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Short URL: http://html5.org/r/2566

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SVNBugCommentTime (UTC)
2566[Authors] [Conformance Checkers] [Gecko] [Internet Explorer] [Opera] [Webkit] Make <img src=''> a special case. (credit: bz)2008-12-24 11:04
Index: source
===================================================================
--- source	(revision 2565)
+++ source	(revision 2566)
@@ -15597,7 +15597,10 @@
   <p>The <code title="attr-img-src">src</code> attribute must be
   present, and must contain a <span>valid URL</span> referencing a
   non-interactive, optionally animated, image resource that is neither
-  paged nor scripted.</p>
+  paged nor scripted. If the <i>base URI of the element</i> is the
+  same as <span>the document's address</span>, then the <code
+  title="attr-img-src">src</code> attribute's value must not be the
+  empty string.</p>
 
   <p class="note">Images can thus be static bitmaps (e.g. PNGs, GIFs,
   JPEGs), single-page vector documents (single-page PDFs, XML files
@@ -15630,9 +15633,16 @@
   user agent must <span>fetch</span> the resource specifed by the
   <code title="attr-img-src">src</code> attribute's value, unless the
   user agent cannot support images, or its support for images has been
-  disabled, or the user agent only fetches elements on demand.</p>
-  <!-- Note how this does NOT happen when the base URL changes. -->
+  disabled, or the user agent only fetches elements on demand, or the
+  element's <code title="attr-img-src">src</code> attribute has a
+  value that is an <i>ignored self-reference</i>.</p> <!-- Note how
+  this does NOT happen when the base URL changes. -->
 
+  <p>The <code title="attr-img-src">src</code> attribute's value is an
+  <i>ignored self-reference</i> if its value is the empty string, and
+  the <i>base URI of the element</i> is the same as <span>the
+  document's address</span>.</p>
+
   <p>Fetching the image must <span>delay the <code
   title="event-load">load</code> event</span>.</p>
 
@@ -15654,6 +15664,12 @@
   the image is being <span title="fetch">fetched</span> must update
   the presentation of the image appropriately.</p>
 
+  <p>If the image was not fetched (e.g. because the UA's image support
+  is disabled, or because the <code title="attr-img-src">src</code>
+  attribute's value is an <i>ignored self-reference</i>), or if the
+  conditions in the previous paragraph are not met, then the image is
+  <em>not</em> <i>available</i>.</p>
+
   <p>Whether the image is fetched successfully or not (e.g. whether
   the response code was a 2xx code <span
   title="concept-http-equivalent-codes">or equivalent</span>) must be
@@ -15715,9 +15731,9 @@
     the content, redundant with some other information in the
     document.</p>
 
-    <p>If the image is <i>available</i> and the user agent is configured to
-    display that image, then the element represents the image
-    specified by the <code title="attr-img-src">src</code>
+    <p>If the image is <i>available</i> and the user agent is
+    configured to display that image, then the element represents the
+    image specified by the <code title="attr-img-src">src</code>
     attribute.</p>
 
     <p>Otherwise, the element represents nothing, and may be omitted

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