<?xml encoding="UTF-8"?>
<!ELEMENT box (penguin | floppydisk)*>
<!ATTLIST box size	(small | large)	#REQUIRED
	label	CDATA			#IMPLIED
	color	(brown | white)	 #IMPLIED>
<!ELEMENT penguin EMPTY>
<!ATTLIST penguin size	(15cm | 30cm) 	#REQUIRED
	name	(tux | barbie)	#IMPLIED>
<!ELEMENT floppydisk (software)*>
<!ATTLIST floppydisk size	(1440 | 1200 | 720 | 360)	#REQUIRED>
<!ELEMENT software EMPTY>
<!ATTLIST software title		CDATA			#REQUIRED>