diff -u -r1.65.2.1 -r1.65.2.2
--- lcio.xml	20 Oct 2009 23:18:22 -0000	1.65.2.1
+++ lcio.xml	5 Nov 2009 03:13:31 -0000	1.65.2.2
@@ -35,6 +35,9 @@

             For file record location of last index record in file
             For index record location of next index record (or null if last)
          </data>

+         <data type="long" name="firstRecordLocation">
+             For index record location of the first record associated with this block
+         </data>

      </block>
   </record>
   <record name="LCIOIndex">