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Short URL: http://html5.org/r/1956

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SVNBugCommentTime (UTC)
1956Cleanup around <img> requirements. Disallow scripts to run in <img> images.2008-07-30 02:24
Index: source
===================================================================
--- source	(revision 1955)
+++ source	(revision 1956)
@@ -12982,17 +12982,18 @@
   title="attr-img-alt"><code>alt</code></dfn> attribute is the
   <code>img</code> element's <span>fallback content</span>.</p>
 
-  <p><strong>Authoring requirements</strong>: The <code
-  title="attr-img-src">src</code> attribute must be present, and must
-  contain a <span>valid URL</span>. The requirements on the <code
-  title="attr-img-alt">alt</code> attribute's value are described <a
-  href="#alt">in the next section</a>.</p>
+  <p>The <code title="attr-img-src">src</code> attribute must be
+  present, and must contain a <span>valid URL</span>.</p>
 
   <p class="big-issue">Should we restrict the URL to pointing to an
   image? What's an image? Is PDF an image? (Safari supports PDFs in
   &lt;img> elements.) How about SVG? (Opera supports those). WMFs?
   XPMs? HTML?</p>
 
+  <p>The requirements on the <code title="attr-img-alt">alt</code>
+  attribute's value are described <a href="#alt">in the next
+  section</a>.</p>
+
   <p class="big-issue">There has been some suggestion that the <code
   title="">longdesc</code> attribute from HTML4, or some other
   mechanism that is more powerful than <code title="">alt=""</code>,
@@ -13005,11 +13006,10 @@
 
   <hr>
 
-  <p><strong>User agent requirements</strong>: When the <code
-  title="attr-img-alt">alt</code> attribute is present and its value
-  is the empty string, the image supplements the surrounding
-  content. In such cases, the image may be omitted without affecting
-  the meaning of the document.</p>
+  <p>When the <code title="attr-img-alt">alt</code> attribute is
+  present and its value is the empty string, the image supplements the
+  surrounding content. In such cases, the image may be omitted in the
+  rendering without affecting the meaning of the document.</p>
 
   <p>When the <code title="attr-img-alt">alt</code> attribute is
   present and its value is not the empty string, the image is a
@@ -13035,6 +13035,13 @@
   element's <code title="attr-img-alt">alt</code> attribute, if any,
   or nothing, if that attribute is empty or absent.</p>
 
+  <p>When the <code title="attr-img-src">src</code> attribute is
+  present, the element represents the image given by that
+  attribute.</p>
+
+  <p>The contents of <code>img</code> elements, if any, are ignored
+  for the purposes of rendering.</p>
+
   <hr>
 
   <p>When an <code>img</code> is created with a <code
@@ -13075,7 +13082,8 @@
   responses.</p>
 
   <p>User agents must not support non-image resources with the
-  <code>img</code> element.</p>
+  <code>img</code> element. User agents must not run executable code
+  (e.g. scripts) embedded in the image resource.</p>
 
   <hr>
 
@@ -13099,9 +13107,6 @@
   <p>The <code>img</code> element supports <span>dimension
   attributes</span>.</p>
 
-  <!-- XXX contents of <img> should be ignored for rendering but not
-  for semantics, e.g. <script>, <input>, etc. -->
-
   <p>The DOM attributes <dfn
   title="dom-img-alt"><code>alt</code></dfn>, <dfn
   title="dom-img-src"><code>src</code></dfn>, <dfn

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