Index: trunk/ippToPsps/config/tables.DF.vot
===================================================================
--- trunk/ippToPsps/config/tables.DF.vot	(revision 39071)
+++ trunk/ippToPsps/config/tables.DF.vot	(revision 39081)
@@ -4,5 +4,12 @@
   <RESOURCE>
     <TABLE name="DiffMeta">
-      <DESCRIPTION>Contains metadata related to a difference image constructed by subtracting the stacked image from the single epoch data.  The astrometric calibration of the reference stack is listed.</DESCRIPTION>
+
+      <DESCRIPTION>Contains metadata related to a difference image
+      constructed by subtracting a stacked image from a single epoch
+      image, or in the case of the MD Survey from a nightly stack
+      (stack made from all exposures in a single filter in a single
+      night).  The astrometric calibration of the reference stack is
+      listed.</DESCRIPTION>
+
       <PARAM arraysize="1" datatype="char" ucd="meta.bib.author" name="Author" value="PSPS"></PARAM>           
       <FIELD name="diffImageID" arraysize="1" datatype="long" unit="dimensionless" default="NA">
@@ -22,8 +29,8 @@
       </FIELD>
       <FIELD name="frameID" arraysize="1" datatype="int" unit="dimensionless" default="NA">
-        <DESCRIPTION>Frame/exposure identifier for the postitive image in warp-stack difference images.</DESCRIPTION>
+        <DESCRIPTION>Frame/exposure identifier for the postitive image in warp-stack difference images; not populated for stack-stack differences.</DESCRIPTION>
       </FIELD>
       <FIELD name="posImageID" arraysize="1" datatype="long" unit="dimensionless" default="NA">
-	<DESCRIPTION>Image identifier for the positive image.  For warp-stack difference images, this corresponds to the ForcedWarpToImage.forcedWarpID entry.</DESCRIPTION>
+	<DESCRIPTION>Image identifier for the positive image.  For warp-stack difference images, this corresponds to the ForcedWarpToImage.forcedWarpID entry.  For stack-stack difference images, this corresponds to StackMeta.stackImageID.  </DESCRIPTION>
       </FIELD>
       <FIELD name="negImageID" arraysize="1" datatype="long" unit="dimensionless" default="NA">
@@ -134,5 +141,5 @@
     </TABLE>
     <TABLE name="DiffDetection">
-      <DESCRIPTION>Contains the photometry of individual detections from the difference image.  The identifiers connecting the detection back to the difference image and to the object association are provided.  PSF, aperture, and Kron (1980) photometry are included, along with sky and detector coordinate positions.  Statistics  References: Kron, R. G. 1980, ApJS, 43, 305.</DESCRIPTION>
+      <DESCRIPTION>Contains the photometry of individual detections from a difference image.  The identifiers connecting the detection back to the difference image and to the object association are provided.  PSF, aperture, and Kron (1980) photometry are included, along with sky and detector coordinate positions.  Statistics  References: Kron, R. G. 1980, ApJS, 43, 305.</DESCRIPTION>
       <PARAM arraysize="1" datatype="char" ucd="meta.bib.author" name="Author" value="PSPS"></PARAM>
       <FIELD name="diffObjID" arraysize="1" datatype="long" unit="dimensionless" default="NA">
@@ -356,5 +363,5 @@
 
     <TABLE name="DiffDetEffMeta">
-      <DESCRIPTION>Contains the detection efficiency information for a given individual difference image.  Provides the number of recovered sources out of 500 and statistics about the magnitudes of the recovered sources for a range of magnitude offsets.</DESCRIPTION>
+      <DESCRIPTION>Contains the detection efficiency information for a given individual difference image.  Provides the number of recovered sources out of 500 injected sources and statistics about the magnitudes of the recovered sources for a range of magnitude offsets.</DESCRIPTION>
       <PARAM arraysize="1" datatype="char" ucd="meta.bib.author" name="Author" value="PSPS"></PARAM>
       <FIELD name="diffImageID" arraysize="1" datatype="long" unit="dimensionless" default="NA">
@@ -363,4 +370,7 @@
       <FIELD name="magref" arraysize="1" datatype="float" unit="magnitudes" default="NA">
         <DESCRIPTION>Detection efficiency reference magnitude.</DESCRIPTION>
+      </FIELD>
+      <FIELD name="nInjected" arraysize="1" datatype="int" unit="dimensionless" default="NA">
+        <DESCRIPTION>Number of fake sources injected in each magnitude bin.</DESCRIPTION>
       </FIELD>
       <FIELD name="offset01" arraysize="1" datatype="float" unit="magnitudes" default="NA">