Complex validation

[Emanuel Bulic <Em...@galegroup.com>]

Hi all,
 
I've been given the task to investigate ways of validating XML content,
using schema.  Ok... schemas ar nice, but there's a lot more things we need
to do.  I've looked into using transformations, with XPath and plugging in
java extensions (xalan).  This seems to work.
 
My question is, are there better and faster ways of performing complex
content validation?  One of the things we need to do is validate an address
against a database (zipcode, city, state, etc.).
 
Thanks,
Emanuel Bulic.