Here's some information about encodings.
A tutorial on character code issues
Jukka Korpela: Unicode Explained, p. 299
Q. Ethan McCallum: Bad Data Handbook, p. 57
Elliotte Rusty Harold, W. Scott Means: XML in a Nutshell, p. 600
Last modified: September 15th, 2013
Author: Tomi Häsä (tomi.hasa@gmail.com)
URL: http://sites.google.com/site/tomihasa/about-encodings