: expressionhttps://purl.org/midi-ld/h6/ Create a prefix for https://purl.org/midi-ld/h6/ Hit Enter to save Double click to create a prefix | : Expressionhttp://purl.org/vocab/frbr/core# Create a prefix for http://purl.org/vocab/frbr/core# Hit Enter to save Double click to create a prefix |