<http://schema.org/valueRequired>	<http://www.w3.org/2000/01/rdf-schema#label>	"value required" .
<http://schema.org/valueRequired>	<http://www.w3.org/2000/01/rdf-schema#domain>	<http://schema.org/PropertyValueSpecification> .
<http://schema.org/valueRequired>	<http://www.w3.org/2000/01/rdf-schema#range>	<http://www.w3.org/2001/XMLSchema#boolean> .
<http://schema.org/valueRequired>	<http://www.w3.org/2000/01/rdf-schema#comment>	"Whether the property must be filled in to complete the action.  Default is false." .
<http://schema.org/valueRequired>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#DatatypeProperty> .