@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_maintenance_	skos:broader	isac:system_development_ .
isac:_requirement_	skos:broader	isac:system_development_ .
isac:_system_	skos:broader	isac:system_development_ .
isac:_website_	skos:broader	isac:system_development_ .
isac:_following_	skos:broader	isac:system_development_ .