There was a thread recently about validating a directory of files
using a cached schema.  I've now added this facility to Kernow, using
SaxonSA, Xerces or any other JAXP processor on the classpath.

Kernow can be downloaded from:

http://sourceforge.net/projects/kernowforsaxon/

Kernow is a graphical front end for Saxon written in Java 1.5.  It's
intended for anyone who currently uses Saxon to process directories of
XML and would benefit from the caching, or who uses Saxon from the
command line and gets fed up typing in paths each day  :)  Although it
started life purely as a utility for running transforms, it can run
XQueries too and now perform directory validation using XSD or RNG.

- Added optional caching URI and entity resolvers (including an entity
resolver for documents referenced through the collection() function)
- Added directory validation using SaxonSA, Xerces or JAXP (choice of
XSD or RNG where possible).
- Added the ability to run schema aware XQueries
- Added default, lax and strict validation for schema aware transforms
and queries
- Added the ability to choose the type of files to process in a
directory (eg, xml, xhtml, or well-formed html)
- Fixed a number of small bugs

cheers
andrew