Re: [tei-council] att.global.source

I have to go to a doctor's appt now, but can check-in a fix for this in a few hours if you (the release techs) like. I also have cleaned up references to @render, as it will be removed on 2017-01-01 or so. Back in a few hours.

In both the prose (1.3.1.1.4 "Sources, certainty, and responsibility") and the tagdoc discussing the new att.global.source, URIs are divided into "full", "fragmentary", and "private-URI syntax". I'm not sure what these mean. I would prefer we divide the world of our URIs up into "absolute", "relative", and something like "private URI that will be expanded to an absolute URI as documented in a <preFixDef> in the TEI header".