xml:lang</code>.  In HTML documents, only <code>lang</code>
+     attribute in no namespace is allowed and take effect; the
+     <code>xml:lang</code> attribute in no namespace is ignored in HTML
+     documents.  In XHTML documents, both <code>lang</code> and
+     <code>xml:lang</code> attributes are allowed.</p>
+     <p>In general, <em>only the <code>lang</code> attribute</em> need to be
+     specified for an element.</p>
+     <p>If both <code>lang</code> and <code>xml:lang</code> attributes are
+     specified on the same element, their values must be the same value.</p>
+   </div>
  </section>
  <section id="table-model-errors">
  <h2>Table Model Errors</h2>
- <div class="section table-model-error" id="table:colspan-creates-column-with-no-anchored-cell"><h3>This <code>colspan</code> attribute
+ <div class="section" id="cell-overlapping"><h3>Cell slot (<var>{text}</var>) is filled by
+   multiple cells.</h3></div>
+ <div class="section" id="colspan-creates-column-with-no-anchored-cell"><h3>This <code>colspan</code> attribute
    results in creating a table column that does not contain
    any cell anchored to it.</h3></div>
- <div class="section table-model-error" id="table:no-cell-in-last-row"><h3>The table has no cell (<code>td</code> or
+ <div class="section" id="column-with-no-anchored-cell"><h3>This column has no anchored cell.</h3></div>
+ <div class="section" id="table:no-cell-in-last-row"><h3>The table has no cell (<code>td</code> or
    <code>th</code>) in the last row.</h3></div>
- <div class="section table-model-error" id="table:rowspan-extends-table"><h3>This <code>rowspan</code> attribute
+ <div class="section" id="table:rowspan-extends-table"><h3>This <code>rowspan</code> attribute
    results in creating a table row that does not contain
    any cell anchored to it.</h3>
      <p>The <code>rowspan</code> attribute value of the cell
-Line 1086 
 p {
+Line 1808 
 p {
      a cell that spans between first and second rows.</p>
    </div>
+ <div class="section" id="row-with-no-anchored-cell"><h3>This row has no anchored cell.</h3></div>
+ <div class="section" id="rowspan-creates-row-with-no-anchored-cell"><h3>This <code>rowspan</code> attribute
+   results in creating a table row that does not contain
+   any cell anchored to it.</h3></div>
  </section>
  <section id="imt-warnings">
- <h2>Internet Media Type Warnings</h2>
+ <h2>Internet Media Type Errors</h2>
+ <div class="section" id="boundary:syntax-error"><h3>The specified value is not a valid value
+   as a multipart boundary.</h3></div>
+ <div class="section" id="e4x:syntax-error"><h3>The specified value is not a valid value
+   for the attribute <code>e4x</code>.</h3></div>
+ <div class="section" id="IMT:attribute-syntax-error"><h3>The specified value,
+   <code><var>{value}</var></code>, is syntactically not a valid
+   attribute name.</h3></div>
+ <div class="section" id="IMT:composite"><h3>The specified media type is a composite
+   type, which is not allowed in this context.</h3></div>
- <div class="section should" id="s:IMT:obsolete-subtype"><h3><code><var>{@}</var></code>: An <em>obsolete</em>
+ <div class="section" id="IMT:limited-use-subtype"><h3>An Internet Media Type whose intended usage
-   subtype is used.</h3></div>
+   is limited use, <code><var>{value}</var></code> is used.</h3></div>
- <div class="section should" id="s:IMT:private-subtype"><h3><code><var>{@}</var></code>: A private
+ <div class="section" id="IMT:syntax-error"><h3>The specified value is not an Internet Media
-   (<code>x-</code> or <code>x.</code>) subtype is used.</h3></div>
+   Type.</h3></div>
+ <div class="section" id="IMT:obsolete-parameter"><h3>An obsolete parameter
+   <code><var>{value}</var></code> is used.</h3></div>
+ <div class="section" id="IMT:obsolete-subtype"><h3>An obsolete Internet Media Type
+   <code><var>{value}</var></code> is used.</h3>
+     <p>The specified Internet Media Type is registered with its intended
+     usage as <i>OBSOLETE</i>.</p>
+     <dl class="swtich">
+     <dt>Media type <code>text/ecmascript</code></dt>
+       <dd>Media type <code>text/ecmascript</code> is obsoleted in
+       favor of <code>application/ecmascript</code>.  Note that
+       <em><code>text/javascript</code></em> would be the better alternative
+       in many cases.</dd>
+     <dt>Media type <code>text/javascript</code></dt>
+       <dd>Media type <code>text/javascript</code> is obsoleted by
+       <abbr>IETF</abbr> with backward incompatible alternate
+       <code>application/javascript</code> for architectural
+       purity.<!-- @@ ref? -->  Those who prefer reality to academic
+       purity <em>may ignore</em> this warning.</dd>
+     </dl>
+   </div>
- <div class="section should" id="s:IMT:unregistered-subtype"><h3><code><var>{@}</var></code>: The subtype is
+ <div class="section" id="IMT:parameter-missing"><h3>Parameter <code><var>{text}</var></code> have to
-   not registered to IANA.</h3></div>
+   be specified for the Internet Media Type
+   <code><var>{value}</var></code>.</h3></div>
+ <div class="section" id="IMT:parameter-not-allowed"><h3>Parameter <code><var>{value}</var></code> is not
+   allowed for this Internet Media Type.</h3></div>
+ <div class="section" id="IMT:private-subtype"><h3>Use of a private Internet Media Type
+   <code><var>{value}</var></code> is not encouraged.</h3></div>
+ <div class="section" id="IMT:private-type"><h3>Use of a private type
+   <code><var>{value}</var></code> is not encouraged.</h3></div>
+ <div class="section" id="IMT:subtype-syntax-error"><h3>Value <code><var>{value}</var></code> is
+   syntactically not a valid subtype value of an Internet Media Type.</h3></div>
+ <div class="section" id="IMT:type-syntax-error"><h3>Value <code><var>{value}</var></code> is
+   syntactically not a valid type.</h3></div>
+ <div class="section" id="IMT:unknown-parameter"><h3>An unknown parameter <code><var>{value}</var></code>
+   is used.  The conformance checker cannot determine whether use of this
+   parameter is valid or not.</h3></div>
+ <div class="section" id="IMT:unknown-subtype"><h3>An unknown Internet Media Type
+   <code><var>{value}</var></code> is used.  At the time of the update of
+   the conformance checker's Internet Media Type database, the subtype is
+   not reigstered to the IANA registry.  The subtype, however, might be
+   registerd to the IANA registry thereafter.  Please consult the IANA
+   registry.</h3></div>
+ <div class="section" id="IMT:unregistered-subtype"><h3>Use of an Internet Media Type
+   <code><var>{value}</var></code> is not encouraged since it is not
+   part of the IANA registry.</h3></div>
+ <div class="section" id="IMT:unregistered-type"><h3>Use of a type
+   <code><var>{value}</var></code> is not encouraged since it is not
+   a standardized type.</h3></div>
+ <div class="section" id="not-IMT"><h3>A value that is not an Internet Media Type
+   is not allowed here.</h3></div>
  </section>
  <section id="uri-errors">
- <h2>URI (or IRI) Errors</h2>
+ <h2>URL Errors</h2>
+ <div class="section" id="syntax-error:iri3987"><h3>The specified value is syntactically not an
+   IRI.</h3></div>
- <div class="section must" id="m:URI::syntax-error"><h3>The specified value is syntactically not an IRI
+ <div class="section" id="syntax-error:iriref3987"><h3>The specified value is syntactically not an IRI
    reference.</h3>
      <p>The specified value does not satisfy the syntactical requirements
      for IRI references.  The document is non-conforming.</p>
-Line 1120 
 p {
+Line 1926 
 p {
      </p>
    </div>
- </section>
+ <div class="section" id="syntax-error:rdfuriref"><h3>The specified value is syntactically not an RDF
+   URI reference.</h3></div>
+ <div class="section" id="syntax-error:uri2396"><h3>The specified value is syntactically not a
+   URI according to RFC 2396.</h3></div>
+ <div class="section" id="syntax-error:uri3986"><h3>The specified value is syntactically not a
+   URI.</h3></div>
- <section id="uri-shoulds">
+ <div class="section" id="URL:address-format"><h3>URL host address format
- <h2>URI (or IRI) Should-level Errors</h2>
+   <code><var>{text}</var></code> is not defined.</h3></div>
- <div class="section should" id="s:URI::dot-segment"><h3>A dot-segment (<code>.</code> or
+ <div class="section" id="URL:default-port"><h3>Default port number should be omitted.</h3></div>
+ <div class="section" id="URL:dot-segment"><h3>A dot-segment (<code>.</code> or
    <code>..</code>) occurs in an absolute reference.</h3>
      <p>Dot-segment (<code>.</code> or <code>..</code>) should
      not occur in an absolute reference.</p>
-Line 1137 
 p {
+Line 1952 
 p {
      canonical form before it has been published.</p>
    </div>
- <div class="section should" id="s:URI::empty-path"><h3>This IRI does not end with
+ <div class="section" id="URL:empty-host"><h3>The host component of the URL is empty.</h3></div>
-   a <code>/</code>.</h3></div>
+ <div class="section" id="URL:empty-path"><h3>The URL does not end with
+   a <code>/</code> character.</h3></div>
+ <div class="section" id="URL:empty-port"><h3>The port component of the URL is empty.</h3></div>
+ <div class="section" id="URL-fragment-not-allowed"><h3>The fragment component of the URL is not
+   allowed.</h3></div>
+ <div class="section" id="URL:long-host"><h3>The host component of the URL
+   is too long.</h3></div>
- <div class="section should" id="s:URI::lowercase-hexadecimal-digit"><h3>A lowercase hexadecimal digit is used
+ <div class="section" id="URL:lowercase-hexadecimal-digit"><h3>A lowercase hexadecimal digit is used
    in percent-encoding.</h3>
      <p>The hexadecimal digit in percent-encoding string in the IRI
      is in lowercase.  Though the IRI <em>is</em> conforming,
      it should be in uppercase.</p>
    </div>
- <div class="section should" id="s:URI::percent-encoded-unreserved"><h3>An unreserved character is
+ <div class="section" id="URL:non-DNS-host"><h3>The host component of the URL
+   is not a DNS host name.</h3></div>
+ <div class="section" id="URL:non-UTF-8-host"><h3>The host component of the URL
+   is not encoded in UTF-8.</h3></div>
+ <div class="section" id="URL:password"><h3>Password should not be included in a URL
+   for the security.</h3></div>
+ <div class="section" id="URL:percent-encoded-unreserved"><h3>An unreserved character is
    percent-encoded.</h3>
      <p>An unreserved character is percent-encoded in the IRI.
      Though it <em>is</em> conforming, it should be in the
      decoded (or bare) form.</p>
    </div>
- <div class="section should" id="s:URI::uppercase-scheme-name"><h3>URI scheme name is in uppercase.</h3>
+ <div class="section" id="URL:uppercase-host"><h3>The host <code><var>{value}</var></code>
+   should be spelt in lowercase.</h3></div>
+ <div class="section" id="URL:uppercase-scheme-name"><h3>URL scheme name is in uppercase.</h3>
      <p>The scheme part of the IRI is written in uppercase letter.</p>
      <p>Uppercase scheme names are not required to be processed
-Line 1172 
 p {
+Line 2009 
 p {
  </section>
+ <section id="mq-errors">
+ <h2>Media Query Errors</h2>
+ <div class="section" id="mq-syntax-error"><h3>The specified value has a syntax error as a
+   media query.</h3></div>
+ <div class="section" id="unknown-media-type"><h3>Media type <code><var>{value}</var></code> is
+   not supported by the conformance checker.</h3></div>
+ </section>
+ <section id="selectors-errors">
+ <h2>Selectors Errors</h2>
+ <div class="section" id="an+b-not-closed"><h3>Argument list of the pseudo-class is
+   not closed by a <code>)</code> character.</h3></div>
+ <div class="section" id="ab+b-not-integer"><h3>Numbers in the argument
+   <code><var>a</var>n+<var>b</var></code> have to be integers.</h3></div>
+ <div class="section" id="an+b-syntax-error"><h3>Argument <code><var>a</var>n+<var>b</var></code> is
+   syntactically incorrect.</h3></div>
+ <div class="section" id="attr-selector-not-closed"><h3>Attribute selector is not closed by
+   a <code>]</code> character.</h3></div>
+ <div class="section" id="lang-selector-not-closed"><h3>Argument list of the <code>:lang</code>
+   selector is not closed by a <code>)</code> character.</h3></div>
+ <div class="section" id="namespace-prefix:not-declared"><h3>Namespace prefix <code><var>{value}</var></code>
+   is not declared.</h3></div>
+ <div class="section" id="no-attr-local-name"><h3>Attribute local name is missing.</h3></div>
+ <div class="section" id="no-attr-match"><h3>Attribute matching operator (e.g.
+   <code>=</code>) is missing.</h3></div>
+ <div class="section" id="no-attr-name"><h3>Attribute name is missing.</h3></div>
+ <div class="section" id="no-attr-namespace-separator"><h3>Attribute namespace wildcard <code>*</code>
+   is not followed by a <code>|</code> character.</h3></div>
+ <div class="section" id="no-attr-value"><h3>Attribute value is missing.</h3></div>
+ <div class="section" id="no-class-name-selector"><h3>Class name is missing.</h3></div>
+ <div class="section" id="no-combinator"><h3>Combinator is missing.</h3></div>
+ <div class="section" id="no-contains-string"><h3>No string is specified in the argument
+   list of the <code>:-manakai-contains</code> pseudo-class
+   selector.</h3></div>
+ <div class="section" id="no-lang-tag"><h3>Language tag argument is missing.</h3></div>
+ <div class="section" id="no-local-name-selector"><h3>Local name part of the type selector (or
+   <code>*</code> for the universal selector) is missing.</h3></div>
+ <div class="section" id="no-pseudo-class-name"><h3>Pseudo-class name is missing.</h3></div>
+ <div class="section" id="no-pseudo-element-name"><h3>Pseudo-element name is missing.</h3></div>
+ <div class="section" id="no-sss"><h3>Sequence of simple selectors is
+   expected.</h3></div>
+ <div class="section" id="not-not-closed"><h3>Argument list of the <code>:not</code> selector
+   is not closed by a <code>)</code> character.</h3></div>
+ <div class="section" id="ss-after-pseudo-element"><h3>Simple selector is not allowed after a
+   pseudo element.</h3></div>
+ <div class="section" id="unknown-pseudo-class"><h3>Pseudo-class <code>:<var>{value}</var></code>
+   is not supported by the conformance checker.</h3></div>
+ <div class="section" id="unknown-pseudo-element"><h3>Pseudo-element <code>::<var>{value}</var></code>
+   is not supported by the conformance checker.</h3></div>
+ </section>
+ <section id="css-errors">
+ <h2>CSS Errors</h2>
+ <div class="section" id="at-rule-not-allowed"><h3>An <code>@<var>{text}</var></code> rule is not
+   allowed here.</h3></div>
+ <div class="section" id="at-rule-syntax-error"><h3>The <code>@<var>{text}</var></code> rule is
+   syntactically incorrect.</h3></div>
+ <div class="section" id="block-not-closed"><h3>Block is not closed before the end of
+   file.</h3></div>
+ <div class="section" id="CSS-duplication"><h3>Component <code>&lt;<var>{text}</var>&gt;</code> is
+   already specified.</h3></div>
+ <div class="section" id="CSS-cursor-hand"><h3>Value <code>hand</code> is not valid as
+   <code>&lt;'cursor'&gt;</code>.</h3></div>
+ <div class="section" id="CSS-syntax-error"><h3>Specified value is syntactically not a correct
+   <code>&lt;<var>{text}</var>&gt;</code>.</h3></div>
+ <div class="section" id="no-declaration-block"><h3>No declaration block is found after a group of
+   selectors.</h3></div>
+ <div class="section" id="no-property-colon"><h3>A <code>:</code> character is missing after
+   a property name.</h3></div>
+ <div class="section" id="no-property-name"><h3>Property name is expected.</h3></div>
+ <div class="section" id="no-property-semicolon"><h3>A <code>;</code> character is missing at the
+   end of the property.</h3></div>
+ <div class="section" id="priority-syntax-error"><h3>Priority part of the declaration is syntactically
+   incorrect.</h3></div>
+ <div class="section" id="unknown-at-rule"><h3>The <code>@<var>{value}</var></code> rule is
+   not supported by the conformance checker.</h3></div>
+ <div class="section" id="unknown-property"><h3>Property <code><var>{value}</var></code> is
+   not supported by the conformance checker.</h3></div>
+ </section>
  <section id="cache-manifest-errors">
  <h2>Cache Manifest Errors</h2>
- <div class="section must" id="m:not-manifest"><h3>This document is not a cache manifest.</h3>
+ <div class="section" id="both-in-entries-and-whitelist"><h3>This URL is found both in the explicit or
+   fallback entries and in the online whitelist.</h3></div>
+ <div class="section" id="different-origin-from-manifest"><h3>The specified URL has different origin from
+   the manifest.</h3></div>
+ <div class="section" id="different-scheme-from-manifest"><h3>The scheme component of the URL is
+   different from that of the manifest URL.  The URL is ignored.</h3></div>
+ <div class="section" id="duplicate-oc-namespace"><h3>This oppotunistic caching namespace is already
+   specified.</h3></div>
+ <div class="section" id="no-fallback-entry-URL"><h3>Fallback entry URL is missing.</h3></div>
+ <div class="section" id="not-manifest"><h3>This document is not a cache manifest.</h3>
      <p>The specified document is <em>not</em> a cache manifest.
      The document is non-conforming.</p>
-Line 1187 
 p {
+Line 2159 
 p {
      (exactly one space character between
      <code>CACHE</code> and <code>MANIFEST</code>).</p>
    </div>
+ <div class="section" id="same-as-manifest-URL"><h3>This URL is same as the manifest URL.</h3></div>
+ </section>
+ <section id="webidl-errors">
+ <h2>WebIDL Errors</h2>
+ <div class="section" id="after-argument"><h3>An argument name is not followed by a
+   <code>,</code> character or a <code>)</code> character.</h3></div>
+ <div class="section" id="after-exception-name"><h3>An exception name is not followed by a
+   <code>,</code> character or a <code>)</code> character.</h3></div>
+ <div class="section" id="after-unsigned"><h3>キーワード <code>unsigned</code> の後の字句が
+   <code>short</code> か <code>long</code> ではありません。</h3></div>
+ <div class="section" id="after-xattr"><h3>An extended attribute is not followed by
+   a <code>,</code> character or a <code>]</code> character.</h3></div>
+ <div class="section" id="argument-after-variadic"><h3>An argument is specified after an argument
+   with <code>Variadic</code> extended attribute is seen.</h3></div>
+ <div class="section" id="attr-not-readonly"><h3>Extended attribute <code><var>{text}</var></code> is
+   specified for an attribute that is not read-only.</h3></div>
+ <div class="section" id="attr-type-not-interface"><h3>Extended attribute <code><var>{text}</var></code>
+   is specified for an attribute whose type is not an interface.</h3></div>
+ <div class="section" id="before-exception-member"><h3>An unknown construct is found where an exception
+   member or a <code>}</code> character is expected.</h3></div>
+ <div class="section" id="before-interface-member"><h3>An unknown construct is found where an interface
+   member or a <code>}</code> character is expected.</h3></div>
+ <div class="section" id="before-webidl-block"><h3>An identifier for the <code><var>{text}</var></code>
+   is not followed by a <code>{</code> character.</h3></div>
+ <div class="section" id="before-webidl-def"><h3>An unknown construct is found after an
+   extended attribute list (where a <code>Definition</code> is
+   expected).</h3></div>
+ <div class="section" id="before-webidl-defs"><h3>An unknown construct is found where a
+   <code>Definition</code> (optionally preceded by an extended attribute list)
+   is expected.</h3></div>
+ <div class="section" id="before-webidl-type"><h3>The type for <code><var>{text}</var></code> is
+   not specified.</h3></div>
+ <div class="section" id="before-webidl-type:argument"><h3>The type for an argument is not
+   specified.</h3></div>
+ <div class="section" id="before-webidl-type:exception-member"><h3>The type for an exception member is not
+   specified.</h3></div>
+ <div class="section" id="before-xattr"><h3>No extended attribute is specified after
+   a <code>[</code> character.</h3></div>
+ <div class="section" id="before-xattrarg"><h3>No identifier is specified in an extended
+   attribute assignment.</h3></div>
+ <div class="section" id="const-value-out-of-range"><h3>The specified value <code><var>{value}</var></code>
+   is outside of the range of the type for the constant,
+   <code><var>{text}</var></code>.</h3></div>
+ <div class="section" id="const-type-mismatch"><h3>The type of the value,
+   <code><var>{value}</var></code>, is different from the type of the constant,
+   <code><var>{text}</var></code>.</h3></div>
+ <div class="section" id="duplicate-accessor"><h3>Extended attribute <code><var>{text}</var></code>
+   is already specified for another operation in the same interface.</h3></div>
+ <div class="section" id="duplicate-constructor-name"><h3>Constructor name <code><var>{value}</var></code>
+   specified by extended attribute <code><var>{text}</var></code> is already
+   used for an interface.</h3></div>
+ <div class="section" id="duplicate-member"><h3>Name <code><var>{text}</var></code> is
+   already used.</h3></div>
+ <div class="section" id="duplicate-qname"><h3>Qualified name <code><var>{text}</var></code> is
+   already used.</h3></div>
+ <div class="section" id="duplicate-xattr"><h3>Extended attribute <code><var>{text}</var></code>
+   is already specified.</h3></div>
+ <div class="section" id="exception-not-defined"><h3>Exception <code><var>{text}</var></code> is
+   not defined in the fragment.</h3></div>
+ <div class="section" id="interface-not-defined"><h3>Interface <code><var>{text}</var></code> is
+   not defined in the fragment.</h3></div>
+ <div class="section" id="no-arguments-in"><h3>No <code>in</code> keyword for an argument is
+   found.</h3></div>
+ <div class="section" id="no-arguments-lparen"><h3>No <code>(</code> character for an argument
+   list is found.</h3></div>
+ <div class="section" id="no-raises-lparen"><h3>A <code>raises</code> (or <code>getraises</code>
+   or <code>setraises</code>) keyword is not followed by a <code>(</code>
+   character.</h3></div>
+ <div class="section" id="no-sequence-gt"><h3>A <code>sequence&lt;&gt;</code> type is not
+   terminated by a <code>&gt;</code> character.</h3></div>
+ <div class="section" id="no-sequence-lt"><h3>Keyword <code>sequence</code> is not followed
+   by a <code>&lt;</code> character.</h3></div>
+ <div class="section" id="no-sequence-type"><h3>No type is specified in
+   <code>sequence&lt;&gt;</code>.</h3></div>
+ <div class="section" id="no-webidl-identifier"><h3>No identifier is specified for the
+   <code><var>{text}</var></code>.</h3></div>
+ <div class="section" id="no-webidl-identifier:argument"><h3>No identifier is specified for the
+   argument.</h3></div>
+ <div class="section" id="no-webidl-identifier:exception-member"><h3>No identifier is specified for the
+   exception member.</h3></div>
+ <div class="section" id="no-webidl-identifier:operation"><h3>No identifier is specified for the
+   operation.</h3></div>
+ <div class="section" id="no-webidl-semicolon"><h3>No semicolon is found at the end of the
+   definition or member.</h3></div>
+ <div class="section" id="non-module-definition"><h3>This definition is not part of any
+   module.</h3></div>
+ <div class="section" id="not-boxable-type"><h3>Type <code><var>{text}</var></code> cannot be
+   used in <code>valuetype</code>.</h3></div>
+ <div class="section" id="premature-end-of-webidl"><h3>The WebIDL fragment ends before all the blocks
+   are closed by <code>};</code> sequences.</h3></div>
+ <div class="section" id="referenced-attr-not-defined"><h3>Attribute <code><var>{value}</var></code> is
+   not defined in the interface specified for the attribute to which
+   extended attribute <code><var>{text}</var></code> is set.</h3></div>
+ <div class="section" id="scoped-name"><h3>A scoped name is expected here.</h3></div>
+ <div class="section" id="scoped-name:dcolon"><h3>A <code>::</code> token is not followed by
+   an identifier or a <code>DOMString</code> keyword.</h3></div>
+ <div class="section" id="type-not-defined"><h3>Type <code><var>{text}</var></code> is not
+   defined.</h3></div>
+ <div class="section" id="typedef-ignored"><h3><code>typedef</code> of name <code>DOMString</code>
+   is ignored.</h3></div>
+ <div class="section" id="unknown-xattr"><h3>An unknown extended attribute
+   <code><var>{text}</var></code> is used.</h3></div>
+ <div class="section" id="valuetype-DOMString"><h3>The <code>valuetype</code> definition does
+   not define <code>DOMString</code> as
+   <code>sequence&lt;unsigned short&gt;</code>.</h3></div>
+ <div class="section" id="valuetype-ignored"><h3><code>valuetype</code> of name
+   <code>DOMString</code> is ignored.</h3></div>
+ <div class="section" id="wrong-signature-accessor"><h3>The operation cannot be used as accessor operation
+   of <code><var>{text}</var></code>, since its signature different from
+   the expected one.</h3></div>
+ <div class="section" id="xattr-arglist-not-allowed"><h3>Use of an argument list for extended attribute
+   <code><var>{text}</var></code> is not allowed.</h3></div>
+ <div class="section" id="xattr-for-wrong-type"><h3>Extended attribute <code><var>{text}</var></code>
+   is not applicable for an attribute whose type is not
+   <code>DOMString</code>.</h3></div>
+ <div class="section" id="xattr-id-missing"><h3>The identifier for extended attribute
+   <code><var>{text}</var></code> is not specified.</h3></div>
+ <div class="section" id="xattr-id-not-allowed"><h3>Use of an identifier for extended attribute
+   <code><var>{text}</var></code> is not allowed.</h3></div>
+ <div class="section" id="xattr-id-value-not-allowed"><h3>The identifier <code><var>{value}</var></code> is
+   not an allowed value for extended attribute
+   <code><var>{text}</var></code>.</h3></div>
+ <div class="section" id="xattr-not-applicable"><h3>Extended attribute <code><var>{text}</var></code>
+   is not applicable to this kind of object.</h3></div>
  </section>
  <section id="information">
  <h2>Stability Information</h2>
- <div class="section level-i" id="i:status:cr:element"><h3>This element is in the
+ <div class="section" id="deprecated:attr"><h3>This attribute is deprecated.</h3></div>
+ <div class="section" id="deprecated:element"><h3>This element is deprecated.</h3></div>
+ <div class="section" id="status:cr:element"><h3>This element is in the
    <strong>call for implementation</strong> stage.</h3>
      <p>The element is in the call for implementation stage.</p>
-Line 1205 
 p {
+Line 2364 
 p {
      (W3C Candidate Recommendation) belong to this class.</p>
    </div>
- <div class="section level-i" id="i:status:lc:element"><h3>This element is in the <strong>last
+ <div class="section" id="status:lc:element"><h3>This element is in the <strong>last
    call for comments</strong> stage.</h3>
      <p>The element is in the last call for comments stage.</p>
-Line 1219 
 p {
+Line 2378 
 p {
      defined by HTML5 belong to this class.</p>
    </div>
- <div class="section level-i" id="i:status:wd:element"><h3>This element is documented in a <strong>working
+ <div class="section" id="status:wd:element"><h3>This element is documented in a <strong>working
    draft</strong>.</h3>
      <p>The element is documented in a working or editor's draft
      and not yet completed.</p>
-Line 1231 
 p {
+Line 2390 
 p {
      <p>Most of new elements defined by HTML5 belong to this class.</p>
    </div>
- <div class="section level-i" id="i:status:non-standard:element"><h3>This element is <strong>not part of any
+ <div class="section" id="status:non-standard:element"><h3>This element is <strong>not part of any
    standard</strong> the conformance checker knows.</h3>
      <p>The element is not part of any standard or draft the conformance
      checker is aware of.</p>
-Line 1239 
 p {
+Line 2398 
 p {
      <p>The element should not be used for any practical purpose unless
      there is really a standard that defines the element.</p>
    </div>
+ <div class="section" id="status:cr:attr"><h3>This attribute is in the
+   <strong>call for implementation</strong> stage.</h3>
+     <p>The attribute is in the call for implementation stage.</p>
+     <p>Usually, using the attribute is safe.  However, it is a new feature
+     so that it might not be implemented correctly.  If it is found that
+     the feature is hard or impossible to implement, the feature
+     might be revised, or in some case it might be dropped.</p>
+   </div>
+ <div class="section" id="status:lc:attr"><h3>This attribute is in the <strong>last
+   call for comments</strong> stage.</h3>
+     <p>The attribute is in the last call for comments stage.</p>
+     <p>The attribute is relatively mature, though the standardization
+     is not done yet.  It may be used for experiments.  Since it is a new
+     feature, it might not be implemented correctly or at all.  If it is
+     found that the feature is hard or impossible to implement, the feature
+     might be revised or might be dropped.</p>
+   </div>
+ <div class="section" id="status:wd:attr"><h3>This attribute is documented in a <strong>working
+   draft</strong>.</h3>
+     <p>The attribute is documented in a working or editor's draft
+     and not yet completed.</p>
+     <p>The attribute should not be used for any practical purpose.
+     The feature might be drastically changed later or might be
+     entirely removed.</p>
+   </div>
+ <div class="section" id="status:non-standard:attr"><h3>This attribute is <strong>not part of any
+   standard</strong> the conformance checker knows.</h3>
+     <p>The attribute is not part of any standard or draft the conformance
+     checker is aware of.</p>
+     <p>The attribute should not be used for any practical purpose unless
+     there is really a standard that defines the attribute.</p>
+   </div>
+ </section>
+ <section id="langtag-errors">
+ <h2>Language Tag Errors</h2>
+ <div class="section" id="langtag:extension:duplication"><h3>There is another extension subtag
+   <code><var>{value}</var></code>.</h3></div>
+ <div class="section" id="langtag:illegal"><h3>Subtag <code><var>{value}</var></code> is
+   syntactically invalid.</h3></div>
+ <div class="section" id="langtag:language:case"><h3>It is a good practice to represent ISO 639-1
+   language code <code><var>{value}</var></code> in lowercase.</h3></div>
+ <div class="section" id="langtag:language:mul"><h3>Langauge tag <code>mul</code> should not be
+   used.</h3></div>
+ <div class="section" id="langtag:language:nosemantics"><h3>No semantics is defined for language subtag
+   <code><var>{value}</var></code>.</h3></div>
+ <div class="section" id="langtag:language:syntax"><h3>The language subtag <code><var>{value}</var></code>
+   is syntactically invalid.</h3></div>
+ <div class="section" id="langtag:language:und"><h3>Langauge tag <code>und</code> should not be
+   used.</h3></div>
+ <div class="section" id="langtag:private"><h3>It would be better if a private use language
+   tag (<code><var>{value}</var></code>) is not used.</h3></div>
+ <div class="section" id="langtag:privateuse:syntax"><h3>Private use subtag <code><var>{value}</var></code>
+   is syntactically invalid.</h3></div>
+ <div class="section" id="langtag:region:case"><h3>It is a good practice to represent ISO 3166
+   country code <code><var>{value}</var></code> in uppercase.</h3></div>
+ <div class="section" id="langtag:region:nosemantics"><h3>No semantics is defined for region subtag
+   <code><var>{value}</var></code>.</h3></div>
+ <div class="section" id="langtag:region:private"><h3>Use of private use country code
+   <code><var>{value}</var></code> is not allowed.</h3></div>
+ </section>
+ <section id="rdfxml-errors">
+ <h2>RDF/XML Errors</h2>
+ <div class="section" id="bad-rdf-namespace"><h3>The namespace URI of an element that
+   represents an RDF concept must be
+   <code>http://www.w3.org/1999/02/22-rdf-syntax-ns#</code>.</h3></div>
+ <div class="section" id="duplicate-rdf-id"><h3>The specified value is already used as an
+   ID.</h3></div>
+ <div class="section" id="duplicate-unqualified-attr"><h3>Both unqualified attribute and namespace‐qualified
+   RDF attribute are specified, which is not allowed.</h3></div>
+ <div class="section" id="parse-type-other"><h3>An invalid value is specified to
+   the <code>parseType</code> attribute.</h3></div>
+ <div class="section" id="second-node-element"><h3>There is another element, such that
+   this element is not allowed.</h3></div>
+ <div class="section" id="unqualified-attr"><h3>Unqualified attribute is not allowed.</h3></div>
+ <div class="section" id="unqualified-rdf-attr"><h3>RDF attribute should be
+   namespace‐qualified.</h3></div>
  </section>
  <section id="unsupported-messages">
  <h2><i>Unsupported</i> Messages</h2>
- <div class="section unsupported" id="unsupported:element"><h3>Conformance checking for element
+ <div class="section" id="unknown-element"><h3>Conformance checking for element
    <code><var>{local-name}</var></code> is not supported; <em>it might or
    might not be conforming</em>.</h3>
      <p>The conformant checker does not support the element.
      It cannot determine whether the document is conforming or not.</p>
    </div>
- <div class="section unsupported" id="unsupported:attribute"><h3>Conformance checking for attribute
+ <div class="section" id="unknown-attribute"><h3>Conformance checking for attribute
    <code><var>{local-name}</var></code> of element
    <code><var>{element-local-name}</var></code> is not supported;
    <em>it might or might not be conforming</em>.</h3>
-Line 1259 
 p {
+Line 2525 
 p {
      It cannot determine whether the document is conforming or not.</p>
    </div>
- <div class="section unsupported" id="unsupported:link-type"><h3>Link type <code><var>$0</var></code> is not
+ <div class="section" id="unknown-link-type"><h3>Link type <code><var>{value}</var></code> is not
    standardized or registered at the time of the release of the conformance
    checker; <em>it is non-conforming unless it now has been
    registered</em>.</h3>
-Line 1281 
 p {
+Line 2547 
 p {
      </dl>
    </div>
- <div class="section unsupported" id="unsupported:event-handler"><h3>Conformance checking for event handler attribute
+ <div class="section" id="event-handler"><h3>Conformance checking for event handler attribute
    is not supported; <em>it might or might not be conforming.</em></h3></div>
- <div class="section unsupported" id="unsupported:media-query"><h3>Conformance checking for media query
+ <div class="section" id="media-query"><h3>Conformance checking for media query
    is not supported; <em>it might or might not be conforming.</em></h3></div>
- <div class="section unsupported" id="unsupported:script"><h3>Conformance checking for script
+ <div class="section" id="addr-spec-not-supported"><h3>Conformance checking for an <code>addr-spec</code>
-   language <code><var>$0</var></code> is not supported;
+   is not supported; <em>it might or might not be conforming.</em></h3></div>
+ <div class="section" id="XML-script-lang"><h3>Conformance checking for script
+   language <code><var>{text}</var></code> is not supported;
    <em>it might or might not be conforming.</em></h3></div>
- <div class="section unsupported" id="unsupported:style"><h3>Conformance checking for style
+ <div class="section" id="XML-style-lang"><h3>Conformance checking for style
-   language <code><var>$0</var></code> is not supported;
+   language <code><var>{text}</var></code> is not supported;
    <em>it might or might not be conforming.</em></h3></div>
+ <div class="section" id="atom|content-not-supported"><h3>Conformance checking for an Atom
+   <code>content</code> element with <code>type</code>
+   <code><var>{text}</var></code> is not supported.</h3></div>
+ <div class="section" id="help-not-available"><h3>No more information is available.</h3>
+     <p>No more information is available for this topic.</p>
+   </div>
  </section>
- <section id="levels">
- <h2>Error Levels</h2>
- <table id="levels-table">
- <thead>
- <tr><th scope="col">Level</th>
- <th scope="col">Conforming?</th>
- <th scope="col">Description</th>
- </tr>
- </thead>
- <tbody>
- <tr class="level-m" id="level-m">
- <th scope="row"><em class="rfc2119">MUST</em>‐level error</th>
- <td>Non‐conforming.</td>
- <td>A violation to a hard requirement of the specification.
- The document is non‐conforming.</td>
- </tr>
- <tr class="level-s" id="level-s">
- <th scope="row"><em class="rfc2119">SHOULD</em>‐level error</th>
- <td>Non‐conforming, but <em>in some case</em>
- conforming.</td>
- <td>A violation to a requirement of the specification.
- The violation might be legitimize in some case.  Otherwise,
- the document is non‐conforming.</td>
- </tr>
- <tr class="level-w" id="level-w">
- <th scope="row">Warning</th>
- <td>Conforming.</td>
- <td>A warning is an advice from the conformance checker to avoid
- to solve a problem in a confusing or possibly wrong way.
- It does not affect to the conformance of the document, and
- may sometimes be inappropriate.</td>
- </tr>
- <tr class="level-i" id="level-i">
- <th scope="row">Information</th>
- <td>Conforming.</td>
- <td>An informational message just provides an additional information
- on the feature used in the document or the status of the retrieval
- or so on.
- It does not affect to the conformance of the document.</td>
- </tr>
- <tr class="level-u" id="level-u">
- <th scope="row">Not supported</th>
- <td><em>Unknown</em>.</td>
- <td>Some feature that is not supported by the conformance checker
- is used in the document.</td>
- </tr>
- </tbody>
- </table>
- </section>
+ <div class="section" id="Error-level-m"><h3><a href="../error-description#Error-level-m" rel="help"><em class="rfc2119">MUST</em>‐level
+         error</a></h3>
+     <p>A violation to a hard requirement of the specification.
+     The document is non‐conforming.</p>
+   </div>
+ <div class="section" id="Error-level-s"><h3><a href="../error-description#Error-level-s" rel="help"><em class="rfc2119">SHOULD</em>‐level
+         error</a></h3>
+     <p>A violation to a requirement of the specification.
+     The violation might be legitimize in some case.  Otherwise,
+     the document is non‐conforming.</p>
+   </div>
+ <div class="section" id="Error-level-w"><h3><a href="../error-description#Error-level-w" rel="help">Warning</a></h3>
+     <p>A warning is an advice from the conformance checker
+     to avoid solving a problem in a confusing or possibly wrong way.
+     It does not affect to the conformance of the document, and
+     may sometimes be inappropriate.</p>
+   </div>
+ <div class="section" id="Error-level-i"><h3><a href="../error-description#Error-level-i" rel="help">Information</a></h3>
+     <p>An informational message just provides an additional information
+     on the feature used in the document or the status of the retrieval
+     or so on.
+     It does not affect to the conformance of the document.</p>
+   </div>
+ <div class="section" id="Error-level-u"><h3><a href="../error-description#Error-level-u" rel="help">Not
+       supported</a></h3>
+     <p>Some feature that is not supported by the conformance checker
+     is used in the document.</p>
+   </div>
  <section id="license">
  <h2>License of This Document</h2>

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+Added in v.1.39

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