In computing, RELAX Next Generation (RELAX NG) is a simple yet elegant schema language for XML, based on Murata Makoto's RELAX and James Clark's 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; however, RELAX NG also offers a popular compact, non-XML syntax (http://www.oasis-open.org/committees/relax-ng/compact-20021121.html).

It is specified by a committee specification (http://www.oasis-open.org/committees/relax-ng/spec-20011203.html) of the OASIS RELAX NG technical committee (http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=relax-ng), and also as an international standard ISO/IEC 19757-2 the Document Schema Definition Languages (DSDL).

See also

• Schematron
• XML Schema

External links

• RELAX NG home page (http://relaxng.org/)
• "The Design of RELAX NG" (http://www.thaiopensource.com/relaxng/design.html) by James Clark
• RELAX NG tutorial for the XML syntax (http://www.oasis-open.org/committees/relax-ng/tutorial-20011203.html)
• RELAX NG tutorial for the compact syntax (http://relaxng.org/compact-tutorial-20030326.html)
• Design patterns for structuring XML documents (http://www.xmlpatterns.com/)
• Relax NG XML - The Book (http://www.xml-dev.com:8080/tldp/http%3a//books.xmlschemata.org/relaxng/docbook/book.xml)

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