RELAX NG

RELAX NG is the name for the unification of two XML schema languages:

• TREX
• RELAX

The specification for RELAX NG has been developed by the OASIS RELAX NG TC.

The following are available:

• Jing, a validator for RELAX NG implemented in Java; this is an adaptation of the validator for TREX. This is written on top of SAX2.
• A compact syntax for RELAX NG.
• Trang, a program for translating RELAX NG schemas into other formats; in particular, this can be used to translate RELAX NG into DTDs and to translate the non-XML syntax into the standard syntax.
• DTDinst, a program for converting XML DTDs into RELAX NG.
• The Design of RELAX NG, a paper discussing the design of RELAX NG
• Notes on implementing RELAX NG validators. These describe the implementation techniques used in Jing.
• A RELAX NG schema for RELAX NG.
• A RELAX NG implementation of XHTML modularization.
• A RELAX NG schema for XSLT 1.0 stylesheets.
• An XSLT stylesheet that converts from RELAX Core into RELAX NG. This should be able to handle any correct RELAX Core module, but it does not implement the RELAX Core semantic of implicitly allowing undeclared attributes. (However, the sample implementation is capable of recovering from such errors.) Handling the RELAX include feature requires an extension over XSLT 1.0; the stylesheet can currently use the extensions implemented in either MSXML or SAXON; it can be easily adapted to any other conforming XSLT processor that supports a result tree fragment to node set conversion function. This stylesheet will not work with XT, since XT does not implement keys. There's also an auxiliary stylesheet that removes some redundancies generated by the previous stylesheet.
• A RELAX NG schema for RELAX Core, including the schema for datatypes. This was generated using the above stylesheets from the RELAX module for RELAX core, and then hand-edited a bit.
• A test suite for RELAX NG.