Index: sources/storage/logger.h
===================================================================
diff -u -r94f7349bd073a732dba5295250fc0e26f740743c -r2437559b2d4cd4c2ac6a926b4f55652e55e1f616
--- sources/storage/logger.h	(.../logger.h)	(revision 94f7349bd073a732dba5295250fc0e26f740743c)
+++ sources/storage/logger.h	(.../logger.h)	(revision 2437559b2d4cd4c2ac6a926b4f55652e55e1f616)
@@ -58,7 +58,6 @@
                 LOG_DATUM(vCONTENT);            \
     }
 
-
 // forward declarations
 class tst_logging;
 
@@ -97,22 +96,22 @@
     QDir _dir;
     QHash<LogType, QString     > _logPathNames;
     QHash<LogType, const char *> _logBasePathNames {
-        { eLogEvent,  "log/event/" },
-        { eLogError,  "log/error/" },
-        { eLogDatum,  "log/event/" }, // "log/datum/"
+        { eLogEvent,  "log/" },
+        { eLogDatum,  "log/" },
+        { eLogError,  "log/" },
     };
     QHash<LogType, const char *> _logPrefix {
-        { eLogEvent,  "Event" },
-        { eLogError,  "Error" },
-        { eLogDatum,  "Datum" },
+        { eLogEvent,  "E" },
+        { eLogDatum,  "D" },
+        { eLogError,  ""  }, // it has its own file and all the content are Errors
     };
 
     const char *_dateFormat = "yyyy_MM_dd";
     const char *_timeFormat = "HH:mm:ss";
 
-    const char *_prefixSeparator = ": " ;
-    const char *_dateSeparator   = "_"  ;
-    const char *_timeSeparator   = " , ";
+    const char *_dateSeparator   = "_"; // used in filename
+    const char *_prefixSeparator = ",";
+    const char *_timeSeparator   = ",";
 
     QString     _logFileName     = "";