@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_circuit_	skos:broader	isac:reference_potential_ .
isac:_ground_	skos:broader	isac:reference_potential_ .
isac:_transistor_	skos:broader	isac:reference_potential_ .
isac:_volt_	skos:broader	isac:reference_potential_ .
isac:ground_potential_	skos:broader	isac:reference_potential_ .
isac:system_ground_	skos:broader	isac:reference_potential_ .
isac:_vss_	skos:broader	isac:reference_potential_ .
isac:ground_voltage_	skos:broader	isac:reference_potential_ .