Hi,
In section "3.2.3.1 Node Styles" on line 2 the semicolon is followed by a capital letter "; In contrast".
I'm not a native english speaker but I have found there:
http://www.grammarly.com/handbook/punctuation/semicolon/1/semicolon-use/
that there shouldn't be a capital letter.
Best regards,
Laurent Lyaudet