DOCTYPE as a string

[Chris Hill <ch...@wolfram.com>]

Is there any way to use Xerces to recover the doctype declaration from the 
input?  I'm not particularly interested in its contents, I'd just like to 
preserve it as it appeared if possible.  I don't need to know about the 
contents of the external subset.  Is installing a interceptor 
DocTypeHandler which calls the original and records the relevant 
information the best I can do?  I imagine such a handler could not preserve 
the input exactly but would be able to produce an equivalent declaration.

Chris