From 981d6b9bddacee6a204ac48f2a4e27f4cca1bd47 Mon Sep 17 00:00:00 2001
From: Inari Listenmaa <inari.listenmaa@gmail.com>
Date: Thu, 20 Feb 2025 20:52:21 +0100
Subject: [PATCH] Specify that extending a grammar doesn't inherit the startcat

---
 doc/tutorial/gf-tutorial.t2t | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc/tutorial/gf-tutorial.t2t b/doc/tutorial/gf-tutorial.t2t
index a734a57b6..c4ccb6aab 100644
--- a/doc/tutorial/gf-tutorial.t2t
+++ b/doc/tutorial/gf-tutorial.t2t
@@ -1739,6 +1739,13 @@ A new module can **extend** an old one:
       Pizza : Kind ;
   }
 ```
+Note that the extended grammar doesn't inherit the start 
+category from the grammar it extends, so if you want to 
+generate sentences with this grammar, you'll have to either 
+add a startcat (e.g. ``flags startcat = Question ;``),
+or in the GF shell, specify the category to ``generate_random`` or ``geneate_trees``
+(e.g. ``gr -cat=Comment`` or ``gt -cat=Question``).
+
 Parallel to the abstract syntax, extensions can
 be built for concrete syntaxes:
 ```