http://www.tei-c.org/Guidelines2/gentleintro.html
http://www.peachpit.com/articles/article.asp?p=31322&rl=1
http://www.xml.com/pub/a/2005/06/01/tmql.html
http://www.w3schools.com/xml/default.asp
http://lucas.ucs.ed.ac.uk/xml-schema/
http://www.idealliance.org/xmlfiles/issue37/techwriting.asp
http://www.criticism.com/dita/