Index: trunk/FACT++/src/dataLogger.cc
===================================================================
--- trunk/FACT++/src/dataLogger.cc	(revision 10896)
+++ trunk/FACT++/src/dataLogger.cc	(revision 10897)
@@ -2548,13 +2548,14 @@
     cout <<
         "\n"
-        "The block option has priority over the allow, "
-        "i.e. if both are present, only the block list is kept. "
-        "If only a server name or service without its server prefix is given "
-        "then all the services of that server, or all the services that "
-        "correspond to the given suffix are ignored or considered.\n"
+        "If the allow list has any element, only the servers and/or services "
+        "specified in the list will be used for subscription. The black list "
+        "will disable service subscription and has higher priority than the "
+        "allow list. If the allow list is not present by default all services "
+        "will be subscribed."
         "\n"
-        "For example, block=DIS_DNS will skip all the services offered by "
-        "the DIS_DNS server, while block=SERVICE_LIST will skip all the "
-        "SERVICE_LIST services offered by any server.\n"
+        "For example, block=DIS_DNS/ will skip all the services offered by "
+        "the DIS_DNS server, while block=/SERVICE_LIST will skip all the "
+        "SERVICE_LIST services offered by any server and DIS_DNS/SERVICE_LIST "
+        "will skip DIS_DNS/SERVICE_LIST.\n"
         "\n"
         "The commands offered by the dataLoger are the following: \n";