* nonascii.texi (Character Properties): NAME or OLD-NAME
properties can be nil (there's no empty string).
+ (Character Properties): Update the reference to the UCD.
2013-12-22 Xue Fuqiao <xfq.free@gmail.com>
@uref{http://www.unicode.org/reports/tr23/, Unicode Character Property
Model}, and the Emacs character property database is derived from the
Unicode Character Database (@acronym{UCD}). See the
-@uref{http://www.unicode.org/versions/Unicode5.0.0/ch04.pdf, Character
+@uref{http://www.unicode.org/versions/Unicode6.2.0/ch04.pdf, Character
Properties chapter of the Unicode Standard}, for a detailed
description of Unicode character properties and their meaning. This
section assumes you are already familiar with that chapter of the