XSD 1.1 validation in Java

Hello,

I'm trying to find a way to validate an XML document against an 1.1 XML 
Schema.
I have to rely only on open source dependencies, as my product is 
licensed under MPL 2.0 ; sorry Mike, it's much more easy with Saxon PE, 
but, here, I can't use it ;)

I've googled almost everywhere, but definitely found nothing that really 
works.

I've tried xerces-2j xsd11 beta, but I have a lack of dependency on 
java_cup, and can not find how to solve it.

Does someone knows how - or have an existng chunk of code - to solve my 
problem ?

The schema I test on is this one, which is pretty simple : 
https://github.com/cmarchand/gaulois-pipe/blob/listener/src/main/resources/fr/efl/chaine/xslt/schemas/gaulois-pipe_config.xsd
There is only one assert, at row 198

Thanks in advance,
Christophe