Source: Schema.org v30.1 vocabulary. Official additionalNumberOfGuests property definition.
What does additionalNumberOfGuests mean?
If responding yes, the number of guests who will attend in addition to the invitee.
Used on types (domainIncludes)
Expected value types (rangeIncludes)
Schema.org domainIncludes and rangeIncludes are descriptive guidance, not strict validation prohibitions. Check the official reference for updates.
Related reference
Browse all Schema.org types and properties · Google feature support status