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ISO/IEC 19757-2:2003

Information technology -- Document Schema Definition Language (DSDL) -- Part 2: Regular-grammar-based validation -- RELAX NG

This standard has been revised by: ISO/IEC 19757-2:2008

Note: The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site



ISO/IEC 19757-2:2003 specifies RELAX NG, a schema language for XML. A RELAX NG schema specifies a pattern for the structure and content of an XML document. The pattern is specified by using a regular tree grammar. A RELAX NG schema is itself an XML document.

ISO/IEC 19757-2:2003 specifies:

  • when an XML document is a correct RELAX NG schema; and
  • when an XML document is valid with respect to a correct RELAX NG schema.


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