Schematron Specification
- A tree-pattern schema language, assertion-based rather than grammar-based, built on top of XSLT with XPath.
- http://xml.ascc.net/resource/schematron/schematron.html

Topologi Schematron Validator
- Shareware that validates XML documents using Schematron, DTDs, and W3C XML Schemas
- http://www.topologi.com/products/validator/index.html

Schematron Tutorial at Zvon
- A tutorial for Schematron with many examples.
- http://www.zvon.org/xxl/SchematronTutorial/General/contents.html

Schematron reference at Zvon
- A complete reference for Schematron with examples.
- http://www.zvon.org/ZvonSW/ZvonSchematron/Reference/Output/index.html