SELECT * 
WHERE { ?hcalendar <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2002/12/cal/icaltzd#vcalendar> . 
		OPTIONAL{ ?hcalendar <http://www.w3.org/2002/12/cal/icaltzd#component> ?comp . } 
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#uid> ?uid . } 
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#url> ?url . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#categories> ?category . } 
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#rrule> ?rrule . 
			?rrule <http://www.w3.org/2002/12/cal/icaltzd#freq> ?freq . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#organizer> ?organizer . 
			?organizer <http://www.w3.org/2002/12/cal/icaltzd#calAddress> ?organizerAdress . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#summary>  ?summary . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#class>  ?class . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#transp>  ?transp . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#description>  ?description . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#status>  ?status . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#location>  ?location . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#dtstart>  ?dtstart . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#dtstamp>  ?dtstamp . }
		OPTIONAL{ ?comp <http://www.w3.org/2002/12/cal/icaltzd#dtend>  ?dtend . }
			 }