<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#label>	"Optional" .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#label>	"Optionele" .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#range>	<http://www.w3.org/2001/XMLSchema#boolean> .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#label>	"Opcional" .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#Property> .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#label>	"Optional" .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#domain>	<http://lemon-model.net/lemon#Argument> .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#DatatypeProperty> .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#label>	"Optionnel" .
<http://lemon-model.net/lemon#optional>	<http://www.w3.org/2000/01/rdf-schema#comment>	"Denotes that the syntactic argument is optional (may be omitted)" .