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-rw-r--r--doc/src/sgml/func.sgml7
1 files changed, 5 insertions, 2 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index fc4b9537871..91557f4fb0f 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -3110,8 +3110,11 @@ SELECT NOT(ROW(table.*) IS NOT NULL) FROM TABLE; -- detect at least one null in
</para>
<para>
Converts the first letter of each word to upper case and the
- rest to lower case. Words are sequences of alphanumeric
- characters separated by non-alphanumeric characters.
+ rest to lower case. When using the <literal>libc</literal> locale
+ provider, words are sequences of alphanumeric characters separated
+ by non-alphanumeric characters; when using the ICU locale provider,
+ words are separated according to
+ <ulink url="https://www.unicode.org/reports/tr29/#Word_Boundaries">Unicode Standard Annex #29</ulink>.
</para>
<para>
<literal>initcap('hi THOMAS')</literal>