--- a/rdf-mt/index.html	Sun Jun 09 19:43:25 2013 -0500
+++ b/rdf-mt/index.html	Sun Jun 09 21:24:29 2013 -0700
@@ -505,7 +505,7 @@
 <div  class="tabletitle">Semantic conditions for datatyped literals.</div>
 <table border="1">
     <tbody>
-<tr><td class="semantictable">If <code>rdf:langString</code> is in D, then for every language-tagged string E with lexical form sss and language tag ttt, IL(E)= &lt; sss, ttt &gt; </td></tr>
+<tr><td class="semantictable">If <code>rdf:langString</code> is in D, then for every language-tagged string E with lexical form sss and language tag ttt, IL(E)= &lt; sss, ttt' &gt;, where ttt' is ttt converted to lower case using US-ASCII rules </td></tr>
 <tr><td class="semantictable">For every other IRI aaa in D, and every literal "sss"^^aaa, IL("sss"^^aaa) = L2V(I(aaa))(sss)</td></tr>
 </tbody></table>