--- a/rdf-concepts/index.html	Thu Nov 10 16:59:53 2011 +0000
+++ b/rdf-concepts/index.html	Thu Nov 10 19:29:39 2011 +0000
@@ -543,7 +543,8 @@
     strings</a> have the <a>datatype IRI</a>
     <code>http://www.w3.org/1999/02/22-rdf-syntax-ns#langString</code>.
     No datatype is formally defined for this IRI because the definition
-    of datatypes does not accommodate <a title="language tag">language tags</a>.
+    of <a title="datatype">datatypes</a> does not accommodate
+    <a title="language tag">language tags</a> in the <a>lexical space</a>.
     The <a>value space</a> associated with the datatype IRI is the set
     of all pairs of strings and language tags.</p>