Index: trunk/Ohana/src/libdvo/include/dvo.h
===================================================================
--- trunk/Ohana/src/libdvo/include/dvo.h	(revision 15722)
+++ trunk/Ohana/src/libdvo/include/dvo.h	(revision 15743)
@@ -22,4 +22,6 @@
 typedef enum {T_UNDEF = -1, T_NONE, T_OBJECT, T_DARK, T_BIAS, T_FLAT, T_MASK, T_FRINGE, T_SCATTER, T_MODES, T_FRINGEPTS, T_ANY, N_TYPE} ElixirDetrendTypes;
 typedef enum {M_UNDEF = -1, M_NONE, M_MEF, M_SPLIT, M_SINGLE, M_CUBE, M_SLICE, M_MODES, N_MODE} ElixirDetrendModes;
+
+typedef enum {DVO_CAT_OPEN_FAIL, DVO_CAT_OPEN_OK, DVO_CAT_OPEN_EMPTY} DVOCatalogOpenModes;
 
 typedef enum {
@@ -195,8 +197,16 @@
   Missing *missing; 
   SecFilt *secfilt;
-  int Naverage, Nmeasure, Nmissing, Nsecfilt;   /* current number of each component */
-  int Nave_disk, Nmeas_disk, Nmiss_disk;        /* number of component on disk */
-  int Nmeas_off;			        /* dist seq of first loaded data value */
-  /* note the different counting for Nsecfilt */
+
+  int Nsecfilt;  /* number of secfilt entries for each average entry */
+  int Naverage,   Nmeasure,   Nmissing,   Nsecf_mem;  /* current number of each component in memory */
+  int Naves_disk, Nmeas_disk, Nmiss_disk, Nsecf_disk; /* current number of each component on disk */
+  int Naves_off,  Nmeas_off,  Nmiss_off,  Nsecf_off;  /* index of first loaded data value */
+
+  /* note the different counting for Nsecfilt:
+     number of secfilt rows on disk is: Nave_disk * Nsecfilt
+     number of secfilt rows in mem  is: Naverage * Nsecfilt
+     *** that is just silly, and bad: convert to using Nsec_mem, Nsec_disk, Nsec_off.
+     *** unless we always require the secfilt and average entries to be loaded sychronously.
+   */
 
   /* pointers to split data files */