The Ten Commandments of Unicode

[nickb]

http://cafe.elharo.com/programming/the-ten-commandments-of-unicode/

[xirium]

From the article: Thou shalt steer clear of the private use area.

Due to the necessity of fonts requiring code points, the private use area is becoming a de facto fictional language area: http://www.evertype.com/standards/csur/index.html