Streaming Validation for XML: STX goes Schematron

["Trapp, Tobias" <Tobias.Trapp@sys.aok.de>]

At the moment I'm experimenting with a prototype of a validation 
language similar to Schematron but based on STX 
(http://stx.sourceforge.net). I invented this language to perform checks

that can't be coded with W3C XML Schema and apply it on XML documents
that 
are too big to be processed with XSLT or Schematron. I called this
language 
SVX (an acronym for Streaming Validation for XML).

If you are interested in my work I refer to my blog : 
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3978 .

In this blog I give a example for two arithmetical checks. The second
one 
uses a buffer to perform comparisons. In this blog you find a link to an

XSLT-implementation that generates STX from a STV schema. 

I wonder whether there are other similar approaches. And if I didn't 
reinvent the wheel, do you think this approach could be worth for
further 
work?

Regards,
Tobias