diff --git a/README.md b/README.md
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@@ -2,6 +2,7 @@
 
 Package **rfc2234** is an implementation of (parts of) IETF RFC 2234, for the Go programming language.
 
+Augmented BNF for Syntax Specifications: ABNF (November 1997)  
 https://datatracker.ietf.org/doc/html/rfc2234
 
 ## Documention