diff --git a/src/README b/src/README
index be81acb..08ea6b4 100644
--- a/src/README
+++ b/src/README
@@ -133,3 +133,7 @@
 key: type (int), value: 14
 key: session (string), value: unique session identifier
 
+12) Perform generic operation not included in base NETCONF
+key: type (int), value: 15
+key: session (string), value: unique session identifier
+key: content (string), value: XML data as content of the NETCONF's <rpc> envelope