# File lib/xtemplate/xml.rb, line 133
    def on_doctype(root,pubid,sysid)
      if( pubid )
        if( sysid )
          push_content("<!DOCTYPE #{root} PUBLIC \"#{pubid}\" \"#{sysid}\">")
        else
          push_content("<!DOCTYPE #{root} PUBLIC \"#{pubid}\">")
        end
      else
        if( sysid )
          push_content("<!DOCTYPE #{root} SYSTEM \"#{sysid}\">")
        else
          push_content("<!DOCTYPE #{root}>")
        end
      end
      push_content(NEWLINE)
    end