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The subject matter of the content.

Participant-facing notes that explain how accessibility needs are or can be supported for a listing, event, course, or facility.

Accessibility categories supported by a listing, course, event, facility, or other marketplace opportunity.

The physical activity, sport, or play type associated with an event, course, facility, or listing.

An actor, 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.

Additional eligibility or admission restriction text that must be shown before booking when the restriction is not already covered by structured age or gender fields.

A physical place associated with a virtual listing, event, or course, such as the venue where it would normally occur or where it is broadcast from.

The recommended or targeted age range for a listing, event, course, or offer. This is suitability guidance, not an enforced booking or attendance restriction.

The enforced attendee age requirement for a listing, event, course, or offer. This must be displayed before booking when present.

The overall rating, based on a collection of reviews or ratings, of the item.

A person or organization attending the event.

The actual number of people who attended an event. This is runtime attendance data, not provider-authored listing configuration.

Operational instructions a participant should know before attending or using a listing, such as what to bring, when to arrive, how to check in, or other practical guidance.

A person attending the event.

An intended audience, i.e. a group for whom something was created.

The person or organization who wrote a composition, or who is the composer of a work performed at some event.

A structured contact route for an entity or contextual assignment, such as booking support, accessibility support, an event-day phone line, or an instructor contact.

A secondary contributor to the CreativeWork or Event.

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.

When admission, check-in, doors, or event access begins before the event start time.

The duration of the item (movie, audio recording, event, etc.) in ISO 8601 date format.

The end date and time of the item (in ISO 8601 date format).

An approximate duration range for an event, course, facility use, or listing when the exact duration is not fixed.

Whether an event or course is attended in person, online, or through a mix of online and in-person participation.

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.

The lifecycle state of a concrete event or generated availability occurrence, especially when an occurrence is cancelled, rescheduled, or unavailable.

Whether a facility or event takes place indoors or outdoors.

Sanitized HTML rendering of rich listing description content, used for OpenActive import/export and other formatted-description projections.

A person or organization that supports (sponsors) something through some kind of financial contribution.

A Grant that directly or indirectly provide funding or sponsorship for this item. See also ownershipFundingInfo.

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.

A flag to signal that the item, event, or place is accessible for free.

Whether the listing, event, course, or facility use is led or supported by a coach, instructor, leader, or similar personnel role.

Whether interactive participation is preferred or expected for a virtual listing, instead of passive viewing only.

Whether an event or listing should be presented as a dense set of time slots rather than a small set of individually named sessions.

Whether coaching or instruction for the listing is delivered virtually. This is only relevant when the listing is coached.

Whether the facility or event setup is wheelchair accessible. This is a derived projection from amenity and accessibility data, not a separate source-of-truth field.

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.

The person who leads an event, course, facility use, or listing experience, such as a coach, instructor, guide, host, or facilitator.

The location of, for example, where an event is happening, where an organization is located, or where an action takes place.

The maximum number of people who can attend or be booked into an event, venue, or availability plan.

The maximum physical attendee capacity of an Event whose eventAttendanceMode is OfflineEventAttendanceMode (or the offline aspects, in the case of a MixedEventAttendanceMode).

The maximum physical attendee capacity of an Event whose eventAttendanceMode is OnlineEventAttendanceMode (or the online aspects, in the case of a MixedEventAttendanceMode).

Human-readable guidance for the exact place participants should meet within, near, or before reaching the listing location.

The offer or set of offers available for an event, facility use, availability slot, or other item. In TMC this is projected from the parent listing and its offer options, with occurrence-level overrides when a slot has different price or availability.

The person or organization responsible for organizing an event. In TMC, this usually projects from the listing provider unless an explicit organizer override is introduced later.

Whether participants are required, allowed, or not expected to bring their own equipment for the listing, event, course, or facility use.

A person or organization performing, presenting, or appearing as part of an event.

The main performer or performers of the event—for example, a presenter, musician, or actor.

People assigned to deliver, lead, present, perform, officiate, host, or support a listing or operational context.

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.

A named programme, format, or branded activity model that an event, course, facility use, or listing follows, such as a recognized class format, league programme, or provider-run activity series.

The CreativeWork that captured all or part of this Event.

The number of registrations or bookings that express intent to attend an event or concrete availability occurrence.

The number of attendee places that remain available for an event or concrete availability slot.

Audiences defined by a person's gender. When blank, the listing is not gender specific and is open to all genders.

The maximum age allowed for an audience or participant when the listing has an enforced age restriction.

The minimum age allowed for an audience or participant when the listing has an enforced age restriction.

Reviews of the item, listing, place, organization, or offer.

Route guides attached to a listing or offer option, such as race courses, trails, walking routes, or measured paths.

The skill or experience level a listing, event, course, play activity, or user play skill profile is designed for or associated with. For listings, events, and courses, this describes the expected participant level; for a PlaySkillProfile, it describes the user's declared current level for a specific play type.

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.

The internal sports or activity location for an event, facility, or concrete availability slot, such as Court 1, Pitch A, Studio 2, or a specific playing area.

The start date and time of the item (in ISO 8601 date format).

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.

Events that are a part of this event. For example, a conference event includes many presentations, each subEvents of the conference.

Maximum recommended age in years for the audience or user.

Minimum recommended age in years for the audience or user.

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.

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.

The typical expected age range, e.g. '7-9', '11-'.

The virtual or online location through which participants can access, join, or attend a listing, event, or course.

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).

A work performed in some event, for example a play performed in a TheaterEvent.

Participant-facing notes that explain how accessibility needs are or can be supported for a listing, event, course, or facility.

Accessibility categories supported by a listing, course, event, facility, or other marketplace opportunity.

The physical activity, sport, or play type associated with an event, course, facility, or listing.

An additional offer that can only be obtained in combination with the first base offer (e.g. supplements and extensions that are available for a surcharge).

Attendance records captured for booked slots, listings, transaction items, or availability slots.

Operational instructions a participant should know before attending or using a listing, such as what to bring, when to arrive, how to check in, or other practical guidance.

The date and time after which the offered item, space, service, reward, or benefit is no longer available for use, redemption, access, pickup, or fulfillment.

The availability authoring rules attached to a listing, used for schedules, recurrence, exceptions, capacity defaults, and plan-level overrides.

The schedule model used to represent a listing's availability, such as a single date/time, recurring time slots, day-based availability, work hours, or no schedule.

A derived availability summary stored on the listing for fast search filters, such as days of week, time of day, next start time, and generation window.

Concrete bookable availability occurrences generated or authored from a listing or availability plan.

The date and time when the offered item, space, service, reward, or benefit becomes available for use, redemption, access, pickup, or fulfillment.

The current availability state of the offer, such as in stock, sold out, preorder, or limited availability.

Confirmed booked slots or reservation records created against a concrete availability slot.

The external URL used when a listing's booking, registration, purchase, donation, application, or reward claim is completed outside the platform.

OpenActive booking-flow features required to accept the offer, such as attendee details, intake forms, approval, negotiation, or message exchange.

The product journey shell used by the booking UI, such as registration, reservation, donation, application, claim, or purchase.

Whether accepting the offer requires, optionally supports, or does not support booking in advance.

Whether accepting the offer requires, optionally supports, or does not support payment in advance.

The amount picker shape used by the booking UI, such as a fixed amount, selectable price options, a customer-defined amount, price options with a custom amount, or free.

Where and how the booking resolves: directly on the platform, by request or proposal, or externally.

The number of booking units included in the default purchasable unit, interpreted with bookingUnitType.

The unit a customer buys or books against an offer, such as minutes, hours, days, nights, or a custom unit.

Runtime cancellation audit events attached to a listing, transaction item, or booked slot.

Structured cancellation rules for the listing or offer before a customer books or purchases it.

A structured contact route for an entity or contextual assignment, such as booking support, accessibility support, an event-day phone line, or an instructor contact.

Canonical rich editor JSON state for a listing description. This is the editable structured content source used to derive plain text and formatted HTML outputs.

The entitlement a customer must hold to qualify for an offer or offer option, such as member-only access or member-only pricing.

An approximate duration range for an event, course, facility use, or listing when the exact duration is not fixed.

Sanitized HTML rendering of rich listing description content, used for OpenActive import/export and other formatted-description projections.

The current approximate inventory level for the offer, such as remaining seats, units, passes, or simple bookable capacity.

How the platform manages inventory for an offer, such as unlimited availability, manual control, tracked inventory, or backorder behavior.

Whether an event or listing should be presented as a dense set of time slots rather than a small set of individually named sessions.

The person who leads an event, course, facility use, or listing experience, such as a coach, instructor, guide, host, or facilitator.

Listing-level metrics rollup for registration, attendance, booking, cancellation, no-show, and waitlist counters.

Per-occurrence metrics rollups for concrete availability slots or generated occurrence keys.

Refinement classes that describe the specific shape of a listing below its broad listing type.

The broad category of offer represented by a listing.

The location of, for example, where an event is happening, where an organization is located, or where an action takes place.

A marketplace associated with the entity.

Human-readable guidance for the exact place participants should meet within, near, or before reaching the listing location.

The scoped micro-marketplace or partner marketplace experience that owns, curates, or distributes the listing within a parent marketplace.

The moderation result attached to an entity, describing the aggregate outcome and individual checks used to determine whether the entity can proceed or remain public.

Checkout-facing options attached to an offer, including selectable price options, optional add-ons, and required charges.

People assigned to deliver, lead, present, perform, officiate, host, or support a listing or operational context.

The types of sport, active recreation, and fitness associated with the entity.

Scoped policy records that apply policy documents to a marketplace, provider, or listing.

The price of an offer or offer option before discounts or downstream transaction adjustments are applied.

The currency of the price.

Whether the customer can choose the amount they pay for the offer, such as a donation or pay-what-you-can booking.

The date after which the stated price is no longer guaranteed. The offer may still exist, but the price may change.

A named programme, format, or branded activity model that an event, course, facility use, or listing follows, such as a recognized class format, league programme, or provider-run activity series.

The service provider, service operator, or service performer; the goods producer. Another party (a seller) may offer those services or goods on behalf of the provider. A provider may also serve as the seller.

The publication lifecycle state of a listing, used to control listing visibility and publishing workflow.

Route guides attached to a listing or offer option, such as race courses, trails, walking routes, or measured paths.

A human-readable routing identifier used in platform URLs and path-based lookup.

The IANA time zone used to interpret dates, times, schedules, and generated availability occurrences.

The date and time when users can begin accepting the offer, such as booking, purchasing, claiming, donating, registering, or applying.

The relative duration before an occurrence starts when the offer becomes valid, such as opening registration 30 days before each session.

The date and time after which users can no longer accept the offer, such as the close of registration, claiming, booking, donating, purchasing, or applying.

The relative duration before an occurrence starts after which the offer is no longer valid, such as closing registration 24 hours before each session.

Inventory-bearing options scoped to a listing variant, used when a variant needs its own selectable stock or capacity choices.

Connects a child listing to the parent listing it refines when the child is itself a marketplace offer variant with its own listing lifecycle, such as a product variant, package tier, or fundraiser child campaign. Do not use this for named facility resources like courts, rooms, lanes, pitches, or studios; use facilityResources instead.

Child listing variants that refine a parent listing into purchasable, bookable, or otherwise selectable versions of the same offer. Named facility resources such as courts, rooms, lanes, pitches, or studios belong in facilityResources instead.

Verification records attached to an account, provider, or listing. These are the actual workflow instances and outcomes, separate from lifecycle status, generic verification methods, moderation, and badge display rules.

The access and discovery scope for a listing.

The public website and platform profiles associated with an account, marketplace, listing, or related platform entity.

The full website URL associated with an item or WebProfiles value.

The payment method(s) accepted by seller for this offer.

An additional offer that can only be obtained in combination with the first base offer (e.g. supplements and extensions that are available for a surcharge).

The amount of time that is required between accepting the offer and the actual usage of the resource or service.

The overall rating, based on a collection of reviews or ratings, of the item.

The geographic area where a service or offered item is provided.

An Amazon Standard Identification Number (ASIN) is a 10-character alphanumeric unique identifier assigned by Amazon.com and its partners for product identification within the Amazon organization (summary from Wikipedia's article).
Note also that this is a definition for how to include ASINs in Schema.org data, and not a definition of ASINs in general - see documentation from Amazon for authoritative details. ASINs are most commonly encoded as text strings, but the asin property supports URL/URI as potential values too.

The date and time after which the offered item, space, service, reward, or benefit is no longer available for use, redemption, access, pickup, or fulfillment.

The date and time when the offered item, space, service, reward, or benefit becomes available for use, redemption, access, pickup, or fulfillment.

The current availability state of the offer, such as in stock, sold out, preorder, or limited availability.

The place(s) from which the offer can be obtained (e.g. store locations).

The delivery method(s) available for this offer.

The external URL used when a listing's booking, registration, purchase, donation, application, or reward claim is completed outside the platform.

OpenActive booking-flow features required to accept the offer, such as attendee details, intake forms, approval, negotiation, or message exchange.

The product journey shell used by the booking UI, such as registration, reservation, donation, application, claim, or purchase.

Whether accepting the offer requires, optionally supports, or does not support booking in advance.

Whether accepting the offer requires, optionally supports, or does not support payment in advance.

The amount picker shape used by the booking UI, such as a fixed amount, selectable price options, a customer-defined amount, price options with a custom amount, or free.

Where and how the booking resolves: directly on the platform, by request or proposal, or externally.

The number of booking units included in the default purchasable unit, interpreted with bookingUnitType.

The unit a customer buys or books against an offer, such as minutes, hours, days, nights, or a custom unit.

The transactional intent of an offer, such as selling, leasing, providing a service, giving something away, or raising funds.

Structured cancellation rules for the listing or offer before a customer books or purchases it.

A category for the item. Greater signs or slashes can be used to informally indicate a category hierarchy.

A URL template (RFC 6570) for a checkout page for an offer. This approach allows merchants to specify a URL for online checkout of the offered product, by interpolating parameters such as the logged in user ID, product ID, quantity, discount code etc. Parameter naming and standardization are not specified here.

The typical delay between the receipt of the order and the goods either leaving the warehouse or being prepared for pickup, in case the delivery method is on site pickup.

The type(s) of customers for which the given offer is valid.

The duration for which the given offer is valid.

The entitlement a customer must hold to qualify for an offer or offer option, such as member-only access or member-only pricing.

The interval and unit of measurement of ordering quantities for which the offer or price specification is valid. This allows e.g. specifying that a certain freight charge is valid only for a certain quantity.

The ISO 3166-1 (ISO 3166-1 alpha-2) or ISO 3166-2 code, the place, or the GeoShape for the geo-political region(s) for which the offer or delivery charge specification is valid.\n\nSee also ineligibleRegion.

The transaction volume, in a monetary unit, for which the offer or price specification is valid, e.g. for indicating a minimal purchasing volume, to express free shipping above a certain order volume, or to limit the acceptance of credit cards to purchases to a certain minimal amount.

A Global Trade Item Number (GTIN). GTINs identify trade items, including products and services, using numeric identification codes.
The GS1 digital link specifications express GTINs as URLs (URIs, IRIs, etc.). Details including regular expression examples can be found in, Section 6 of the GS1 URI Syntax specification; see also schema.org tracking issue for schema.org-specific discussion. A correct gtin value should be a valid GTIN, which means that it should be an all-numeric string of either 8, 12, 13 or 14 digits, or a "GS1 Digital Link" URL based on such a string. The numeric component should also have a valid GS1 check digit and meet the other rules for valid GTINs. See also GS1's GTIN Summary and Wikipedia for more details. Left-padding of the gtin values is not required or encouraged. The gtin property generalizes the earlier gtin8, gtin12, gtin13, and gtin14 properties.
Note also that this is a definition for how to include GTINs in Schema.org data, and not a definition of GTINs in general - see the GS1 documentation for authoritative details.

The GTIN-12 code of the product, or the product to which the offer refers. The GTIN-12 is the 12-digit GS1 Identification Key composed of a U.P.C. Company Prefix, Item Reference, and Check Digit used to identify trade items. See GS1 GTIN Summary for more details.

The GTIN-13 code of the product, or the product to which the offer refers. This is equivalent to 13-digit ISBN codes and EAN UCC-13. Former 12-digit UPC codes can be converted into a GTIN-13 code by simply adding a preceding zero. See GS1 GTIN Summary for more details.

The GTIN-14 code of the product, or the product to which the offer refers. See GS1 GTIN Summary for more details.

The GTIN-8 code of the product, or the product to which the offer refers. This code is also known as EAN/UCC-8 or 8-digit EAN. See GS1 GTIN Summary for more details.

Used to tag an item to be intended or suitable for consumption or use by adults only.

A product measurement, for example the inseam of pants, the wheel size of a bicycle, or the gauge of a screw. Usually an exact measurement, but can also be a range of measurements for adjustable products, for example belts and ski bindings.

Specifies a MerchantReturnPolicy that may be applicable.

This links to a node or nodes indicating the exact quantity of the products included in an Offer or ProductCollection.

The ISO 3166-1 (ISO 3166-1 alpha-2) or ISO 3166-2 code, the place, or the GeoShape for the geo-political region(s) for which the offer or delivery charge specification is not valid, e.g. a region where the transaction is not allowed.\n\nSee also eligibleRegion.

The current approximate inventory level for the offer, such as remaining seats, units, passes, or simple bookable capacity.

Indicates whether this content is family friendly.

A predefined value from OfferItemCondition specifying the condition of the product or service, or the products or services included in the offer. Also used for product return policies to specify the condition of products accepted for returns.

An item being offered (or demanded). The transactional nature of the offer or demand is documented using businessFunction, e.g. sell, lease etc. While several common expected types are listed explicitly in this definition, others can be used. Using a second type, such as Product or a subtype of Product, can clarify the nature of the offer.

Length of the lease for some Accommodation, either particular to some Offer or in some cases intrinsic to the property.

The mobileUrl property is provided for specific situations in which data consumers need to determine whether one of several provided URLs is a dedicated 'mobile site'.
To discourage over-use, and reflecting intial usecases, the property is expected only on Product and Offer, rather than Thing. The general trend in web technology is towards responsive design in which content can be flexibly adapted to a wide range of browsing environments. Pages and sites referenced with the long-established url property should ideally also be usable on a wide variety of devices, including mobile phones. In most cases, it would be pointless and counter productive to attempt to update all url markup to use mobileUrl for more mobile-oriented pages. The property is intended for the case when items (primarily Product and Offer) have extra URLs hosted on an additional "mobile site" alongside the main one. It should not be taken as an endorsement of this publication style.

The Manufacturer Part Number (MPN) of the product, or the product to which the offer refers.

A pointer to the organization or person making the offer.

Checkout-facing options attached to an offer, including selectable price options, optional add-ons, and required charges.

The price of an offer or offer option before discounts or downstream transaction adjustments are applied.

The currency of the price.

Whether the customer can choose the amount they pay for the offer, such as a donation or pay-what-you-can booking.

One or more detailed price specifications, indicating the unit price and delivery or payment charges.

The date after which the stated price is no longer guaranteed. The offer may still exist, but the price may change.

Reviews of the item, listing, place, organization, or offer.

Review of the item.

An entity which offers (sells / leases / lends / loans) the services / goods. A seller may also be a provider.

The serial number or any alphanumeric identifier of a particular product. When attached to an offer, it is a shortcut for the serial number of the product included in the offer.

Indicates information about the shipping policies and options associated with an Offer.

The Stock Keeping Unit (SKU), i.e. a merchant-specific identifier for a product or service, or the product to which the offer refers.

The date and time when users can begin accepting the offer, such as booking, purchasing, claiming, donating, registering, or applying.

The relative duration before an occurrence starts when the offer becomes valid, such as opening registration 30 days before each session.

The date and time after which users can no longer accept the offer, such as the close of registration, claiming, booking, donating, purchasing, or applying.

The relative duration before an occurrence starts after which the offer is no longer valid, such as closing registration 24 hours before each session.

The warranty promise(s) included in the offer.

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. In RDFa syntax, it is better to use the native RDFa syntax - the 'typeof' attribute - for multiple types. Schema.org tools may have only weaker understanding of extra types, in particular those defined externally.

An alias for the item.

A description of the item.

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.

The identifier property represents any kind of identifier for any kind of Thing, such as ISBNs, GTIN codes, UUIDs etc.

An image of the item. This can be a URL or a fully described ImageObject.

Type to which this subject belongs. Use for membership in a value set (Enumeration), not inheritance. Example: K2 instanceOf mountain; volcano subClassOf mountain.

Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details.

The name of the item.

Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.

Associates a term with another vocabulary term that is useful to understand alongside it, without claiming hierarchy or equivalence.

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.

A CreativeWork or Event about this Thing.

URL of the item.