@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_disk_	skos:broader	isac:virtual_device_ .
isac:_volume_	skos:broader	isac:virtual_device_ .
isac:_window_	skos:broader	isac:virtual_device_ .
isac:_timer_	skos:broader	isac:virtual_device_ .
<http://webisa.webdatacommons.org/concept/_dev%2Fzero_>	skos:broader	isac:virtual_device_ .