This is the definitive specification of RELAX NG, a simple schema language for XML, based on RELAX and TREX. A RELAX NG schema specifies a pattern for the structure and content of an XML document. A RELAX NG schema is itself an XML document.
This document specifies a compact, non-XML syntax for RELAX NG.
This specification defines datatypes and annotations for use in RELAX NG schemas. The purpose of these datatypes and annotations is to support some of the features of XML 1.0 DTDs that are not supported directly by RELAX NG.