Editing XML (section)

=== RELAX NG ===
{{Main|RELAX NG}}

[[RELAX NG]] (Regular Language for XML Next Generation) was initially specified by [[OASIS (organization)|OASIS]] and is now a standard (Part 2: ''Regular-grammar-based validation'' of [[DSDL|ISO/IEC 19757 – DSDL]]). RELAX NG schemas may be written in either an XML based syntax or a more compact non-XML syntax; the two syntaxes are [[isomorphic]] and [[James Clark (programmer)|James Clark]]'s conversion tool—[http://www.thaiopensource.com/relaxng/trang.html Trang]—can convert between them without loss of information. RELAX NG has a simpler definition and validation framework than XML Schema, making it easier to use and implement. It also has the ability to use [[datatype]] framework [[Plug-in (computing)|plug-ins]]; a RELAX NG schema author, for example, can require values in an XML document to conform to definitions in XML Schema Datatypes.