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hixie: Discourage also auto-generating alt text from other sources that the browsers also have access to. (whatwg r4558)

From: poot <cvsmail@w3.org>
Date: Sun, 10 Jan 2010 22:55:46 +0900 (JST)
To: public-html-diffs@w3.org
Message-Id: <20100110135546.EA1C92BC09@toro.w3.mag.keio.ac.jp>
hixie: Discourage also auto-generating alt text from other sources that
the browsers also have access to. (whatwg r4558)

http://dev.w3.org/cvsweb/html5/spec/Overview.html?r1=1.3637&r2=1.3638&f=h
http://html5.org/tools/web-apps-tracker?from=4557&to=4558

===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.3637
retrieving revision 1.3638
diff -u -d -r1.3637 -r1.3638
--- Overview.html	10 Jan 2010 11:46:27 -0000	1.3637
+++ Overview.html	10 Jan 2010 13:55:34 -0000	1.3638
@@ -16618,7 +16618,16 @@
   content.</p>
 
   <p>Markup generators should generally avoid using the image's own
-  file name as the alternative text.</p>
+  file name as the alternative text. Similarly, markup generators
+  should avoid generating alternative text from any content that will
+  be equally available to presentation user agents (e.g. Web
+  browsers).</p>
+
+  <p class="note">This is because once a page is generated, it will
+  typically not be updated, whereas the browsers that later read the
+  page can be updated by the user, therefore the browser is likely to
+  have more up-to-date and finely-tuned heuristics than the markup
+  generator did when generating the page.</p>
 
   </div><div class="impl">
Received on Sunday, 10 January 2010 13:56:15 GMT

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