2003-11-06 W3C XML 1.1, Namespaces in XML 1.1 が Proposed Recommendations dev Extensible Markup Language (XML) 1.1 http://www.w3.org/TR/2003/PR-xml11-20031105/ Namespaces in XML 1.1 http://www.w3.org/TR/2003/PR-xml-names11-20031105/