Property	Expected Type	Description
Properties from Thing
additionalType	Text  or URL	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.
alternateName	Text	An alias for the item.
description	Text  or TextObject	A description of the item.
disambiguatingDescription	Text	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.
identifier	PropertyValue  or Text  or URL	The identifier property represents any kind of identifier for any kind of 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 for more details.
image	ImageObject  or URL	An image of the item. This can be a URL or a fully described ImageObject.
mainEntityOfPage	CreativeWork  or URL	Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details. Inverse property: mainEntity
name	Text	The name of the item.
potentialAction	Action	Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.
sameAs	URL	URL of a reference Web page that unambiguously indicates the item's identity. E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website.
subjectOf	CreativeWork  or Event	A CreativeWork or Event about this Thing. Inverse property: about
url	URL	URL of the item.

Property	On Types	Description
about	Certification  or CommunicateAction  or CreativeWork  or Event	The subject matter of the content.
actionOption	ChooseAction	A sub property of object. The options subject to this action.
category	ActionAccessSpecification  or Invoice  or Offer  or PhysicalActivity  or Product  or Recommendation  or Service  or SpecialAnnouncement	A category for the item. Greater signs or slashes can be used to informally indicate a category hierarchy.
characterAttribute	Game  or VideoGameSeries	A piece of data that represents a particular aspect of a fictional character (skill, power, character points, advantage, disadvantage).
collection	UpdateAction	A sub property of object. The collection target of the action.
dataFeedElement	DataFeed	An item within a data feed. Data feeds may have many elements.
defaultValue	PropertyValueSpecification	The default value of the input. For properties that expect a literal, the default is a literal value, for properties that expect an object, it's an ID reference to one of the current values.
error	Action	For failed actions, more information on the cause of the failure.
gameItem	Game  or VideoGameSeries	An item is an object within the game world that can be collected by a player or, occasionally, a non-player character.
gamePlatform	VideoGame  or VideoGameSeries	The electronic systems used to play video games.
instrument	Action	The object that helped the agent perform the action. E.g. John wrote a book with a pen.
item	DataFeedItem  or ListItem	An entity represented by an entry in a list or data feed (e.g. an 'artist' in a list of 'artists').
itemListElement	ItemList	For itemListElement values, you can use simple strings (e.g. "Peter", "Paul", "Mary"), existing entities, or use ListItem. Text values are best if the elements in the list are plain strings. Existing entities are best for a simple, unordered list of existing things in your data. ListItem is used with ordered lists when you want to provide additional context about the element in that list or when the same item might be in different places in different lists. Note: The order of elements in your mark-up is not sufficient for indicating the order or elements. Use ListItem with a 'position' property in such cases.
itemReviewed	AggregateRating  or Review	The item that is being reviewed/rated.
knowsAbout	Organization  or Person	Of a Person, and less typically of an Organization, to indicate a topic that is known about - suggesting possible expertise but not implying it. We do not distinguish skill levels here, or relate this to educational content, events, objectives or JobPosting descriptions.
mainEntity	CreativeWork	Indicates the primary entity described in some page or other CreativeWork.
mentions	CreativeWork	Indicates that the CreativeWork contains a reference to, but is not necessarily about a concept.
object	Action	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.
observationAbout	Observation	The observationAbout property identifies an entity, often a Place, associated with an Observation.
option	ChooseAction	A sub property of object. The options subject to this action.
produces	Service	The tangible thing generated by the service, e.g. a passport, permit, etc.
quest	Game  or VideoGameSeries	The task that a player-controlled character, or group of characters may complete in order to gain a reward.
replacee	ReplaceAction	A sub property of object. The object that is being replaced.
replacer	ReplaceAction	A sub property of object. The object that replaces.
requiredCollateral	LoanOrCredit	Assets required to secure loan or credit repayments. It may take form of third party pledge, goods, financial instruments (cash, securities, etc.)
reservationFor	Reservation	The thing -- flight, event, restaurant, etc. being reserved.
result	Action	The result produced in the action. E.g. John wrote a book.
serviceOutput	Service	The tangible thing generated by the service, e.g. a passport, permit, etc.
targetCollection	UpdateAction	A sub property of object. The collection target of the action.

• Action
• BioChemEntity
• CreativeWork
• Event
• Intangible
• MedicalEntity
• Organization
• Person
• Place
• Product
• Taxon

Terms and conditions