RELAX NG


RELAX NG

In computing, RELAX NG (REgular LAnguage for XML Next Generation) is a 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 RELAX NG Compact Syntax] ] Compared to other popular schema languages, RELAX NG is relatively simple.It is defined by a committee specification of the OASIS RELAX NG technical committee, and also by part two of the international standard ISO/IEC 19757: Document Schema Definition Languages (DSDL). [ [http://www.oasis-open.org/committees/relax-ng/spec-20011203.html RELAX NG Specification] ] [ [http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=relax-ng RELAX NG Technical Committee] ]

chema examples

Suppose we want to define an extremely simple XML markup scheme for a book: a book is defined as a sequence of one or more pages; each page contains text only. A sample XML document instance might be:


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