subject	object
http://www.openlinksw.com/schemas/bif#contains	http://www.openlinksw.com/schemas/bif#contains
http://www.openlinksw.com/schemas/bif#xcontains	http://www.openlinksw.com/schemas/bif#xcontains
http://www.openlinksw.com/schemas/bif#xpath_contains	http://www.openlinksw.com/schemas/bif#xpath_contains
http://www.openlinksw.com/schemas/bif#xquery_contains	http://www.openlinksw.com/schemas/bif#xquery_contains
http://www.openlinksw.com/schemas/bif#spatial_contains	http://www.openlinksw.com/schemas/bif#spatial_contains