@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:datum_warehouse_	skos:broader	isac:column-oriented_database_ .
isac:_cassandra_	skos:broader	isac:column-oriented_database_ .
isac:_hbase_	skos:broader	isac:column-oriented_database_ .
isac:_infobright_	skos:broader	isac:column-oriented_database_ .