From e60abeea30c004cfe0dd619554e013ad76cf1dc2 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Sun, 15 Oct 2023 19:00:57 +0200
Subject: [3.11] gh-110886 Doc: add a link to BNF Wikipedia article (GH-110887)
 (#110901)

Co-authored-by: partev <petrosyan@gmail.com>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
---
 Doc/reference/introduction.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Doc/reference/introduction.rst b/Doc/reference/introduction.rst
index 81f0a5c..cf18670 100644
--- a/Doc/reference/introduction.rst
+++ b/Doc/reference/introduction.rst
@@ -90,7 +90,8 @@ Notation
 
 .. index:: BNF, grammar, syntax, notation
 
-The descriptions of lexical analysis and syntax use a modified BNF grammar
+The descriptions of lexical analysis and syntax use a modified
+`Backus–Naur form (BNF) <https://en.wikipedia.org/wiki/Backus%E2%80%93Naur_form>`_ grammar
 notation.  This uses the following style of definition:
 
 .. productionlist:: notation
-- 
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