hixie: Better define how sets of unique space-separated tokens are handled in terms of case-sensitivity. (whatwg r5571) from poot on 2010-09-30 (public-html-diffs@w3.org from September 2010)

From: poot <cvsmail@w3.org>
Date: Fri, 1 Oct 2010 08:08:13 +0900 (JST)
To: public-html-diffs@w3.org
Message-Id: <20100930230813.BB7CD2BBE7@toro.w3.mag.keio.ac.jp>
hixie: Better define how sets of unique space-separated tokens are
handled in terms of case-sensitivity. (whatwg r5571)

http://dev.w3.org/cvsweb/html5/spec/Overview.html?r1=1.4452&r2=1.4453&f=h
http://html5.org/tools/web-apps-tracker?from=5570&to=5571

===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.4452
retrieving revision 1.4453
diff -u -d -r1.4452 -r1.4453
--- Overview.html 30 Sep 2010 08:47:45 -0000 1.4452
+++ Overview.html 30 Sep 2010 23:07:51 -0000 1.4453
@@ -4818,20 +4818,21 @@
    <li><p>Return <var title="">result</var>.</p>
 
   </ol></div><hr><h4 id="space-separated-tokens"><span class="secno">2.5.7 </span>Space-separated tokens</h4><p>A <dfn id="set-of-space-separated-tokens">set of space-separated tokens</dfn> is a string containing
-  zero or more words separated by one or more <a href="#space-character" title="space
-  character">space characters</a>, where words consist of any
-  string of one or more characters, none of which are <a href="#space-character" title="space character">space characters</a>.<p>A string containing a <a href="#set-of-space-separated-tokens">set of space-separated tokens</a>
+  zero or more words (known as tokens) separated by one or more <a href="#space-character" title="space character">space characters</a>, where words consist
+  of any string of one or more characters, none of which are <a href="#space-character" title="space character">space characters</a>.<p>A string containing a <a href="#set-of-space-separated-tokens">set of space-separated tokens</a>
   may have leading or trailing <a href="#space-character" title="space character">space
   characters</a>.<p>An <dfn id="unordered-set-of-unique-space-separated-tokens">unordered set of unique space-separated tokens</dfn> is a
-  <a href="#set-of-space-separated-tokens">set of space-separated tokens</a> where none of the words
+  <a href="#set-of-space-separated-tokens">set of space-separated tokens</a> where none of the tokens
   are duplicated.<p>An <dfn id="ordered-set-of-unique-space-separated-tokens">ordered set of unique space-separated tokens</dfn> is a
-  <a href="#set-of-space-separated-tokens">set of space-separated tokens</a> where none of the words
+  <a href="#set-of-space-separated-tokens">set of space-separated tokens</a> where none of the tokens
   are duplicated but where the order of the tokens is meaningful.<p><a href="#set-of-space-separated-tokens" title="set of space-separated tokens">Sets of
   space-separated tokens</a> sometimes have a defined set of
   allowed values. When a set of allowed values is defined, the tokens
   must all be from that list of allowed values; other values are
   non-conforming. If no such set of allowed values is provided, then
-  all values are conforming.<div class="impl">
+  all values are conforming.<p class="note">How tokens in a <a href="#set-of-space-separated-tokens">set of space-separated
+  tokens</a> are to be compared (e.g. case-sensitively or not) is
+  defined on a per-set basis.<div class="impl">
 
   <p>When a user agent has to <dfn id="split-a-string-on-spaces">split a string on spaces</dfn>, it
   must use the following algorithm:</p>
@@ -4898,7 +4899,8 @@
    characters</a> that are not <a href="#space-character" title="space character">space
    characters</a>, and let that be <var title="">s</var>.</li>
 
-   <li><p>If <var title="">s</var> is exactly equal to <var title="">token</var>, then:</p>
+   <li><p>If <var title="">s</var> is exactly equal to <var title="">token</var> (this is a <a href="#case-sensitive">case-sensitive</a>
+   comparison), then:</p>
 
     <ol><li><p><a href="#skip-whitespace">Skip whitespace</a> (in <var title="">input</var>).</li>
 
@@ -5698,7 +5700,7 @@
   </div>
 
 
-  <h4 id="content-type-sniffing"><span class="secno">2.7.3 </span>Determining the type of a resource</h4>
+  <h4 id="content-type-sniffing"><span class="secno">2.7.3 </span>Determining the type of a resource</h4><p class="XXX annotation"><span><a href="http://www.w3.org/html/wg/tracker/issues/125">ISSUE-125</a> (charset-vs-quotes) and <a href="http://www.w3.org/html/wg/tracker/issues/126">ISSUE-126</a> (charset-vs-backslashes) block progress to Last Call</span></p>
 
   <p>The <dfn id="content-type" title="Content-Type">Content-Type metadata</dfn> of a
   resource must be obtained and interpreted in a manner consistent
@@ -19056,8 +19058,8 @@
   </div><hr><p>The <dfn id="attr-iframe-sandbox" title="attr-iframe-sandbox"><code>sandbox</code></dfn>
   attribute, when specified, enables a set of extra restrictions on
   any content hosted by the <code><a href="#the-iframe-element">iframe</a></code>. Its value must be an
-  <a href="#unordered-set-of-unique-space-separated-tokens">unordered set of unique space-separated tokens</a>. The
-  allowed values are <code title="attr-iframe-sandbox-allow-same-origin"><a href="#attr-iframe-sandbox-allow-same-origin">allow-same-origin</a></code>,
+  <a href="#unordered-set-of-unique-space-separated-tokens">unordered set of unique space-separated tokens</a> that are
+  <a href="#ascii-case-insensitive">ASCII case-insensitive</a>. The allowed values are <code title="attr-iframe-sandbox-allow-same-origin"><a href="#attr-iframe-sandbox-allow-same-origin">allow-same-origin</a></code>,
   <code title="attr-iframe-sandbox-allow-top-navigation"><a href="#attr-iframe-sandbox-allow-top-navigation">allow-top-navigation</a></code>,
   <code title="attr-iframe-sandbox-allow-forms"><a href="#attr-iframe-sandbox-allow-forms">allow-forms</a></code>,
   and <code title="attr-iframe-sandbox-allow-scripts"><a href="#attr-iframe-sandbox-allow-scripts">allow-scripts</a></code>. When
@@ -25590,10 +25592,11 @@
   model --><hr><p>The <code><a href="#the-td-element">td</a></code> and <code><a href="#the-th-element">th</a></code> element may have a <dfn id="attr-tdth-headers" title="attr-tdth-headers"><code>headers</code></dfn> content
   attribute specified. The <code title="attr-tdth-headers"><a href="#attr-tdth-headers">headers</a></code> attribute, if specified,
   must contain a string consisting of an <a href="#unordered-set-of-unique-space-separated-tokens">unordered set of unique
-  space-separated tokens</a>, each of which must have the value of
-  an <a href="#concept-id" title="concept-id">ID</a> of a <code><a href="#the-th-element">th</a></code> element taking part in the same <a href="#concept-table" title="concept-table">table</a> as the <code><a href="#the-td-element">td</a></code> or
-  <code><a href="#the-th-element">th</a></code> element<span class="impl"> (as defined by the
-  <a href="#table-model">table model</a>)</span>.<p>A <code><a href="#the-th-element">th</a></code> element with <a href="#concept-id" title="concept-id">ID</a> <var title="">id</var> is said
+  space-separated tokens</a> that are <a href="#case-sensitive">case-sensitive</a>,
+  each of which must have the value of an <a href="#concept-id" title="concept-id">ID</a> of a <code><a href="#the-th-element">th</a></code> element taking
+  part in the same <a href="#concept-table" title="concept-table">table</a> as the
+  <code><a href="#the-td-element">td</a></code> or <code><a href="#the-th-element">th</a></code> element<span class="impl"> (as
+  defined by the <a href="#table-model">table model</a>)</span>.<p>A <code><a href="#the-th-element">th</a></code> element with <a href="#concept-id" title="concept-id">ID</a> <var title="">id</var> is said
   to be <i>directly targeted</i> by all <code><a href="#the-td-element">td</a></code> and
   <code><a href="#the-th-element">th</a></code> elements in the same <a href="#concept-table" title="concept-table">table</a> that have <code title="attr-tdth-headers"><a href="#attr-tdth-headers">headers</a></code> attributes whose values
   include as one of their tokens the <a href="#concept-id" title="concept-id">ID</a> <var title="">id</var>. A
@@ -27189,10 +27192,11 @@
   can be submitted to a server for processing.<p>The <dfn id="attr-form-accept-charset" title="attr-form-accept-charset"><code>accept-charset</code></dfn>
   attribute gives the character encodings that are to be used for the
   submission. If specified, the value must be an <a href="#ordered-set-of-unique-space-separated-tokens">ordered set of
-  unique space-separated tokens</a>, and each token must be an
-  <a href="#ascii-case-insensitive">ASCII case-insensitive</a> match for the <a href="#preferred-mime-name">preferred
-  MIME name</a> of an <a href="#ascii-compatible-character-encoding">ASCII-compatible character
-  encoding</a>. <a href="#refsIANACHARSET">[IANACHARSET]</a><p>The <dfn id="attr-form-name" title="attr-form-name"><code>name</code></dfn> attribute
+  unique space-separated tokens</a> that are <a href="#ascii-case-insensitive">ASCII
+  case-insensitive</a>, and each token must be an <a href="#ascii-case-insensitive">ASCII
+  case-insensitive</a> match for the <a href="#preferred-mime-name">preferred MIME
+  name</a> of an <a href="#ascii-compatible-character-encoding">ASCII-compatible character encoding</a>.
+  <a href="#refsIANACHARSET">[IANACHARSET]</a><p>The <dfn id="attr-form-name" title="attr-form-name"><code>name</code></dfn> attribute
   represents the <code><a href="#the-form-element">form</a></code>'s name within the <code title="dom-document-forms"><a href="#dom-document-forms">forms</a></code> collection. The value must
   not be the empty string, and the value must be unique amongst the
   <code><a href="#the-form-element">form</a></code> elements in the <code title="dom-document-forms"><a href="#dom-document-forms">forms</a></code> collection that it is in, if
@@ -33872,8 +33876,9 @@
   that went into the calculation or that otherwise influenced the
   calculation. The <code title="attr-output-for"><a href="#attr-output-for">for</a></code> attribute,
   if specified, must contain a string consisting of an <a href="#unordered-set-of-unique-space-separated-tokens">unordered
-  set of unique space-separated tokens</a>, each of which must have
-  the value of an <a href="#concept-id" title="concept-id">ID</a> of an element in the same
+  set of unique space-separated tokens</a> that are
+  <a href="#case-sensitive">case-sensitive</a>, each of which must have the value of an
+  <a href="#concept-id" title="concept-id">ID</a> of an element in the same
   <code><a href="#document">Document</a></code>.<p>The <code title="attr-fae-form"><a href="#attr-fae-form">form</a></code> attribute is used to
   explicitly associate the <code><a href="#the-output-element">output</a></code> element with its
   <a href="#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="#attr-fe-name">name</a></code>
@@ -40206,12 +40211,14 @@
 
   </div><p>The <dfn id="attr-link-sizes" title="attr-link-sizes"><code>sizes</code></dfn>
   attribute gives the sizes of icons for visual media.<p>If specified, the attribute must have a value that is an
-  <a href="#unordered-set-of-unique-space-separated-tokens">unordered set of unique space-separated tokens</a>. The
-  values must all be either <code title="attr-link-sizes-any"><a href="#attr-link-sizes-any">any</a></code> or a value that consists of
-  two <a href="#valid-non-negative-integer" title="valid non-negative integer">valid non-negative
-  integers</a> that do not have a leading U+0030 DIGIT ZERO (0)
-  character and that are separated by a single U+0078 LATIN SMALL
-  LETTER X character (x).<p>The keywords represent icon sizes.<div class="impl">
+  <a href="#unordered-set-of-unique-space-separated-tokens">unordered set of unique space-separated tokens</a>, which
+  are <a href="#ascii-case-insensitive">ASCII case-insensitive</a>. The values must all be
+  either an <a href="#ascii-case-insensitive">ASCII case-insensitive</a> match for the string
+  "<code title="attr-link-sizes-any"><a href="#attr-link-sizes-any">any</a></code>", or a value that
+  consists of two <a href="#valid-non-negative-integer" title="valid non-negative integer">valid
+  non-negative integers</a> that do not have a leading U+0030 DIGIT
+  ZERO (0) character and that are separated by a single U+0078 LATIN
+  SMALL LETTER X or U+0058 LATIN CAPITAL LETTER X character.<p>The keywords represent icon sizes.<div class="impl">
 
   <p>To parse and process the attribute's value, the user agent must
   first <a href="#split-a-string-on-spaces" title="split a string on spaces">split the attribute's
@@ -40226,14 +40233,15 @@
   what they represent:</p>
 
   <ul><li><p>If the keyword doesn't contain exactly one U+0078 LATIN
-   SMALL LETTER X character (x), then this keyword doesn't represent
-   anything. Abort these steps for that keyword.</li>
+   SMALL LETTER X or U+0058 LATIN CAPITAL LETTER X character, then
+   this keyword doesn't represent anything. Abort these steps for that
+   keyword.</li>
 
    <li><p>Let <var title="">width string</var> be the string before
-   the "<code title="">x</code>".</li>
+   the "<code title="">x</code>" or "<code title="">X</code>".</li>
 
-   <li><p>Let <var title="">height string</var> be the string after the
-   "<code title="">x</code>".</li>
+   <li><p>Let <var title="">height string</var> be the string after
+   the "<code title="">x</code>" or "<code title="">X</code>".</li>
 
    <li><p>If either <var title="">width string</var> or <var title="">height string</var> start with a U+0030 DIGIT ZERO (0)
    character or contain any characters other than characters in the
@@ -40515,7 +40523,7 @@
   must also treat the keyword "<code title="">previous</code>" like
   the <code title="rel-prev"><a href="#link-type-prev">prev</a></code> keyword.</p>
 
-  </div><h5 id="other-link-types"><span class="secno">4.12.4.19 </span>Other link types</h5><p><span title="concept-rel-extensions">Extensions to the predefined
+  </div><h5 id="other-link-types"><span class="secno">4.12.4.19 </span>Other link types</h5><p class="XXX annotation"><span><a href="http://www.w3.org/html/wg/tracker/issues/127">ISSUE-127</a> (link-type-flags) blocks progress to Last Call</span><p><span title="concept-rel-extensions">Extensions to the predefined
   set of link types</span> may be registered in the <a href="http://wiki.whatwg.org/wiki/RelExtensions">WHATWG Wiki
   RelExtensions page</a>. <a href="#refsWHATWGWIKI">[WHATWGWIKI]</a><p>Anyone is free to edit the WHATWG Wiki RelExtensions page at any
   time to add a type. Extension types must be specified with the
@@ -49638,8 +49646,8 @@
   <code title="attr-accesskey"><a href="#the-accesskey-attribute">accesskey</a></code> attribute's value is
   used by the user agent as a guide for creating a keyboard shortcut
   that activates or focuses the element.<p>If specified, the value must be an <a href="#ordered-set-of-unique-space-separated-tokens">ordered set of unique
-  space-separated tokens</a>, each of which must be exactly one
-  Unicode code point in length.<div class="impl">
+  space-separated tokens</a> that are <a href="#case-sensitive">case-sensitive</a>,
+  each of which must be exactly one Unicode code point in length.<div class="impl">
 
   <p>An element's <dfn id="assigned-access-key">assigned access key</dfn> is a key combination
   derived from the element's <code title="attr-accesskey"><a href="#the-accesskey-attribute">accesskey</a></code> content attribute as
@@ -66993,11 +67001,11 @@
     <tr><th> <code title="">accept-charset</code>
      <td> <code title="attr-form-accept-charset"><a href="#attr-form-accept-charset">form</a></code>
      <td> Character encodings to use for <a href="#form-submission">form submission</a>
-     <td> <a href="#ordered-set-of-unique-space-separated-tokens">Ordered set of unique space-separated tokens</a> consisting of <a href="#preferred-mime-name" title="preferred MIME name">preferred MIME names</a> of <a href="#ascii-compatible-character-encoding" title="ASCII-compatible character encoding">ASCII-compatible character encodings</a>*
+     <td> <a href="#ordered-set-of-unique-space-separated-tokens">Ordered set of unique space-separated tokens</a>, <a href="#ascii-case-insensitive">ASCII case-insensitive</a>, consisting of <a href="#preferred-mime-name" title="preferred MIME name">preferred MIME names</a> of <a href="#ascii-compatible-character-encoding" title="ASCII-compatible character encoding">ASCII-compatible character encodings</a>*
     <tr><th> <code title="">accesskey</code>
      <td> <a href="#the-accesskey-attribute" title="attr-accesskey">HTML elements</a>
      <td> Keyboard shortcut to activate or focus element
-     <td> <a href="#ordered-set-of-unique-space-separated-tokens">Ordered set of unique space-separated tokens</a> consisting of one Unicode code point in length
+     <td> <a href="#ordered-set-of-unique-space-separated-tokens">Ordered set of unique space-separated tokens</a>, <a href="#case-sensitive">case-sensitive</a>, consisting of one Unicode code point in length
     <tr><th> <code title="">action</code>
      <td> <code title="attr-fs-action"><a href="#attr-fs-action">form</a></code>
      <td> <a href="#url">URL</a> to use for <a href="#form-submission">form submission</a>
@@ -67057,7 +67065,7 @@
     <tr><th> <code title="">class</code>
      <td> <a href="#classes" title="attr-class">HTML elements</a>
      <td> Classes to which the element belongs
-     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a>
+     <td> <a href="#set-of-space-separated-tokens">Set of space-separated tokens</a>
     <tr><th> <code title="">cols</code>
      <td> <code title="attr-textarea-cols"><a href="#attr-textarea-cols">textarea</a></code>
      <td> Maximum number of characters per line
@@ -67136,7 +67144,7 @@
     <tr><th> <code title="">for</code>
      <td> <code title="attr-output-for"><a href="#attr-output-for">output</a></code>
      <td> Specifies controls from which the output was calculated
-     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a> consisting of IDs*
+     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a>, <a href="#case-sensitive">case-sensitive</a>, consisting of IDs*
     <tr><th> <code title="">form</code>
      <td> <code title="attr-fae-form"><a href="#attr-fae-form">button</a></code>;
           <code title="attr-fae-form"><a href="#attr-fae-form">fieldset</a></code>;
@@ -67180,7 +67188,7 @@
      <td> <code title="attr-tdth-headers"><a href="#attr-tdth-headers">td</a></code>;
           <code title="attr-tdth-headers"><a href="#attr-tdth-headers">th</a></code>
      <td> The header cells for this cell
-     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a> consisting of IDs*
+     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a>, <a href="#case-sensitive">case-sensitive</a>, consisting of IDs*
     <tr><th> <code title="">height</code>
      <td> <code title="attr-canvas-height"><a href="#attr-canvas-height">canvas</a></code>;
           <code title="attr-dim-height"><a href="#attr-dim-height">embed</a></code>;
@@ -67409,7 +67417,7 @@
     <tr><th> <code title="">sandbox</code>
      <td> <code title="attr-iframe-sandbox"><a href="#attr-iframe-sandbox">iframe</a></code>
      <td> Security rules for nested content
-     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a> consisting of
+     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a>, <a href="#ascii-case-insensitive">ASCII case-insensitive</a>, consisting of
           "<code title="attr-iframe-sandbox-allow-same-origin"><a href="#attr-iframe-sandbox-allow-same-origin">allow-same-origin</a></code>",
           "<code title="attr-iframe-sandbox-allow-forms"><a href="#attr-iframe-sandbox-allow-forms">allow-forms</a></code>", and
           "<code title="attr-iframe-sandbox-allow-scripts"><a href="#attr-iframe-sandbox-allow-scripts">allow-scripts</a></code>"
@@ -67451,7 +67459,7 @@
     <tr><th> <code title="">sizes</code>
      <td> <code title="attr-link-sizes"><a href="#attr-link-sizes">link</a></code>
      <td> Sizes of the icons (for <code title="attr-link-rel"><a href="#attr-link-rel">rel</a></code>="<code title="rel-icon"><a href="#rel-icon">icon</a></code>")
-     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a> consisting of sizes*
+     <td> <a href="#unordered-set-of-unique-space-separated-tokens">Unordered set of unique space-separated tokens</a>, <a href="#ascii-case-insensitive">ASCII case-insensitive</a>, consisting of sizes*
     <tr><th> <code title="">span</code>
      <td> <code title="attr-col-span"><a href="#attr-col-span">col</a></code>;
           <code title="attr-colgroup-span"><a href="#attr-colgroup-span">colgroup</a></code>
Received on Thursday, 30 September 2010 23:08:43 UTC