Hi Tom,
There is a broken link on “what is an archetype” page (http://www.openehr.org/116-OE.html?branch=1&language=1), which links to the archetype paper hosted on http://www.deepthought.com.au/. But the site seems to be down at the moment.
Maybe we could host the paper on the openEHR site instead.
Cheers,
Rong