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    • SchemaValidationListsDependentsAccessi18nChangeLog
    Description
    An agent tracks an object for updates. Related actions: - [FollowAction](http://schema.org/FollowAction): Unlike FollowAction, TrackAction refers to the interest on the location of innanimates objects. - [SubscribeAction](http://schema.org/SubscribeAction): Unlike SubscribeAction, TrackAction refers to the interest on the location of innanimate objects.
  • Objects
    0
    • Properties (24)
    Class propertyActionStatusType
  • actionStatus

    schema.org

    • Indicates the current disposition of the Action.

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    • Class propertyURL
  • additionalType

    schema.org

    • 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.

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    • Class propertyPerson, +1
  • agent

    schema.org

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

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    • Class propertyText
  • alternateName

    schema.org

    • An alias for the item.

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    • Class propertyDeliveryMethod
  • deliveryMethod

    schema.org

    • A sub property of instrument. The method of delivery.

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    • Class propertyText
  • description

    schema.org

    • A description of the item.

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    • Class propertyText
  • disambiguatingDescription

    schema.org

    • 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.

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    • Class propertyTime, +1
  • endTime

    schema.org

    • 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.

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    • Class propertyThing
  • error

    schema.org

    • For failed actions, more information on the cause of the failure.

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    • Class propertyPropertyValue, +1
  • identifier

    schema.org

    • The identifier property represents any kind of identifier for any kind of [Thing](http://schema.org/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](https://schema.org/docs/datamodel.html#identifierBg) for more details.

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    • Class propertyImageObject, +1
  • image

    schema.org

    • An image of the item. This can be a [URL](http://schema.org/URL) or a fully described [ImageObject](http://schema.org/ImageObject).

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    • Class propertyThing
  • instrument

    schema.org

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

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    • Class propertyText, +3
  • location

    schema.org

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

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    • Class propertyURL, +1
  • mainEntityOfPage

    schema.org

    • Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See [background notes](https://schema.org/docs/datamodel.html#mainEntityBackground) for details.

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    • Class propertyText
  • name

    schema.org

    • The name of the item.

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    • Class propertyThing
  • object

    schema.org

    • The object upon which the action is carried out, whose state is kept intact or changed. Also known as the semantic roles patient, affected or undergoer (which change their state) or theme (which doesn't). e.g. John read *a book*.

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    • Class propertyPerson, +1
  • participant

    schema.org

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

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    • Class propertyAction
  • potentialAction

    schema.org

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

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    • Class propertyThing
  • result

    schema.org

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

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    • Class propertyURL
  • sameAs

    schema.org

    • 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.

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    • Class propertyTime, +1
  • startTime

    schema.org

    • 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.

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    • Class propertyEvent, +1
  • subjectOf

    schema.org

    • A CreativeWork or Event about this Thing.

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    • Class propertyEntryPoint
  • target

    schema.org

    • Indicates a target EntryPoint for an Action.

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    • Class propertyURL
  • url

    schema.org

    • URL of the item.

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