@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_gcc_	skos:broader	isac:gnu_tool_ .
isac:_windows_	skos:broader	isac:gnu_tool_ .
isac:_linux_	skos:broader	isac:gnu_tool_ .
isac:_make_	skos:broader	isac:gnu_tool_ .
isac:_autoconf_	skos:broader	isac:gnu_tool_ .