: virtualhttp://www.w3.org/ns/csvw# Create a prefix for http://www.w3.org/ns/csvw# Hit Enter to save Double click to create a prefix | : 2017-10-31T11:32http://iisg.amsterdam/hisco_3/provenance/5e7d5142/ Create a prefix for http://iisg.amsterdam/hisco_3/provenance/5e7d5142/ Hit Enter to save Double click to create a prefix |