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-rw-r--r--doc/src/sgml/release.sgml3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/sgml/release.sgml b/doc/src/sgml/release.sgml
index 339618ddd29..18b812c1660 100644
--- a/doc/src/sgml/release.sgml
+++ b/doc/src/sgml/release.sgml
@@ -27,7 +27,8 @@ non-ASCII characters find using grep -P '[\x80-\xFF]'
http://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
We cannot use UTF8 because back branches still use SGML Docbook,
- which does not support it.
+ which does not support it. Also, rendering engines have to
+ support the referenced characters.
Do not use numeric _UTF_ numeric character escapes (&#nnn;),
we can only use Latin1.