THB version:THB1A, HTML:3(3:*), revision:31.12.2003,0

The revision can be viewed in the first line of report:
* guncoder report /usr/share/unicodeplus/unicode256.thb

The version of these THB tables is named 2004.00,
and refer to the version 4.0 of Unicode.
Refer to the current standard :
* http://www.unicode.org/versions/Unicode4.1.0/.