xml_set_start_namespace_decl_handler Set up start namespace declaration handler &reftitle.description; truexml_set_start_namespace_decl_handler XMLParserparser callablestringnullhandler Set a handler to be called when a namespace is declared. Namespace declarations occur inside start tags. But the namespace declaration start handler is called before the start tag handler for each namespace declared in that start tag. &reftitle.parameters; &xml.parser.param; handler &xml.handler.description; The signature of the handler must be: voidhandler XMLParserparser stringfalseprefix stringuri &xml.handler.parser.param; prefix The prefix is a string used to reference the namespace within an XML object. &false; if no prefix exists. uri Uniform Resource Identifier (URI) of namespace. &reftitle.returnvalues; &return.true.always; &reftitle.changelog; &Version; &Description; &xml.changelog.handler-param; &xml.changelog.parser-param; &reftitle.seealso; xml_set_end_namespace_decl_handler