Property	Expected Type	Description
Properties from Event
about	Thing	The subject matter of an object. Inverse property: subjectOf
actor	PerformingGroup  or Person	An actor (individual or a group), e.g. in TV, radio, movie, video games etc., or in an event. Actors can be associated with individual items or with a series, episode, clip. Supersedes actors.
aggregateRating	AggregateRating	The overall rating, based on a collection of reviews or ratings, of the item.
attendee	Organization  or Person	A person or organization attending the event. Supersedes attendees.
audience	Audience	An intended audience, i.e. a group for whom something was created. Supersedes serviceAudience.
composer	Organization  or Person	The person or organization who wrote a composition, or who is the composer of a work performed at some event.
contributor	Organization  or Person	A secondary contributor to the CreativeWork or Event.
director	Person	A director of e.g. TV, radio, movie, video gaming etc. content, or of an event. Directors can be associated with individual items or with a series, episode, clip. Supersedes directors.
doorTime	DateTime  or Time	The time admission will commence.
duration	Duration  or QuantitativeValue	The duration of the item (movie, audio recording, event, etc.) in ISO 8601 duration format.
endDate	Date  or DateTime	The end date and time of the item (in ISO 8601 date format).
eventAttendanceMode	EventAttendanceModeEnumeration	The eventAttendanceMode of an event indicates whether it occurs online, offline, or a mix.
eventSchedule	Schedule	Associates an Event with a Schedule. There are circumstances where it is preferable to share a schedule for a series of repeating events rather than data on the individual events themselves. For example, a website or application might prefer to publish a schedule for a weekly gym class rather than provide data on every event. A schedule could be processed by applications to add forthcoming events to a calendar. An Event that is associated with a Schedule using this property should not have startDate or endDate properties. These are instead defined within the associated Schedule, this avoids any ambiguity for clients using the data. The property might have repeated values to specify different schedules, e.g. for different months or seasons.
eventStatus	EventStatusType	An eventStatus of an event represents its status; particularly useful when an event is cancelled or rescheduled.
funder	Organization  or Person	A person or organization that supports (sponsors) something through some kind of financial contribution.
funding	Grant	A Grant that directly or indirectly provide funding or sponsorship for this item. See also ownershipFundingInfo. Inverse property: fundedItem
hasParticipationOffer	Offer	An offer to participate in the event, for example, Call for Proposals, Call for Speakers, or Call for Performers.
hasSponsorshipOffer	Offer	An offer to sponsor the event, for example, Sponsorship Prospectus, Sponsorship Opportunities, or Sponsor Packages.
inLanguage	Language  or Text	The language of the content or performance or used in an action. Please use one of the language codes from the IETF BCP 47 standard. See also availableLanguage. Supersedes language.
isAccessibleForFree	Boolean	A flag to signal that the item, event, or place is accessible for free. Supersedes free.
keywords	DefinedTerm  or Text  or URL	Keywords or tags used to describe some item. Multiple textual entries in a keywords list are typically delimited by commas, or by repeating the property.
location	Place  or PostalAddress  or Text  or VirtualLocation	The location of, for example, where an event is happening, where an organization is located, or where an action takes place.
maximumAttendeeCapacity	Integer	The total number of individuals that may attend an event or venue.
maximumPhysicalAttendeeCapacity	Integer	The maximum physical attendee capacity of an Event whose eventAttendanceMode is OfflineEventAttendanceMode (or the offline aspects, in the case of a MixedEventAttendanceMode).
maximumVirtualAttendeeCapacity	Integer	The maximum virtual attendee capacity of an Event whose eventAttendanceMode is OnlineEventAttendanceMode (or the online aspects, in the case of a MixedEventAttendanceMode).
offers	Demand  or Offer	An offer to provide this item—for example, an offer to sell a product, rent the DVD of a movie, perform a service, or give away tickets to an event. Use businessFunction to indicate the kind of transaction offered, i.e. sell, lease, etc. This property can also be used to describe a Demand. While this property is listed as expected on a number of common types, it can be used in others. In that case, using a second type, such as Product or a subtype of Product, can clarify the nature of the offer. Inverse property: itemOffered
organizer	Organization  or Person	An organizer of an Event.
performer	Organization  or Person	A performer at the event—for example, a presenter, musician, musical group or actor. Supersedes performers.
previousStartDate	Date	Used in conjunction with eventStatus for rescheduled or cancelled events. This property contains the previously scheduled start date. For rescheduled events, the startDate property should be used for the newly scheduled start date. In the (rare) case of an event that has been postponed and rescheduled multiple times, this field may be repeated.
recordedIn	CreativeWork	The CreativeWork that captured all or part of this Event. Inverse property: recordedAt
remainingAttendeeCapacity	Integer	The number of attendee places for an event that remain unallocated.
review	Review	A review of the item. Supersedes reviews.
sponsor	Organization  or Person	A person or organization that supports a thing through a pledge, promise, or financial contribution. E.g. a sponsor of a Medical Study or a corporate sponsor of an event.
startDate	Date  or DateTime	The start date and time of the item (in ISO 8601 date format).
subEvent	Event	An Event that is part of this event. For example, a conference event includes many presentations, each of which is a subEvent of the conference. Supersedes subEvents. Inverse property: superEvent
superEvent	Event	An event that this event is a part of. For example, a collection of individual music performances might each have a music festival as their superEvent. Inverse property: subEvent
translator	Organization  or Person	Organization or person who adapts a creative work to different languages, regional differences and technical requirements of a target market, or that translates during some event.
typicalAgeRange	Text	The typical expected age range, e.g. '7-9', '11-'.
workFeatured	CreativeWork	A work featured in some event, e.g. exhibited in an ExhibitionEvent. Specific subproperties are available for workPerformed (e.g. a play), or a workPresented (a Movie at a ScreeningEvent).
workPerformed	CreativeWork	A work performed in some event, for example a play performed in a TheaterEvent.
Properties from Thing
additionalType	Text  or URL	An additional type for the item, typically used for adding more specific types from external vocabularies in microdata syntax. This is a relationship between something and a class that the thing is in. Typically the value is a URI-identified RDF class, and in this case corresponds to the use of rdf:type in RDF. Text values can be used sparingly, for cases where useful information can be added without their being an appropriate schema to reference. In the case of text values, the class label should follow the schema.org style guide.
alternateName	Text	An alias for the item.
description	Text  or TextObject	A description of the item.
disambiguatingDescription	Text	A sub property of description. A short description of the item used to disambiguate from other, similar items. Information from other properties (in particular, name) may be necessary for the description to be useful for disambiguation.
identifier	PropertyValue  or Text  or URL	The identifier property represents any kind of identifier for any kind of Thing, such as ISBNs, GTIN codes, UUIDs etc. Schema.org provides dedicated properties for representing many of these, either as textual strings or as URL (URI) links. See background notes for more details.
image	ImageObject  or URL	An image of the item. This can be a URL or a fully described ImageObject.
mainEntityOfPage	CreativeWork  or URL	Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details. Inverse property: mainEntity
name	Text	The name of the item.
owner	Organization  or Person	A person or organization who owns this Thing. Inverse property: owns
potentialAction	Action	Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.
sameAs	URL	URL of a reference Web page that unambiguously indicates the item's identity. E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website.
subjectOf	CreativeWork  or Event	A CreativeWork or Event about this Thing. Inverse property: about
url	URL	URL of the item.

Source

https://github.com/schemaorg/schemaorg/issues/2526

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