XML documentation projects

Hello,

Suppose, I am starting a new project containing xml documentation.
That xml documentation will be processed by some tool which is able to
generate documentation from source xml files in various formats. Is
there any standard or preferable organization of catalogs for xml 
documentation projects?

For example, are there any thoughts what is a good place for source
xml files, dtd, xsd files, images and various binary files?


-- 
Best regards,
 Pavel                          mailto: