Following on from the meetup Universal install script (From Xwiki hangouts meet 8)
Also following on, the XML format of the freebsd manuals is actually DOCBOOK: [doc] Contents of /head/en_US.ISO8859-1/books/handbook/book.xml
here is the base directory:
https://svnweb.freebsd.org/doc/head/en_US.ISO8859-1/books/handbook/