Re: [xml-dev] Non XML syntaxes

John Cowan wrote, quoting http://www.idealliance.org/papers/extreme02/html/2002/Rosenblum01/EML2002Rosenblum01.html:

# While there are many advantages to converting SGML at Highwire rather than
# at the publisher, there is one significant disadvantage: if a publisher
# significantly upgrades their DTD, a full-fledged parser update, coupled
# with extensive integrity testing, is required at Highwire.

And in the larger internetworked world limned in WP v. EE, so major a change in what one node produces is an appropriate occasion to inquire whether a particular downstream node remains an appropriate consumer of the altered node's output.