I also have to add that in all of the years I have done this
sort of work, the argument that "they won't edit this by hand"
is the first one to fall apart as soon as the spec is released.
Editors follow slowly and even when they do, the ability to
"hack the ASCII" is a capability you should defend with your
last breath. This was an argument presented for VRML as
well (by Gavin Bell, as a matter of fact). Truth is, we
use the editors for construction of complex objects, yes,
but we typically debug in ASCII with line numbers.
They will edit the DTDs raw. Count on it. It's actually
rather easy to do and that is from some years of doing it
with the Bad, Hard, We Hate The Syntax but Love the Concepts
parent: SGML. Frequency, occurrence and membership just
aren't that hard to grasp.
len