<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT header (protocol,id)>
	<!ELEMENT protocol (type,version,command)>
		<!ELEMENT type (#PCDATA)>
		<!ELEMENT version (#PCDATA)>	
		<!ELEMENT command (#PCDATA)>
	<!ELEMENT id (name,email,homepage,host)>
		<!ELEMENT name (#PCDATA)>
		<!ELEMENT email (#PCDATA)>
		<!ELEMENT homepage (#PCDATA)>
		<!ELEMENT host (#PCDATA)>