<http://www.w3.org/1999/xhtml/vocab>	<http://xmlns.com/foaf/0.1/topic>	<http://www.w3.org/1999/xhtml/vocab#button> .
<http://www.w3.org/1999/xhtml/vocab#button>	<http://www.w3.org/2007/05/powder-s#describedby>	<http://demo.openlinksw.com/about/id/entity/http/www.w3.org/1999/xhtml/vocab> .
<http://www.w3.org/1999/xhtml/vocab#button>	<http://www.w3.org/2000/01/rdf-schema#comment>	"An input\n      that allows for user-triggered actions when clicked or pressed. Also see\n      link."^^<http://www.w3.org/2001/XMLSchema#string> .
<http://www.w3.org/1999/xhtml/vocab#button>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#Property> .