Add some details


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16035 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/Lexicon.html b/docs/Lexicon.html
index 355306b..e735a99 100644
--- a/docs/Lexicon.html
+++ b/docs/Lexicon.html
@@ -79,7 +79,9 @@
 <div class="doc_text">
   <dl>
     <dt><a name="BURS"><b>BURS</b></a></dt>
-    <dd>Bottom Up Rewriting System</dd>
+    <dd>Bottom Up Rewriting System - A method of instruction selection for
+        code generation.  An example is the <a 
+href="http://www.program-transformation.org/Transform/BURG">BURG</a> tool.</dd>
   </dl>
 </div>
 <!-- _______________________________________________________________________ -->