diff --git a/README b/README
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+Script to check LDAP syncrepl replication state between two servers
+===================================================================
+
+This script check LDAP syncrepl replication state between two servers.
+One server is consider as provider and the other as consumer.
+
+This script can check replication state with two method :
+ - by the fisrt, entryCSN of all entries of LDAP directory will be
+   compare between two servers
+ - by the second, all values of all atributes of all entries will
+   be compare between two servers.
+
+In all case, contextCSN of servers will be compare and entries not
+present in consumer or in provider will be notice. You can decide to
+disable contextCSN verification by using argument --no-check-contextCSN.
+
+This script is also able to "touch" LDAP object on provider to force
+synchronisation of this object. This mechanism consist to add '%%TOUCH%%'
+value to an attribute of this object and remove it just after. The
+touched attribute is specify by parameter --touch. Of course, couple of
+DN and password provided, must have write right on this attribute.
+
+To use this script as Nagios plugin, use -n argument
+
+Requirement
+-----------
+
+A single couple of DN and password able to connect to both server 
+and without restriction to retrieve objects from servers.
+
+Usage
+-----
+
+  Usage: check_syncrepl_extended [options]
+  
+  Options:
+    --version             show program's version number and exit
+    -h, --help            show this help message and exit
+    -p PROVIDER, --provider=PROVIDER
+                          LDAP provider URI (example :
+                          ldaps://ldapmaster.foo:636)
+    -c CONSUMER, --consumer=CONSUMER
+                          LDAP consumer URI (example :
+                          ldaps://ldapslave.foo:636)
+    -D DN, --dn=DN        LDAP bind DN (example :
+                          uid=nagios,ou=sysaccounts,o=example
+    -P PWD, --pwd=PWD     LDAP bind password
+    -b BASEDN, --basedn=BASEDN
+                          LDAP base DN (example : o=example)
+    -f FILTER, --filter=FILTER
+                          LDAP filter (default : (objectClass=*))
+    -d, --debug           Debug mode
+    -n, --nagios          Nagios check plugin mode
+    -q, --quiet           Quiet mode
+    --no-check-certificate
+                          Don't check the server certificate (Default : False)
+    --no-check-contextCSN
+                          Don't check servers contextCSN (Default : False)
+    -a, --attributes      Check attributes values (Default : check only
+                          entryCSN)
+    --exclude-attributes=EXCL_ATTRS
+                          Don't check this attribut (only in attribute check
+                          mode)
+    --touch=TOUCH         Touch attribute giving in parameter to force resync a
+                          this LDAP object from provider. A value '%%TOUCH%%'
+                          will be add to this attribute and remove after. The
+                          user use to connect to the LDAP directory must have
+                          write permission on this attribute on each object.
+
+
+Copyright
+---------
+
+Copyright (c) 2013 Benjamin Renard 
+
+License
+-------
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License version 2
+as published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
diff --git a/check_syncrepl_extended b/check_syncrepl_extended
index d7a4a27..b69bfad 100755
--- a/check_syncrepl_extended
+++ b/check_syncrepl_extended
@@ -9,8 +9,16 @@
 #    compare between two servers
 #  - by the second, all values of all atributes of all entries will
 #    be compare between two servers.
+#
 # In all case, contextCSN of servers will be compare and entries not
-# present in consumer or in provider will be notice.
+# present in consumer or in provider will be notice. You can decide to
+# disable contextCSN verification by using argument --no-check-contextCSN.
+#
+# This script is also able to "touch" LDAP object on provider to force
+# synchronisation of this object. This mechanism consist to add '%%TOUCH%%'
+# value to an attribute of this object and remove it just after. The
+# touched attribute is specify by parameter --touch. Of course, couple of
+# DN and password provided, must have write right on this attribute.
 #
 # This script could be use as Nagios plugin (-n argument)
 #