change URN datatype from collection to string - according to json-ld context
change URN datatype from collection to string
- according to json-ld context

edoweb/regal-api,jschnasse/regal-api,edoweb/regal-api,jschnasse/regal-api,edoweb/regal-api,jschnasse/regal-api,jschnasse/regal-api,edoweb/regal-api