html5/spec Overview.html,1.1414,1.1415

Update of /sources/public/html5/spec
In directory hutz:/tmp/cvs-serv26007

Modified Files:
	Overview.html 
Log Message:
Change the 'floating point number' syntax to allow an exponent. (whatwg r2242)

Index: Overview.html
===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.1414
retrieving revision 1.1415
diff -u -d -r1.1414 -r1.1415
--- Overview.html	25 Sep 2008 11:03:02 -0000	1.1414
+++ Overview.html	26 Sep 2008 08:59:44 -0000	1.1415
@@ -27,7 +27,7 @@
     for HTML and XHTML</h2>
 
    <h2 class="no-num no-toc" id=editors0><!-- "W3C Working Draft" -->
-    Editor's Draft <!--ZZZ-->25 September 2008</h2>
+    Editor's Draft <!--ZZZ-->26 September 2008</h2>
 
    <dl><!-- ZZZ: update the month/day
     <dt>This Version:</dt>
@@ -199,7 +199,7 @@
 
   <p>The W3C <a href="http://www.w3.org/html/wg/">HTML Working Group</a> is
    the W3C working group responsible for this specification's progress along
-   the W3C Recommendation track. <!--ZZZ:--> This specification is the 25
+   the W3C Recommendation track. <!--ZZZ:--> This specification is the 26
    September 2008 <!--ZZZ "Working Draft"-->Editor's Draft. <!--:ZZZ--></p>
   <!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST -->
   <!-- relationship to other work (required) -->
@@ -3472,11 +3472,33 @@
   <h5 id=real-numbers><span class=secno>2.4.3.3. </span>Real numbers</h5>
 
   <p>A string is a <dfn id=valid1>valid floating point number</dfn> if it
-   consists of one of more characters in the range U+0030 DIGIT ZERO (0) to
-   U+0039 DIGIT NINE (9), optionally with a single U+002E FULL STOP (".")
-   character somewhere (either before these numbers, in between two numbers,
-   or after the numbers), all optionally prefixed with a U+002D HYPHEN-MINUS
-   ("-") character.
+   consists of:
+
+  <ol class=brief>
+   <li>Optionally, a U+002D HYPHEN-MINUS ("-") character.
+
+   <li>A series of one or more characters in the range U+0030 DIGIT ZERO (0)
+    to U+0039 DIGIT NINE (9).
+
+   <li>Optionally:
+    <ol>
+     <li>A single U+002E FULL STOP (".") character.
+
+     <li>A series of one or more characters in the range U+0030 DIGIT ZERO
+      (0) to U+0039 DIGIT NINE (9).
+    </ol>
+
+   <li>Optionally:
+    <ol>
+     <li>Either a U+0065 LATIN SMALL LETTER E character or a U+0045 LATIN
+      CAPITAL LETTER E character.
+
+     <li>Optionally, a U+002D HYPHEN-MINUS ("-") character.
+
+     <li>A series of characters in the range U+0030 DIGIT ZERO (0) to U+0039
+      DIGIT NINE (9).
+    </ol>
+  </ol>
 
   <p>The <dfn id=rules1>rules for parsing floating point number values</dfn>
    are as given in the following algorithm. As with the previous algorithms,
@@ -3494,10 +3516,13 @@
      title="">input</var>, initially pointing at the start of the string.
 
    <li>
-    <p>Let <var title="">value</var> have the value 0.
+    <p>Let <var title="">value</var> have the value 1.
 
    <li>
-    <p>Let <var title="">sign</var> have the value "positive".
+    <p>Let <var title="">divisor</var> have the value 1.
+
+   <li>
+    <p>Let <var title="">exponent</var> have the value 1.
 
    <li>
     <p><a href="#skip-whitespace">Skip whitespace</a>.
@@ -3507,11 +3532,12 @@
      title="">input</var>, return an error.
 
    <li>
-    <p>If the character indicated by <var title="">position</var> (the first
-     character) is a U+002D HYPHEN-MINUS ("-") character:</p>
+    <p>If the character indicated by <var title="">position</var> is a U+002D
+     HYPHEN-MINUS ("-") character:</p>
 
     <ol>
-     <li>Let <var title="">sign</var> be "negative".
+     <li>Change <var title="">value</var> and <var title="">divisor</var> to
+      &#x2212;1.
 
      <li>Advance <var title="">position</var> to the next character.
 
@@ -3520,75 +3546,106 @@
     </ol>
 
    <li>
-    <p>If the next character is not one of U+0030 DIGIT ZERO (0) .. U+0039
-     DIGIT NINE (9) or U+002E FULL STOP ("."), then return an error.
-
-   <li>
-    <p>If the next character is U+002E FULL STOP ("."), but either that is
-     the last character or the character after that one is not one of U+0030
-     DIGIT ZERO (0) .. U+0039 DIGIT NINE (9), then return an error.
+    <p>If the character indicated by <var title="">position</var> is not one
+     of U+0030 DIGIT ZERO (0) .. U+0039 DIGIT NINE (9), then return an error.
    </li>
    <!-- Ok. At this point we know we have a number. It might have
    trailing garbage which we'll ignore, but it's a number, and we
    won't return an error. -->
 
    <li>
-    <p>If the next character is one of U+0030 DIGIT ZERO (0) .. U+0039 DIGIT
-     NINE (9):</p>
+    <p><a href="#collect">Collect a sequence of characters</a> in the range
+     U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9), and interpret the
+     resulting sequence as a base-ten integer. Multiply <var
+     title="">value</var> by that integer.
+
+   <li>If <var title="">position</var> is past the end of <var
+    title="">input</var>, return <var title="">value</var> and abort these
+    steps.
+
+   <li>
+    <p>If the character indicated by <var title="">position</var> is a U+002E
+     FULL STOP ("."), run these substeps:</p>
 
     <ol>
-     <li>Multiply <var title="">value</var> by ten.
+     <li>
+      <p>Advance <var title="">position</var> to the next character.
 
-     <li>Add the value of the current character (0..9) to <var
-      title="">value</var>.
+     <li>
+      <p>If <var title="">position</var> is past the end of <var
+       title="">input</var>, or if the character indicated by <var
+       title="">position</var> is not one of U+0030 DIGIT ZERO (0) .. U+0039
+       DIGIT NINE (9), then return <var title="">value</var> and abort these
+       steps.
 
-     <li>Advance <var title="">position</var> to the next character.
+     <li>
+      <p><i>Fraction loop</i>: Multiply <var title="">divisor</var> by ten.
 
-     <li>If <var title="">position</var> is past the end of <var
-      title="">input</var>, then if <var title="">sign</var> is "positive",
-      return <var title="">value</var>, otherwise return 0-<var
+     <li>Add the value of the current character interpreted as a base-ten
+      digit (0..9) divided by <var title="">divisor</var>, to <var
       title="">value</var>.
 
-     <li>Otherwise return to the top of step 10 in the overall algorithm
-      (that's the step within which these substeps find themselves).
+     <li>
+      <p>Advance <var title="">position</var> to the next character.
+
+     <li>
+      <p>If <var title="">position</var> is past the end of <var
+       title="">input</var>, then return <var title="">value</var> and abort
+       these steps.
+
+     <li>
+      <p>If the character indicated by <var title="">position</var> is one of
+       U+0030 DIGIT ZERO (0) .. U+0039 DIGIT NINE (9), return to the step
+       labeled <i>fraction loop</i> in these substeps.
     </ol>
 
    <li>
-    <p>Otherwise, if the next character is not a U+002E FULL STOP ("."), then
-     if <var title="">sign</var> is "positive", return <var
-     title="">value</var>, otherwise return 0-<var title="">value</var>.
+    <p>If the character indicated by <var title="">position</var> is a U+0065
+     LATIN SMALL LETTER E character or a U+0045 LATIN CAPITAL LETTER E
+     character, run these substeps:</p>
 
-   <li>
-    <p>The next character is a U+002E FULL STOP ("."). Advance <var
-     title="">position</var> to the character after that.
+    <ol>
+     <li>
+      <p>Advance <var title="">position</var> to the next character.
 
-   <li>
-    <p>Let <var title="">divisor</var> be 1.
+     <li>
+      <p>If <var title="">position</var> is past the end of <var
+       title="">input</var>, then return <var title="">value</var> and abort
+       these steps.
 
-   <li>
-    <p>If the next character is one of U+0030 DIGIT ZERO (0) .. U+0039 DIGIT
-     NINE (9):</p>
+     <li>
+      <p>If the character indicated by <var title="">position</var> is a
+       U+002D HYPHEN-MINUS ("-") character:</p>
 
-    <ol>
-     <li>Multiply <var title="">divisor</var> by ten.
+      <ol>
+       <li>Change <var title="">exponent</var> to &#x2212;1.
 
-     <li>Add the value of the current character (0..9) divided by <var
-      title="">divisor</var>, to <var title="">value</var>.
+       <li>Advance <var title="">position</var> to the next character.
 
-     <li>Advance <var title="">position</var> to the next character.
+       <li>
+        <p>If <var title="">position</var> is past the end of <var
+         title="">input</var>, then return <var title="">value</var> and
+         abort these steps.
+      </ol>
 
-     <li>If <var title="">position</var> is past the end of <var
-      title="">input</var>, then if <var title="">sign</var> is "positive",
-      return <var title="">value</var>, otherwise return 0-<var
-      title="">value</var>.
+     <li>
+      <p>If the character indicated by <var title="">position</var> is not
+       one of U+0030 DIGIT ZERO (0) .. U+0039 DIGIT NINE (9), then return
+       <var title="">value</var> and abort these steps.
 
-     <li>Otherwise return to the top of step 14 in the overall algorithm
-      (that's the step within which these substeps find themselves).
+     <li>
+      <p><a href="#collect">Collect a sequence of characters</a> in the range
+       U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9), and interpret the
+       resulting sequence as a base-ten integer. Multiply <var
+       title="">exponent</var> by that integer.
+
+     <li>
+      <p>Multiply <var title="">value</var> by ten raised to the <var
+       title="">exponent</var>th power.
     </ol>
 
    <li>
-    <p>Otherwise, if <var title="">sign</var> is "positive", return <var
-     title="">value</var>, otherwise return 0-<var title="">value</var>.
+    <p>Return <var title="">value</var>.
   </ol>
 
   <h5 id=ratios><span class=secno>2.4.3.4. </span>Ratios</h5>
@@ -29851,10 +29908,10 @@
    the URL represented by its <a href="#value12"
    title=concept-fe-value>value</a>. User agents may allow the user to set
    the <a href="#value12" title=concept-fe-value>value</a> to a string that
-   is not a <span>value URL</span>. User agents should allow the user to set
-   the <a href="#value12" title=concept-fe-value>value</a> to the empty
-   string. User agents must not allow users to insert U+000A LINE FEED (LF)
-   or U+000D CARRIAGE RETURN (CR) characters into the <a href="#value12"
+   is not a <a href="#valid9">valid URL</a>. User agents should allow the
+   user to set the <a href="#value12" title=concept-fe-value>value</a> to the
+   empty string. User agents must not allow users to insert U+000A LINE FEED
+   (LF) or U+000D CARRIAGE RETURN (CR) characters into the <a href="#value12"
    title=concept-fe-value>value</a>.
 
   <p><strong>The <a href="#value8">value sanitization algorithm</a> is as
@@ -30029,8 +30086,8 @@
   <p><strong>Constraint validation:</strong> When there is both a <a
    href="#selected" title=concept-input-value-datetime>selected UTC date and
    time</a> and a <a href="#minimum" title=concept-input-min-datetime>minimum
-   UTC date and time</a>, if the former is less than the latter, the element
-   is <a href="#suffering1">suffering from an underflow</a>.
+   UTC date and time</a>, if the former is earlier than the latter, the
+   element is <a href="#suffering1">suffering from an underflow</a>.
 
   <p>The <code title=attr-input-max><a href="#max4">max</a></code> attribute,
    if specified, must have a value that is a <a href="#valid6">valid UTC date
@@ -30044,11 +30101,18 @@
   <p><strong>Constraint validation:</strong> When there is both a <a
    href="#selected" title=concept-input-value-datetime>selected UTC date and
    time</a> and a <a href="#maximum" title=concept-input-max-datetime>maximum
-   UTC date and time</a>, if the former is more than the latter, the element
+   UTC date and time</a>, if the former is later than the latter, the element
    is <a href="#suffering2">suffering from an overflow</a>.
 
-  <p class=big-issue>... <code title=attr-input-step><a
-   href="#step0">step</a></code>
+  <p class=big-issue>The <code title=attr-input-step><a
+   href="#step0">step</a></code> attribute, if specified, must have a value
+   that is a ...</p>
+  <!-- values: positive non-zero floating point, or "any" -->
+  <!-- units: seconds -->
+  <!-- default: 60 -->
+  <!-- zero point: min, or 1970-01-01T00:00:00.0Z -->
+  <!-- allow rounding -->
+  <!-- <span>suffering from a step mismatch</span> -->
 
   <p>The following common <code><a href="#input0">input</a></code> element
    content attributes, DOM attributes, and methods apply to the element:

Received on Friday, 26 September 2008 09:00:21 UTC