@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_foundation_	skos:broader	isac:structural_system_ .
isac:_building_	skos:broader	isac:structural_system_ .
isac:_framework_	skos:broader	isac:structural_system_ .
isac:_language_	skos:broader	isac:structural_system_ .
isac:_floor_	skos:broader	isac:structural_system_ .
isac:_frame_	skos:broader	isac:structural_system_ .
isac:_type_	skos:broader	isac:structural_system_ .
isac:_wall_	skos:broader	isac:structural_system_ .
isac:_truss_	skos:broader	isac:structural_system_ .