@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_datum_	skos:broader	isac:readable_format_ .
isac:_html_	skos:broader	isac:readable_format_ .
isac:_pdf_	skos:broader	isac:readable_format_ .
isac:_jpeg_	skos:broader	isac:readable_format_ .