@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:e-mail_address_	skos:broader	isac:optional_field_ .
isac:_comment_	skos:broader	isac:optional_field_ .
isac:_country_	skos:broader	isac:optional_field_ .
isac:_field_	skos:broader	isac:optional_field_ .
isac:_information_	skos:broader	isac:optional_field_ .
isac:_description_	skos:broader	isac:optional_field_ .
isac:_date_	skos:broader	isac:optional_field_ .
isac:_item_	skos:broader	isac:optional_field_ .
isac:_name_	skos:broader	isac:optional_field_ .
isac:_address_	skos:broader	isac:optional_field_ .
isac:_email_	skos:broader	isac:optional_field_ .