Right after I posted this, I found:
http://www.hitsw.com/xml_utilites/
On 9/10/07, William M. Saxton <saxton_at_gmail.com> wrote:
> I don't know if there is a JAXB/XJCTask way of doing this, but I
> remember years ago being able to generate an XML Schema from XML data,
> but I forget what I used.
>
> Any ideas?
>