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A 3D model represents some kind of 3D content, which may have [encoding](http://schema.org/encoding)s in one or more [MediaObject](http://schema.org/MediaObject)s. Many 3D formats are available (e.g. see [Wikipedia](https://en.wikipedia.org/wiki/Category:3D_graphics_file_formats)); specific encoding formats can be represented using the [encodingFormat](http://schema.org/encodingFormat) property applied to the relevant [MediaObject](http://schema.org/MediaObject). For thecase of a single file published after Zip compression, the convention of appending '+zip' to the [encodingFormat](http://schema.org/encodingFormat) can be used. Geospatial, AR/VR, artistic/animation, gaming, engineering and scientific content can all be represented using [3DModel](http://schema.org/3DModel).

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Web page type: About page.

The act of committing to/adopting an object. Related actions: - [RejectAction](http://schema.org/RejectAction): The antonym of AcceptAction.

An accommodation is a place that can accommodate human beings, e.g. a hotel room, a camping pitch, or a meeting room. Many accommodations are for overnight stays, but this is not a mandatory requirement.For more specific types of accommodations not defined in schema.org, one can use additionalType with external vocabularies. See also the [dedicated document on the use of schema.org for marking up hotels and other forms of accommodations](https://schema.org/docs/hotels.html).

Accountancy business. As a [LocalBusiness](http://schema.org/LocalBusiness) it can be described as a [provider](http://schema.org/provider) of one or more [Service](http://schema.org/Service)(s).

The act of accomplishing something via previous efforts. It is an instantaneous action rather than an ongoing process.

An action performed by a direct agent and indirect participants upon a direct object. Optionally happens at a location with the help of an inanimate instrument. The execution of the action may produce a result. Specific action sub-type documentation specifies the exact expectation of each argument/role. See also [blog post](https://blog.schema.org/2014/04/16/announcing-schema-org-actions/) and [Actions overview document](http://schema.org/docs/actions.html).

System Action: base class for domain actions that are not dedicated Create/Update/Delete/Replace audit types (e.g. BookmarkAction, ReportAction).

A set of requirements that a must be fulfilled in order to perform an Action.

The status of an Action.

The act of starting or activating a device or application (e.g. starting a timer or turning on a flashlight).

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The act of editing by adding an object to a collection.

System audit Action: a Thing or PropertyValue was added.

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A geographical region, typically under the jurisdiction of a particular government.

An adult entertainment establishment.

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An [Article](http://schema.org/Article) that an external entity has paid to place or to produce to its specifications. Includes [advertorials](https://en.wikipedia.org/wiki/Advertorial), sponsored content, native advertising and other paid content.

When a single product is associated with multiple offers (for example, the same pair of shoes is offered by different merchants), then AggregateOffer can be used. Note: AggregateOffers are normally expected to associate multiple offers that all share the same defined [businessFunction](http://schema.org/businessFunction) value, or default to http://purl.org/goodrelations/v1#Sell if businessFunction is not explicitly defined.

The average rating based on multiple ratings or reviews.

The act of expressing a consistency of opinion with the object. An agent agrees to/about an object (a proposition, topic or theme) with participants.

An organization that provides flights for passengers.

An airport.

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An intangible item that describes an alignment between a learning resource and a node in an educational framework.

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The act of organizing tasks/objects/events by associating resources to it.

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A radio channel that uses AM.

An amusement park.

An AnalysisNewsArticle is a [NewsArticle](http://schema.org/NewsArticle) that, while based on factual reporting, incorporates the expertise of the author/producer, offering interpretations and conclusions.

Any part of the human body, typically a component of an anatomical system. Organs, tissues, and cells are all anatomical structures.

An anatomical system is a group of anatomical structures that work together to perform a certain task. Anatomical systems, such as organ systems, are one organizing principle of anatomy, and can includes circulatory, digestive, endocrine, integumentary, immune, lymphatic, muscular, nervous, reproductive, respiratory, skeletal, urinary, vestibular, and other systems.

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Animal shelter.

An answer offered to a question; perhaps correct, perhaps opinionated or wrong.

An apartment (in American English) or flat (in British English) is a self-contained housing unit (a type of residential real estate) that occupies only part of a building (Source: Wikipedia, the free encyclopedia, see [http://en.wikipedia.org/wiki/Apartment](http://en.wikipedia.org/wiki/Apartment)).

Residence type: Apartment complex.

Reference documentation for application programming interfaces (APIs).