@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_mongodb_	skos:broader	isac:document-oriented_database_ .
isac:_couchdb_	skos:broader	isac:document-oriented_database_ .
isac:apache_couchdb_	skos:broader	isac:document-oriented_database_ .
isac:_couchbase_	skos:broader	isac:document-oriented_database_ .