You can start making use of eventAttendanceMode Though It can be nevertheless pending on schema.org. Here's an example of the celebration which is only occurring online: I can confirm that a migration to JSON-LD from inline RDFa model schema, which validates a hundred% applying their new rich snippet validator Instrument https://shaneaglrt.prublogger.com/31342740/the-basic-principles-of-json-schema-not-null-validation