The Unicode Consortium, Reading, MA, Addison-Wesley, 2016.
The Unicode Standard
as updated from time to time by the publication of new versions. See
http://www.unicode.org/standard/versions/
for the latest version and additional information on versions of the standard and
of the Unicode Character Database.
The version of Unicode to be used is
·implementation-defined·,
but implementations are recommended to use the latest Unicode version;
currently, Version 9.0.0.