@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_frame_	skos:broader	isac:compositional_device_ .
isac:_symmetry_	skos:broader	isac:compositional_device_ .
isac:_inversion_	skos:broader	isac:compositional_device_ .