Hi Gavin, while doing some experiments with validating
our intermediate xml, i came across some changes where you
added a "rel=nofollow" to some of our external links.
That does not exist in our document-v13 DTD, so validation
is failing. That can be fixed by adding to that DTD.

What is the rationale for doing that?

Some of them are links to our own email discussions
in various archives.

-David