    # File lib/nokogiri/xml/sax/document.rb, line 107
            def start_element_namespace name, attrs = [], prefix = nil, uri = nil, ns = []
              ###
              # Deal with SAX v1 interface
              name = [prefix, name].compact.join(':')
              attributes = ns.map { |ns_prefix,ns_uri|
                [['xmlns', ns_prefix].compact.join(':'), ns_uri]
              } + attrs.map { |attr|
                [[attr.prefix, attr.localname].compact.join(':'), attr.value]
              }
              start_element name, attributes
            end