C14n2 specifies a canonical XML document. This library writes such a document from an XML DOM as returned by the XML (or SGML) parser. The process takes two steps:

• Normalise the DOM
• Call xml_write/3 with appropriate flags

 xml_write_canonical(+Stream, +DOM, +Options) is det

Write an XML DOM using the canonical conventions as defined by C14n2. Namespace declarations in the canonical document depend on the original namespace declarations. For this reason the input document must be parsed (see load_structure/3) using the dialect xmlns and the option keep_prefix(true).