You can start using eventAttendanceMode Though It can be still pending on schema.org. This is an example of the event which is only occurring online: Полное руководство по работе со структурированными данными Rakuten has located that users devote 1.5x far more time on pages that implemented structured information than on https://bookmarknap.com/story9781427/not-known-details-about-markup-schema-json-schema