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.

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

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

An award 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.

The color of the product.

The depth of the item.

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.

The height of the item.

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

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

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

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

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 associated logo.

The manufacturer of the product.

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.

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 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 date the item, e.g. vehicle, was purchased by the current owner.

The release date of a product or product model. This can be used to distinguish the exact variant of a product.

A review of the item.

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 weight of the product or person.

The width of the item.

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).

An alias for the item.

A description of the item.

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

The subject matter of an object.

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).

Specifies the Person that is legally accountable for the CreativeWork.

A secondary title of the CreativeWork.

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

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.

Fictional person connected with a creative work.

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

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.

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'.

A secondary contributor to the CreativeWork or Event.

The party holding the legal copyright to the CreativeWork.

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

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

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.

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

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 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.

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

Genre of the creative work, broadcast channel or group.

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

Headline of the article.

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).

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

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.

Indicates whether this content is family friendly.

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

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.

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

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

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

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

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 publishingPrinciples property indicates (typically via [URL](https://schema.org/URL)) a document describing the editorial principles of an [Organization](https://schema.org/Organization) (or individual, e.g. a [Person](https://schema.org/Person) writing a blog) that relate to their activities as a publisher, e.g. ethics or diversity policies. When applied to a [CreativeWork](https://schema.org/CreativeWork) (e.g. [NewsArticle](https://schema.org/NewsArticle)) the principles are those of the party primarily responsible for the creation of the [CreativeWork](https://schema.org/CreativeWork). While such policies are most typically expressed in natural language, sometimes related information (e.g. indicating a [funder](https://schema.org/funder)) can be expressed using schema.org terminology.

The Event where the CreativeWork was recorded. The CreativeWork may capture all or part of the event.

The place and time the release was issued, expressed as a PublicationEvent.

Indicates (by URL or string) a particular version of a schema used in some CreativeWork. This property was created primarily to indicate the use of a specific schema.org release, e.g. `10.0` as a simple string, or more explicitly via URL, `https://schema.org/docs/releases.html#v10.0`. There may be situations in which other schemas might usefully be referenced this way, e.g. `http://dublincore.org/specifications/dublin-core/dces/1999-07-02/` but this has not been carefully explored in the community.

The Organization on whose behalf the creator was working.

The textual content of this CreativeWork.

A thumbnail image relevant to the Thing.

Approximate or typical time it usually takes to work with or through the content of this work for the typical or target audience.

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 version of the CreativeWork embodied by a specified resource.

An embedded video object.

Example/instance/realization/derivation of the concept of this creative work. E.g. the paperback edition, first edition, or e-book.