code: def to_rtf
           text = StringIO.new
  
           text << "{#{prefix}\\#{@character_set.id2name}"
           text << "\\deff#{@default_font}"
           text << "\\deflang#{@language}" if !@language.nil?
           text << "\\plain\\fs24\\fet1"
           text << "\n#{@fonts.to_rtf}"
           text << "\n#{@colours.to_rtf}" if @colours.size > 0
           text << "\n#{@information.to_rtf}"
           text << "\n#{@lists.to_rtf}"
           if @headers.compact != []
              text << "\n#{@headers[3].to_rtf}" if !@headers[3].nil?
              text << "\n#{@headers[2].to_rtf}" if !@headers[2].nil?
              text << "\n#{@headers[1].to_rtf}" if !@headers[1].nil?
              if @headers[1].nil? or @headers[2].nil?
                 text << "\n#{@headers[0].to_rtf}"
              end
           end
           if @footers.compact != []
              text << "\n#{@footers[3].to_rtf}" if !@footers[3].nil?
              text << "\n#{@footers[2].to_rtf}" if !@footers[2].nil?
              text << "\n#{@footers[1].to_rtf}" if !@footers[1].nil?
              if @footers[1].nil? or @footers[2].nil?
                 text << "\n#{@footers[0].to_rtf}"
              end
           end
           text << "\n#{@style.prefix(self)}" if !@style.nil?
           self.each {|entry| text << "\n#{entry.to_rtf}"}
           text << "\n}"
  
           text.string
        end
docs: This method generates the RTF text for a Document object.