The subject matter of an object.

An abstract is a short description that summarizes a [CreativeWork](https://schema.org/CreativeWork).

Indicates that the resource is compatible with the referenced accessibility API. Values should be drawn from the [approved vocabulary](https://www.w3.org/2021/a11y-discov-vocab/latest/#accessibilityAPI-vocabulary).

Identifies input methods that are sufficient to fully control the described resource. Values should be drawn from the [approved vocabulary](https://www.w3.org/2021/a11y-discov-vocab/latest/#accessibilityControl-vocabulary).

Content features of the resource, such as accessible media, alternatives and supported enhancements for accessibility. Values should be drawn from the [approved vocabulary](https://www.w3.org/2021/a11y-discov-vocab/latest/#accessibilityFeature-vocabulary).

A characteristic of the described resource that is physiologically dangerous to some users. Related to WCAG 2.0 guideline 2.3. Values should be drawn from the [approved vocabulary](https://www.w3.org/2021/a11y-discov-vocab/latest/#accessibilityHazard-vocabulary).

A human-readable summary of specific accessibility features or deficiencies, consistent with the other accessibility metadata but expressing subtleties such as "short descriptions are present but long descriptions will be needed for non-visual users" or "short descriptions are present and no long descriptions are needed".

The human sensory perceptual system or cognitive faculty through which a person may process or perceive the intellectual content of a resource, not including any adaptations of the content (e.g., text alternatives for images). Values should be drawn from the [approved vocabulary](https://www.w3.org/2021/a11y-discov-vocab/latest/#accessMode-vocabulary).

A list of single or combined access modes that are sufficient to understand all the intellectual content of a resource, including any adaptations. Values should be drawn from the [approved vocabulary](https://www.w3.org/2021/a11y-discov-vocab/latest/#accessModeSufficient-vocabulary).

Specifies the Person that is legally accountable for the CreativeWork.

Indicates a page documenting how licenses can be purchased or otherwise acquired, for the current item.

A property-value pair representing an additional characteristic of the entity, e.g. a product feature or another characteristic for which there is no matching property in schema.org.<br/><br/> Note: Publishers should be aware that applications designed to use specific schema.org properties (e.g. https://schema.org/width, https://schema.org/color, https://schema.org/gtin13, ...) will typically expect such data to be provided using those properties, rather than using the generic property/value mechanism.

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](https://schema.org/docs/styleguide.html).

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

An alias for the item.

A secondary title of the CreativeWork.

Indicates a page or other link involved in archival of a [CreativeWork](https://schema.org/CreativeWork). In the case of [MediaReview](https://schema.org/MediaReview), the items in a [MediaReviewItem](https://schema.org/MediaReviewItem) may often become inaccessible, but be archived by archival, journalistic, activist, or law enforcement organizations. In such cases, the referenced page may not directly publish the content.

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](https://en.wikipedia.org/wiki/Amazon_Standard_Identification_Number)'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 item being described is intended to assess the competency or learning outcome defined by the referenced term.

A media object that encodes this CreativeWork. This property is a synonym for encoding.

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

An embedded audio object.

The author of this content or rating. Please note that author is special in that HTML 5 provides a special mechanism for indicating authorship via the rel tag. That is equivalent to this and may be used interchangeably.

An award won by or for this item.

Awards won by or for this item.

The brand(s) associated with a product or service, or the brand(s) maintained by an organization or business person.

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

Fictional person connected with a creative work.

A citation or reference to another creative work, such as another publication, web page, scholarly article, etc.

The number of items in the [Collection](https://schema.org/Collection).

The color of the product.

A color swatch image, visualizing the color of a [Product](https://schema.org/Product). Should match the textual description specified in the [color](https://schema.org/color) property. This can be a URL or a fully described ImageObject.

Comments, typically from users.

The number of comments this CreativeWork (e.g. Article, Question or Answer) has received. This is most applicable to works published in Web sites with commenting system; additional comments may exist elsewhere.

Conditions that affect the availability of, or method(s) of access to, an item. Typically used for real world items such as an [ArchiveComponent](https://schema.org/ArchiveComponent) held by an [ArchiveOrganization](https://schema.org/ArchiveOrganization). This property is not suitable for use as a general Web access control mechanism. It is expressed only in natural language. For example "Available by appointment from the Reading Room" or "Accessible only from logged-in accounts ".

The location depicted or described in the content. For example, the location in a photograph or painting.

Official rating of a piece of content—for example, 'MPAA PG-13'.

The specific time described by a creative work, for works (e.g. articles, video objects etc.) that emphasise a particular moment within an Event.

A secondary contributor to the CreativeWork or Event.

The party holding the legal copyright to the CreativeWork.

Text of a notice appropriate for describing the copyright aspects of this Creative Work, ideally indicating the owner of the copyright for the Work.

The year during which the claimed copyright for the CreativeWork was first asserted.

Indicates a correction to a [CreativeWork](https://schema.org/CreativeWork), either via a [CorrectionComment](https://schema.org/CorrectionComment), textually or in another document.

The place where the product was assembled.

The place where the item (typically [Product](https://schema.org/Product)) was last processed and tested before importation.

The country of origin of something, including products as well as creative works such as movie and TV content. In the case of TV and movie, this would be the country of the principle offices of the production company or individual responsible for the movie. For other kinds of [CreativeWork](https://schema.org/CreativeWork) it is difficult to provide fully general guidance, and properties such as [contentLocation](https://schema.org/contentLocation) and [locationCreated](https://schema.org/locationCreated) may be more applicable. In the case of products, the country of origin of the product. The exact interpretation of this may vary by context and product type, and cannot be fully enumerated here.

The status of a creative work in terms of its stage in a lifecycle. Example terms include Incomplete, Draft, Published, Obsolete. Some organizations define a set of terms for the stages of their publication lifecycle.

The creator/author of this CreativeWork. This is the same as the Author property for CreativeWork.

Text that can be used to credit person(s) and/or organization(s) associated with a published Creative Work.

The date on which the CreativeWork was created or the item was added to a DataFeed.

The date on which the CreativeWork was most recently modified or when the item's entry was modified within a DataFeed.

Date of first publication or broadcast. For example the date a [CreativeWork](https://schema.org/CreativeWork) was broadcast or a [Certification](https://schema.org/Certification) was issued.

The depth of the item.

A description of the item.

Indicates an IPTCDigitalSourceEnumeration code indicating the nature of the digital source(s) for some [CreativeWork](https://schema.org/CreativeWork).

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.

A link to the page containing the comments of the CreativeWork.

The location at which an item can be viewed or experienced in-person.

An [EIDR](https://eidr.org/) (Entertainment Identifier Registry) [identifier](https://schema.org/identifier) representing a specific edit / edition for a work of film or television. For example, the motion picture known as "Ghostbusters" whose [titleEIDR](https://schema.org/titleEIDR) is "10.5240/7EC7-228A-510A-053E-CBB8-J" has several edits, e.g. "10.5240/1F2A-E1C5-680A-14C6-E76B-I" and "10.5240/8A35-3BEE-6497-5D12-9E4F-3". Since schema.org types like [Movie](https://schema.org/Movie) and [TVEpisode](https://schema.org/TVEpisode) can be used for both works and their multiple expressions, it is possible to use [titleEIDR](https://schema.org/titleEIDR) alone (for a general description), or alongside [editEIDR](https://schema.org/editEIDR) for a more edit-specific description.

Specifies the Person who edited the CreativeWork.

An alignment to an established educational framework. This property should not be used where the nature of the alignment can be described using a simple property, for example to express that a resource [teaches](https://schema.org/teaches) or [assesses](https://schema.org/assesses) a competency.

The level in terms of progression through an educational or training context. Examples of educational levels include 'beginner', 'intermediate' or 'advanced', and formal sets of level indicators.

The purpose of a work in the context of education; for example, 'assignment', 'group work'.

A media object that encodes this CreativeWork. This property is a synonym for associatedMedia.

Media type typically expressed using a MIME format (see [IANA site](http://www.iana.org/assignments/media-types/media-types.xhtml) and [MDN reference](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types)), e.g. application/zip for a SoftwareApplication binary, audio/mpeg for .mp3 etc. In cases where a [CreativeWork](https://schema.org/CreativeWork) has several media type representations, [encoding](https://schema.org/encoding) can be used to indicate each [MediaObject](https://schema.org/MediaObject) alongside particular [encodingFormat](https://schema.org/encodingFormat) information. Unregistered or niche encoding and file formats can be indicated instead via the most appropriate URL, e.g. defining Web page or a Wikipedia/Wikidata entry.

A media object that encodes this CreativeWork.

A creative work that this work is an example/instance/realization/derivation of.

Date the content expires and is no longer useful or available. For example a [VideoObject](https://schema.org/VideoObject) or [NewsArticle](https://schema.org/NewsArticle) whose availability or relevance is time-limited, a [ClaimReview](https://schema.org/ClaimReview) fact check whose publisher wants to indicate that it may no longer be relevant (or helpful to highlight) after some date, or a [Certification](https://schema.org/Certification) the validity has expired.

Media type, typically MIME format (see [IANA site](http://www.iana.org/assignments/media-types/media-types.xhtml)) of the content, e.g. application/zip of a SoftwareApplication binary. In cases where a CreativeWork has several media type representations, 'encoding' can be used to indicate each MediaObject alongside particular fileFormat information. Unregistered or niche file formats can be indicated instead via the most appropriate URL, e.g. defining Web page or a Wikipedia entry.

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

A [Grant](https://schema.org/Grant) that directly or indirectly provide funding or sponsorship for this item. See also [ownershipFundingInfo](https://schema.org/ownershipFundingInfo).

Genre of the creative work, broadcast channel or group.

A Global Trade Item Number ([GTIN](https://www.gs1.org/standards/id-keys/gtin)). GTINs identify trade items, including products and services, using numeric identification codes. A correct [gtin](https://schema.org/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](https://www.gs1.org/services/check-digit-calculator) and meet the other rules for valid GTINs. See also [GS1's GTIN Summary](http://www.gs1.org/barcodes/technical/idkeys/gtin) and [Wikipedia](https://en.wikipedia.org/wiki/Global_Trade_Item_Number) for more details. Left-padding of the gtin values is not required or encouraged. The [gtin](https://schema.org/gtin) property generalizes the earlier [gtin8](https://schema.org/gtin8), [gtin12](https://schema.org/gtin12), [gtin13](https://schema.org/gtin13), and [gtin14](https://schema.org/gtin14) properties. The GS1 [digital link specifications](https://www.gs1.org/standards/Digital-Link/) expresses GTINs as URLs (URIs, IRIs, etc.). Digital Links should be populated into the [hasGS1DigitalLink](https://schema.org/hasGS1DigitalLink) attribute. 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](http://www.gs1.org/barcodes/technical/idkeys/gtin) 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](http://www.gs1.org/barcodes/technical/idkeys/gtin) for more details.

The GTIN-14 code of the product, or the product to which the offer refers. See [GS1 GTIN Summary](http://www.gs1.org/barcodes/technical/idkeys/gtin) 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](http://www.gs1.org/barcodes/technical/idkeys/gtin) for more details.

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

Certification information about a product, organization, service, place, or person.

Defines the energy efficiency Category (also known as "class" or "rating") for a product according to an international energy efficiency standard.

The [GS1 digital link](https://www.gs1.org/standards/gs1-digital-link) associated with the object. This URL should conform to the particular requirements of digital links. The link should only contain the Application Identifiers (AIs) that are relevant for the entity being annotated, for instance a [Product](https://schema.org/Product) or an [Organization](https://schema.org/Organization), and for the correct granularity. In particular, for products: - A Digital Link that contains a serial number (AI `21`) should only be present on instances of [IndividualProduct](https://schema.org/IndividualProduct) - A Digital Link that contains a lot number (AI `10`) should be annotated as [SomeProducts](https://schema.org/SomeProducts) if only products from that lot are sold, or [IndividualProduct](https://schema.org/IndividualProduct) if there is only a specific product. - A Digital Link that contains a global model number (AI `8013`) should be attached to a [Product](https://schema.org/Product) or a [ProductModel](https://schema.org/ProductModel). Other item types should be adapted similarly.

A measurement of an item, For example, the inseam of pants, the wheel size of a bicycle, the gauge of a screw, or the carbon footprint measured for certification by an authority. 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.

Indicates an item or CreativeWork that is part of this item, or CreativeWork (in some sense).

Indicates a ProductReturnPolicy that may be applicable.

Headline of the article.

The height of the item.

The identifier property represents any kind of identifier for any kind of [Thing](https://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.

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

This links to a node or nodes indicating the exact quantity of the products included in an [Offer](https://schema.org/Offer) or [ProductCollection](https://schema.org/ProductCollection).

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](http://tools.ietf.org/html/bcp47). See also [availableLanguage](https://schema.org/availableLanguage).

Indicates the [productGroupID](https://schema.org/productGroupID) for a [ProductGroup](https://schema.org/ProductGroup) that this product [isVariantOf](https://schema.org/isVariantOf).

The number of interactions for the CreativeWork using the WebSite or SoftwareApplication. The most specific child type of InteractionCounter should be used.

The predominant mode of learning supported by the learning resource. Acceptable values are 'active', 'expositive', or 'mixed'.

Used to indicate a specific claim contained, implied, translated or refined from the content of a [MediaObject](https://schema.org/MediaObject) or other [CreativeWork](https://schema.org/CreativeWork). The interpreting party can be indicated using [claimInterpreter](https://schema.org/claimInterpreter).

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

A pointer to another product (or multiple products) for which this product is an accessory or spare part.

A resource from which this work is derived or from which it is a modification or adaptation.

A resource that was used in the creation of this resource. This term can be repeated for multiple sources. For example, http://example.com/great-multiplication-intro.html.

A pointer to another product (or multiple products) for which this product is a consumable.

Indicates whether this content is family friendly.

Indicates an item or CreativeWork that this item, or CreativeWork (in some sense), is part of.

A pointer to another, somehow related product (or multiple products).

A pointer to another, functionally similar product (or multiple products).

Indicates the kind of product that this is a variant of. In the case of [ProductModel](https://schema.org/ProductModel), this is a pointer (from a ProductModel) to a base product from which this product is a variant. It is safe to infer that the variant inherits all product features from the base model, unless defined locally. This is not transitive. In the case of a [ProductGroup](https://schema.org/ProductGroup), the group description also serves as a template, representing a set of Products that vary on explicitly defined, specific dimensions only (so it defines both a set of variants, as well as which values distinguish amongst those variants). When used with [ProductGroup](https://schema.org/ProductGroup), this property can apply to any [Product](https://schema.org/Product) included in the group.

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.

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 predominant type or kind characterizing the learning resource. For example, 'presentation', 'handout'.

A license document that applies to this content, typically indicated by URL.

The location where the CreativeWork was created, which may not be the same as the location depicted in the CreativeWork.

An associated logo.

Indicates the primary entity described in some page or other CreativeWork.

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.

A maintainer of a [Dataset](https://schema.org/Dataset), software package ([SoftwareApplication](https://schema.org/SoftwareApplication)), or other [Project](https://schema.org/Project). A maintainer is a [Person](https://schema.org/Person) or [Organization](https://schema.org/Organization) that manages contributions to, and/or publication of, some (typically complex) artifact. It is common for distributions of software and data to be based on "upstream" sources. When [maintainer](https://schema.org/maintainer) is applied to a specific version of something e.g. a particular version or packaging of a [Dataset](https://schema.org/Dataset), it is always possible that the upstream source has a different maintainer. The [isBasedOn](https://schema.org/isBasedOn) property can be used to indicate such relationships between datasets to make the different maintenance roles clear. Similarly in the case of software, a package may have dedicated maintainers working on integration into software distributions such as Ubuntu, as well as upstream maintainers of the underlying work.

The manufacturer of the product.

A material that something is made from, e.g. leather, wool, cotton, paper.

The quantity of the materials being described or an expression of the physical space they occupy.

Indicates that the CreativeWork contains a reference to, but is not necessarily about a concept.

The [mobileUrl](https://schema.org/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](https://schema.org/Product) and [Offer](https://schema.org/Offer), rather than [Thing](https://schema.org/Thing). The general trend in web technology is towards [responsive design](https://en.wikipedia.org/wiki/Responsive_web_design) in which content can be flexibly adapted to a wide range of browsing environments. Pages and sites referenced with the long-established [url](https://schema.org/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](https://schema.org/url) markup to use [mobileUrl](https://schema.org/mobileUrl) for more mobile-oriented pages. The property is intended for the case when items (primarily [Product](https://schema.org/Product) and [Offer](https://schema.org/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 model of the product. Use with the URL of a ProductModel or a textual representation of the model identifier. The URL of the ProductModel can be from an external source. It is recommended to additionally provide strong product identifiers via the gtin8/gtin13/gtin14 and mpn properties.

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

The name of the item.

Provides negative considerations regarding something, most typically in pro/con lists for reviews (alongside [positiveNotes](https://schema.org/positiveNotes)). For symmetry In the case of a [Review](https://schema.org/Review), the property describes the [itemReviewed](https://schema.org/itemReviewed) from the perspective of the review; in the case of a [Product](https://schema.org/Product), the product itself is being described. Since product descriptions tend to emphasise positive claims, it may be relatively unusual to find [negativeNotes](https://schema.org/negativeNotes) used in this way. Nevertheless for the sake of symmetry, [negativeNotes](https://schema.org/negativeNotes) can be used on [Product](https://schema.org/Product). The property values can be expressed either as unstructured text (repeated as necessary), or if ordered, as a list (in which case the most negative is at the beginning of the list).

Indicates the [NATO stock number](https://en.wikipedia.org/wiki/NATO_Stock_Number) (nsn) of a [Product](https://schema.org/Product).

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.

A person or organization who owns this Thing.

A pattern that something has, for example 'polka dot', 'striped', 'Canadian flag'. Values are typically expressed as text, although links to controlled value schemes are also supported.

The position of an item in a series or sequence of items.

Provides positive considerations regarding something, for example product highlights or (alongside [negativeNotes](https://schema.org/negativeNotes)) pro/con lists for reviews. In the case of a [Review](https://schema.org/Review), the property describes the [itemReviewed](https://schema.org/itemReviewed) from the perspective of the review; in the case of a [Product](https://schema.org/Product), the product itself is being described. The property values can be expressed either as unstructured text (repeated as necessary), or if ordered, as a list (in which case the most positive is at the beginning of the list).

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

The person or organization who produced the work (e.g. music album, movie, TV/radio series etc.).

The product identifier, such as ISBN. For example: `meta itemprop="productID" content="isbn:123-456-789"`.

The date of production of the item, e.g. vehicle.

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.

A publication event associated with the item.

The publisher of the article in question.

The publishing division which published the comic.