* UCD のライセンス

[1] [CITE@en-us[Unicode Terms of Use]] ([TIME[2011-02-17 08:57:14 +09:00]] 版) <http://www.unicode.org/copyright.html#Exhibit1>

[2] [CITE@en[Various Licenses and Comments about Them - GNU Project - Free Software Foundation (FSF)]] ([TIME[2011-04-04 23:42:47 +09:00]] 版) <http://www.gnu.org/licenses/license-list.html#Unicode>

[3] >>2 によればこのライセンスは [[GPL]] と互換性があります。

[4] [CITE@en-us[UAX #44: Unicode Character Database]]
( ([TIME[2013-09-27 22:15:15 +09:00]] 版))
<http://www.unicode.org/reports/tr44/>