Index: trunk/doc/pslib/psLibSDRS.tex
===================================================================
--- trunk/doc/pslib/psLibSDRS.tex	(revision 6532)
+++ trunk/doc/pslib/psLibSDRS.tex	(revision 6613)
@@ -1,3 +1,3 @@
-%%% $Id: psLibSDRS.tex,v 1.387 2006-03-06 23:12:45 price Exp $
+%%% $Id: psLibSDRS.tex,v 1.388 2006-03-17 00:05:48 eugene Exp $
 \documentclass[panstarrs,spec]{panstarrs}
 
@@ -2707,9 +2707,10 @@
 
 \begin{datatype}
-typedef enum {                          ///< option flags for psMetadata functions
-    PS_META_DEFAULT         = 0,        ///< default behavior (0x0000) for use in mode above
+typedef enum {                           ///< option flags for psMetadata functions
+    PS_META_DEFAULT         = 0,         ///< default behavior (0x0000) for use in mode above
     PS_META_REPLACE         = 0x1000000, ///< allow entry to be replaced
-    PS_META_DUPLICATE_OK    = 0x2000000, ///< allow duplicate entries
-    PS_META_NULL            = 0x4000000 ///< psMetadataItem.data is a NULL value
+    PS_META_NO_REPLACE      = 0x2000000, ///< duplicate entry is silently skipped
+    PS_META_DUPLICATE_OK    = 0x4000000, ///< allow duplicate entries
+    PS_META_NULL            = 0x8000000  ///< psMetadataItem.data is a NULL value
 } psMetadataFlags;
 \end{datatype}
@@ -3665,5 +3666,7 @@
 standard (1 means first pixel; lower and upper values are included),
 which simply involves subtracting one from \code{x0} and \code{y0}
-when going from a string representation to a \code{psRegion}.
+when going from a string representation to a \code{psRegion}.  A
+\code{NULL} string is allowed and is equivalent to the default region
+(\code{0:0,0:0}).
 
 \begin{prototype}