ISO/IEC 19757-4 NVDL
Tutorials:
NVDL tutorial
An introduction to NVDL, ISO 19757-4
http://nvdl.org
Our papers about validation:
Advanced approaches to XML document validation (Extreme 2007)
NVDL – a breath of fresh air for compound document validation (XTech 2007)
Relaxed—on the Way Towards True Validation of Compound Documents (WWW 2006)
Mailing lists:
<dsdl-comment@dsdl.org>
<public-schemata-users@w3.org>
<xml-dev@lists.xml.org>