XML document production resources and tools

I'd like to decorate the spec-prod list page [1] with pointers to
spec-prod DTDs, schemas, example documents, and tools. Could y'all
send me what you know of and tell me if all this is doc'd elsewhere?

[1] http://lists.w3.org/Archives/Public/spec-prod/
-- 
-eric

(eric@w3.org)