added clarifying text RE: use of modern techniques in conjunction with longdesc where appropriate
--- a/longdesc1/longdesc.html Sat Dec 14 18:09:50 2013 -0500
+++ b/longdesc1/longdesc.html Sat Dec 14 18:41:55 2013 -0500
@@ -659,6 +659,15 @@
<p>Best practices for full descriptions of images are beyond the scope
of this document, but there are many resources available.</p>
</div>
+ <p>Authors <em class="rfc2119">should</em> not rely solely on longdesc where standards
+ exist to provide direct, structured access.</p>
+ <div class="note">
+ <p><em>This section is informative</em></p>
+ <p>For example a MathML version of mathematical content, or an SVG image that
+ uses the accessibility features of SVG, can provide better accessibility to
+ users with appropriate technology. In such cases, it is appropriate to use
+ longdesc as a fallback strategy, in combination with more modern techniques.</p>
+ </div>
<h4 id="user-agents">3.0.3 User Agents</h4>
<p>If the <code>longdesc</code> value is valid, User agents <em class="rfc2119">must</em>
make the link available to all users through the regular user