<!ELEMENT channels ((errorcd),(errortxt),(channel*))>
  <!ELEMENT errorcd (#PCDATA)>
  <!ELEMENT errortxt (#PCDATA)>
  <!ELEMENT channel ((channelid),(channelname))>
	  <!ELEMENT channelid (#PCDATA)>
	  <!ELEMENT channelname (#PCDATA)>

<!--
()-one occurrence
(+)-one or more occurrence
(*)-0 or more occurrence
(?)-0 or 1 occurrence

-->