@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_event_	skos:broader	isac:synchronization_object_ .
isac:_lock_	skos:broader	isac:synchronization_object_ .
isac:_mutex_	skos:broader	isac:synchronization_object_ .
isac:_semaphore_	skos:broader	isac:synchronization_object_ .
isac:critical_section_	skos:broader	isac:synchronization_object_ .
isac:condition_variable_	skos:broader	isac:synchronization_object_ .