Index: trunk/Ohana/src/libautocode/def/SkyRegion.d
===================================================================
--- trunk/Ohana/src/libautocode/def/SkyRegion.d	(revision 5945)
+++ trunk/Ohana/src/libautocode/def/SkyRegion.d	(revision 33647)
@@ -8,10 +8,26 @@
 FIELD   Dmin,	   D_MIN,	   float, 
 FIELD   Dmax,	   D_MAX,	   float, 
-FIELD   childS,	   CHILD_S,	   int,           sequence number in full table of first child
-FIELD   childE,	   CHILD_E,	   int,           sequence number in full table of last child + 1
-FIELD   parent,	   PARENT,	   int,           sequence number in full table of parent
-FIELD   index,     INDEX,          int,           sequence number in full table of this entry
-FIELD   depth,	   DEPTH,	   char,          depth of this entry
-FIELD   child,	   CHILD,	   char,          does this entry have children?
-FIELD   table,	   TABLE,	   char,          does this entry have a table?
-FIELD   name,      NAME,           char[21],      name / filename
+FIELD   childS,	   CHILD_S,	   int,            sequence number in full table of first child
+FIELD   childE,	   CHILD_E,	   int,            sequence number in full table of last child + 1
+FIELD   parent,	   PARENT,	   int,            sequence number in full table of parent
+FIELD   index,     INDEX,          int,            sequence number in full table of this entry
+FIELD   depth,	   DEPTH,	   char,           depth of this entry
+FIELD   child,	   CHILD,	   char,           does this entry have children?
+FIELD   table,	   TABLE,	   char,           does this entry have a table?
+FIELD   name,      NAME,           char[18],       name / filename
+FIELD   hostFlags, HOST_FLAGS,     char,           flags to define host / backup usage
+FIELD   hostID,    HOST_ID,        unsigned char,  host ID where data is stored
+FIELD   backupID,  BACKUP_ID,      unsigned char,  host ID where backup is stored
+
+# note : 2012.02.05 : stole 3 bytes from 'name' to use for host ID and
+#        related (no DBs were created with more than 17 bytes in the
+#        name).  The hostID points at an entry in the host table (text
+#        file, with name given in SkyTable PHU header).  There is no
+#        safety on this, but it is recoverable (by examining the
+#        directories) if misplaced.
+ 
+#        Note that SkyTables from databases generated in the past may
+#        have garbage characters here.  To ensure catch this
+#        condition, we add a header keyword to SkyTables in which the
+#        hostID has been set; if that is not present, the SkyTable
+#        loading software should init these bytes to 0 (== unassigned).