# File lib/active_ldap/xml.rb, line 18
      def to_s
        root = @options[:root]
        indent = @options[:indent] || 2
        xml = @options[:builder] || Builder::XmlMarkup.new(:indent => indent)
        xml.tag!(root) do
          target_attributes.each do |key, values|
            values = normalize_values(values).sort_by {|value, _| value}
            if @schema.attribute(key).single_value?
              serialize_attribute_value(xml, key, *values[0])
            else
              serialize_attribute_values(xml, key, values)
            end
          end
        end
      end