Can XML be documented using Doxygen, Sandcastle, or other documentation generators?

Question

I am currently using Sandcastle, Doxygen, and JavaDoc to generate documentation for code I have written. Is it possible to document XML schemas using these packages? If not,

Answer 1

The only tool that I know of that can document XML schemas is DocFlex/XML XSDDoc. Quite frankly, I don't have much experience using it but for what little use I did have of it, it did a pretty good job.