Relates a property to a property that is its inverse. Inverse properties relate the same pairs of items to each other, but in reversed direction. For example, the 'alumni' and 'alumniOf' properties are inverseOf each other. Some properties don't have explicit inverses; in these situations RDFa and JSON-LD syntax for reverse properties can be used.

Relates a property to a class that constitutes (one of) the expected type(s) for values of the property.

Relates a property to a class that is (one of) the type(s) the property is expected to be used on.

URL of the item.

The target group associated with a given audience (e.g. veterans, car owners, musicians, etc.).

The status of the study (enumerated).

A member of an Organization or a ProgramMembership. Organizations can be members of organizations; ProgramMembership is typically for individuals.

An Organization (or ProgramMembership) to which this Person or Organization belongs.

The type of permission granted the person, organization, or audience.

The telephone number.

The category or type of credential being described, for example "degree”, “certificate”, “badge”, or more specific term.

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*.

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

The date when the item is no longer valid.

The date when the item becomes valid.

The person, organization, contact point, or audience that has been granted this permission.

The subject matter of an object.

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).

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

Relates a term (i.e. a property, class or enumeration) to one that supersedes it.

A person or organization who owns this Thing.

Email address.

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