@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_hub_	skos:broader	isac:usb_controller_ .
isac:_controller_	skos:broader	isac:usb_controller_ .
isac:usb_device_	skos:broader	isac:usb_controller_ .