notes on quoting

diff --git a/doc/antora/modules/reference/pages/xlat/alternation.adoc b/doc/antora/modules/reference/pages/xlat/alternation.adoc
index c3025a7efee901b8cd36f16e1b7c73795668c132..2f9333e6df97ba383dc264f72843bf692f616aa3 100644 (file)
--- a/doc/antora/modules/reference/pages/xlat/alternation.adoc
+++ b/doc/antora/modules/reference/pages/xlat/alternation.adoc
@@ -19,5 +19,10 @@ in an expression.  This approach also means that nested alternation is no longer
 &Reply-Message := "Hello %{&NAS-Identifier || &User-Name || 'none'}"
 ----
 
+[NOTE]
+====
+Any strings in an alternation like above must be quoted.  Numbers and IP addresses do not need to be quoted.
+====
+
 // Copyright (C) 2021 Network RADIUS SAS.  Licenced under CC-by-NC 4.0.
 // This documentation was developed by Network RADIUS SAS.