Python validating sax parser
RELAX NG DTD Compatibility, OASIS Committee Specification, 3 December 2001. Reports on arguments advanced as to why RELAX NG is preferable to W3C XML Schema, in the context of IETF discussions on XML. Paper discussing the thinking behind the design of RELAX NG.
Defines annotations and datatypes that support some of the features from XML 1.0 DTDs not supported directly by RELAX NG. XML Matters: Kicking back with RELAX NG, Part 1, Part 2, Part 3, David Mertz, IBM developer Works.
ISO version of the RELAX NG Compact Syntax; RELAX NG Compact Syntax; the technical content of this is identical to the OASIS Committee Specification, but there are editorial changes to satisfy ISO rules. RELAX NG Specification (errata), OASIS Committee Specification, 3 December 2001. Can be used as a library for validation and for accessing the schema.