# about

The subject matter of an object.

## Expected Types

| Type | Description |
|------|-------------|
| [Thing](https://schema.org.ai/Thing) | The most generic type of item. |

## Used on Types

| Type | Description |
|------|-------------|
| [Certification](https://schema.org.ai/Certification) | A Certification is an official and authoritative statement about a subject, for example a product, service, person, or organization. A certification is typically issued by an indendent certification body, for example a professional organization or government. It formally attests certain characteristics about the subject, for example Organizations can be ISO certified, Food products can be certified Organic or Vegan, a Person can be a certified professional, a Place can be certified for food processing. There are certifications for many domains: regulatory, organizational, recycling, food, efficiency, educational, ecological, etc. A certification is a form of credential, as are accreditations and licenses. Mapped from the [gs1:CertificationDetails](https://www.gs1.org/voc/CertificationDetails) class in the GS1 Web Vocabulary. |
| [CommunicateAction](https://schema.org.ai/CommunicateAction) | The act of conveying information to another person via a communication medium (instrument) such as speech, email, or telephone conversation. |
| [CreativeWork](https://schema.org.ai/CreativeWork) | The most generic kind of creative work, including books, movies, photographs, software programs, etc. |
| [DefinedTerm](https://schema.org.ai/DefinedTerm) | A word, name, acronym, phrase, etc. with a formal definition. Often used in the context of category or subject classification, glossaries or dictionaries, product or creative work types, etc. Use the name property for the term being defined, use termCode if the term has an alpha-numeric code allocated, use description to provide the definition of the term. Use the about property to specify what the term is about. |
| [DefinedTermSet](https://schema.org.ai/DefinedTermSet) | A set of defined terms, for example a set of categories or a classification scheme, a glossary, dictionary or enumeration. Use the about property to specify what the term set is about. |
| [Event](https://schema.org.ai/Event) | An event happening at a certain time and location, such as a concert, lecture, or festival. Ticketing information may be added via the [offers](https://schema.org.ai/offers) property. Repeated events may be structured as separate Event objects. |

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Quoted from Schema.org 30.1, https://schema.org/about, under CC BY-SA 3.0. Served by the Org.AI Foundation at https://schema.org.ai/about.