The name of a node in an established educational framework.

The description of a node in an established educational framework.

The framework to which the resource being described is aligned.

A category of alignment between the learning resource and the framework node. Recommended values include: 'requires', 'textComplexity', 'readingLevel', and 'educationalSubject'.

ICAO identifier for an airport.

IATA identifier for an airline or airport.

The type of boarding policy used by the airline (e.g. zone-based or group-based).

The count of total number of reviews.

The count of total number of ratings.

The item that is being reviewed/rated.

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](https://schema.org/businessFunction) to indicate the kind of transaction offered, i.e. sell, lease, etc. This property can also be used to describe a [Demand](https://schema.org/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.

The number of offers for the product.

The lowest price of all offers available. Usage guidelines: - Use values from 0123456789 (Unicode 'DIGIT ZERO' (U+0030) to 'DIGIT NINE' (U+0039)) rather than superficially similar Unicode symbols. - Use '.' (Unicode 'FULL STOP' (U+002E)) rather than ',' to indicate a decimal point. Avoid using these symbols as a readability separator.

The highest price of all offers available. Usage guidelines: - Use values from 0123456789 (Unicode 'DIGIT ZERO' (U+0030) to 'DIGIT NINE' (U+0039)) rather than superficially similar Unicode symbols. - Use '.' (Unicode 'FULL STOP' (U+002E)) rather than ',' to indicate a decimal point. Avoid using these symbols as a readability separator.

Indicates a target EntryPoint, or url, for an Action.

The startTime of something. For a reserved event or service (e.g. FoodEstablishmentReservation), the time that it is expected to start. For actions that span a period of time, when the action was performed. E.g. John wrote a book from *January* to December. For media, including audio and video, it's the time offset of the start of a clip within a larger file. Note that Event uses startDate/endDate instead of startTime/endTime, even when describing dates with times. This situation may be clarified in future revisions.

The result produced in the action. E.g. John wrote *a book*.

Other co-agents that participated in the action indirectly. E.g. John wrote a book with *Steve*.

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

The object that helped the agent perform the action. E.g. John wrote a book with *a pen*.

For failed actions, more information on the cause of the failure. Consider using the Error type.

The endTime of something. For a reserved event or service (e.g. FoodEstablishmentReservation), the time that it is expected to end. For actions that span a period of time, when the action was performed. E.g. John wrote a book from January to *December*. For media, including audio and video, it's the time offset of the end of a clip within a larger file. Note that Event uses startDate/endDate instead of startTime/endTime, even when describing dates with times. This situation may be clarified in future revisions.

The direct performer or driver of the action (animate or inanimate). E.g. *John* wrote a book.

Indicates the current disposition of the Action.