@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_keyboard_	skos:broader	isac:operator_interface_ .
isac:_system_	skos:broader	isac:operator_interface_ .
isac:control_panel_	skos:broader	isac:operator_interface_ .
isac:_display_	skos:broader	isac:operator_interface_ .
isac:toggle_switch_	skos:broader	isac:operator_interface_ .