Index: /trunk/ippToPsps/config/tables.IN.vot
===================================================================
--- /trunk/ippToPsps/config/tables.IN.vot	(revision 39045)
+++ /trunk/ippToPsps/config/tables.IN.vot	(revision 39046)
@@ -519,7 +519,30 @@
           <TR><TD>0</TD><TD>NIGHTLY_STACK</TD><TD>Nightly stack</TD></TR>
           <TR><TD>1</TD><TD>DEEP_STACK</TD><TD>Deep stack</TD></TR>
-        </TABLEDATA>
-      </DATA>
-    </TABLE>
+          <TR><TD>2</TD><TD>REF_STACK</TD><TD>Reference (seasonal) stack</TD></TR>
+          <TR><TD>3</TD><TD>IQ_STACK</TD><TD>IQ stack</TD></TR>
+        </TABLEDATA>
+      </DATA>
+    </TABLE>
+
+    <TABLE name="DiffType">
+      <DESCRIPTION>Contains descriptions of the types of difference images constructed.</DESCRIPTION>
+      <PARAM arraysize="1" datatype="char" ucd="meta.bib.author" name="Author" value="PSPS"></PARAM>
+      <FIELD name="diffTypeID" arraysize="1" datatype="unsignedByte">
+        <DESCRIPTION>Diff type identifier.</DESCRIPTION>
+      </FIELD>
+      <FIELD name="name" arraysize="100" datatype="char">
+        <DESCRIPTION>Diff type name.</DESCRIPTION>
+      </FIELD>
+      <FIELD name="description" arraysize="100" datatype="char">
+        <DESCRIPTION>Diff type description.</DESCRIPTION>
+      </FIELD>
+      <DATA>
+        <TABLEDATA>
+          <TR><TD>0</TD><TD>WARP_STACK</TD><TD>warp-stack difference image</TD></TR>
+          <TR><TD>1</TD><TD>STACK_STACK</TD><TD>stack-stack difference image</TD></TR>
+        </TABLEDATA>
+      </DATA>
+    </TABLE>
+
     <TABLE name="TessellationType">
       <DESCRIPTION>Contains descriptions of the types of image tessellations for the sky.</DESCRIPTION>