@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_interference_	skos:broader	isac:diffraction_grating_ .
isac:_device_	skos:broader	isac:diffraction_grating_ .
isac:_cd_	skos:broader	isac:diffraction_grating_ .
isac:_mirror_	skos:broader	isac:diffraction_grating_ .
isac:_lens_	skos:broader	isac:diffraction_grating_ .
isac:_prism_	skos:broader	isac:diffraction_grating_ .
isac:diffraction_grating_	skos:broader	isac:diffraction_grating_ .
isac:holographic_grating_	skos:broader	isac:diffraction_grating_ .