[giow] (0) Require an encoding declaration.

Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@7160 340c8d12-0b0e-0410-8428-c7bf67bfef74

complete.html

   the other is <meta charset>, and the encoding is UTF-8. -->
 
   <p>If an <a href=#html-documents title="HTML documents">HTML document</a> does not
-  start with a BOM, and if its encoding is not explicitly given by
-  <a href=#content-type title=Content-Type>Content-Type metadata</a>, and the
-  document is not <a href=#an-iframe-srcdoc-document>an <code>iframe</code> <code title=attr-iframe-srcdoc>srcdoc</code> document</a>, then the
+  start with a BOM, and its encoding is not explicitly given by <a href=#content-type title=Content-Type>Content-Type metadata</a>, and the document
+  is not <a href=#an-iframe-srcdoc-document>an <code>iframe</code> <code title=attr-iframe-srcdoc>srcdoc</code> document</a>, then the
   character encoding used must be an <a href=#ascii-compatible-character-encoding>ASCII-compatible character
-  encoding</a>, and, in addition, if that encoding isn't US-ASCII
-  itself, then the encoding must be specified using a
+  encoding</a>, and the encoding must be specified using a
   <code><a href=#the-meta-element>meta</a></code> element with a <code title=attr-meta-charset><a href=#attr-meta-charset>charset</a></code> attribute or a
   <code><a href=#the-meta-element>meta</a></code> element with an <code title=attr-meta-http-equiv><a href=#attr-meta-http-equiv>http-equiv</a></code> attribute in the
   <a href=#attr-meta-http-equiv-content-type title=attr-meta-http-equiv-content-type>Encoding declaration
   state</a>.</p>
 
+  <p class=note>A character encoding declaration is required (either
+  in the <a href=#content-type title=Content-Type>Content-Type metadata</a> or
+  explicitly in the file) even if the encoding is US-ASCII, because an
+  encoding is needed to process non-ASCII characters entered by the
+  user in forms, in URLs generated by scripts, and so forth.</p>
+
   <p>If the document is <a href=#an-iframe-srcdoc-document>an <code>iframe</code> <code title=attr-iframe-srcdoc>srcdoc</code> document</a>, the
   document must not have a <a href=#character-encoding-declaration>character encoding
   declaration</a>. (In this case, the source is already decoded,

index

   the other is <meta charset>, and the encoding is UTF-8. -->
 
   <p>If an <a href=#html-documents title="HTML documents">HTML document</a> does not
-  start with a BOM, and if its encoding is not explicitly given by
-  <a href=#content-type title=Content-Type>Content-Type metadata</a>, and the
-  document is not <a href=#an-iframe-srcdoc-document>an <code>iframe</code> <code title=attr-iframe-srcdoc>srcdoc</code> document</a>, then the
+  start with a BOM, and its encoding is not explicitly given by <a href=#content-type title=Content-Type>Content-Type metadata</a>, and the document
+  is not <a href=#an-iframe-srcdoc-document>an <code>iframe</code> <code title=attr-iframe-srcdoc>srcdoc</code> document</a>, then the
   character encoding used must be an <a href=#ascii-compatible-character-encoding>ASCII-compatible character
-  encoding</a>, and, in addition, if that encoding isn't US-ASCII
-  itself, then the encoding must be specified using a
+  encoding</a>, and the encoding must be specified using a
   <code><a href=#the-meta-element>meta</a></code> element with a <code title=attr-meta-charset><a href=#attr-meta-charset>charset</a></code> attribute or a
   <code><a href=#the-meta-element>meta</a></code> element with an <code title=attr-meta-http-equiv><a href=#attr-meta-http-equiv>http-equiv</a></code> attribute in the
   <a href=#attr-meta-http-equiv-content-type title=attr-meta-http-equiv-content-type>Encoding declaration
   state</a>.</p>
 
+  <p class=note>A character encoding declaration is required (either
+  in the <a href=#content-type title=Content-Type>Content-Type metadata</a> or
+  explicitly in the file) even if the encoding is US-ASCII, because an
+  encoding is needed to process non-ASCII characters entered by the
+  user in forms, in URLs generated by scripts, and so forth.</p>
+
   <p>If the document is <a href=#an-iframe-srcdoc-document>an <code>iframe</code> <code title=attr-iframe-srcdoc>srcdoc</code> document</a>, the
   document must not have a <a href=#character-encoding-declaration>character encoding
   declaration</a>. (In this case, the source is already decoded,

source

   the other is <meta charset>, and the encoding is UTF-8. -->
 
   <p>If an <span title="HTML documents">HTML document</span> does not
-  start with a BOM, and if its encoding is not explicitly given by
-  <span title="Content-Type">Content-Type metadata</span>, and the
-  document is not <span>an <code>iframe</code> <code
+  start with a BOM, and its encoding is not explicitly given by <span
+  title="Content-Type">Content-Type metadata</span>, and the document
+  is not <span>an <code>iframe</code> <code
   title="attr-iframe-srcdoc">srcdoc</code> document</span>, then the
   character encoding used must be an <span>ASCII-compatible character
-  encoding</span>, and, in addition, if that encoding isn't US-ASCII
-  itself, then the encoding must be specified using a
+  encoding</span>, and the encoding must be specified using a
   <code>meta</code> element with a <code
   title="attr-meta-charset">charset</code> attribute or a
   <code>meta</code> element with an <code
   title="attr-meta-http-equiv">http-equiv</code> attribute in the
   <span title="attr-meta-http-equiv-content-type">Encoding declaration
   state</span>.</p>
 
+  <p class="note">A character encoding declaration is required (either
+  in the <span title="Content-Type">Content-Type metadata</span> or
+  explicitly in the file) even if the encoding is US-ASCII, because an
+  encoding is needed to process non-ASCII characters entered by the
+  user in forms, in URLs generated by scripts, and so forth.</p>
+
   <p>If the document is <span>an <code>iframe</code> <code
   title="attr-iframe-srcdoc">srcdoc</code> document</span>, the
   document must not have a <span>character encoding