Indicates a prototype of the elements in the list that is used to hold aggregate information (ratings, offers, etc.).

Specification of a shipping service offered by the organization.

Description of the process by which the action was performed.

The [MemberProgram](https://schema.org/MemberProgram) associated with a [ProgramMembership](https://schema.org/ProgramMembership).

The member program this tier is a part of.

A requirement for a user to join a membership tier, for example: a CreditCard if the tier requires sign up for a credit card, A UnitPriceSpecification if the user is required to pay a (periodic) fee, or a MonetaryAmount if the user needs to spend a minimum amount to join the tier. If a tier is free to join then this property does not need to be specified.

A member benefit for a particular tier of a loyalty program.

The tiers of a member program.

The type of a payment method.

The membership program tier(s) an Offer (or a PriceSpecification, OfferShippingDetails, or MerchantReturnPolicy under an Offer) is valid for.

MemberProgram offered by an Organization, for example an eCommerce merchant or an airline.

Rating of a certification instance (as defined by an independent certification body). Typically this rating can be used to rate the level to which the requirements of the certification instance are fulfilled. See also [gs1:certificationValue](https://www.gs1.org/voc/certificationValue).

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.

Indicates the current status of a certification: active or inactive. See also [gs1:certificationStatus](https://www.gs1.org/voc/certificationStatus).

Identifier of a certification instance (as registered with an independent certification body). Typically this identifier can be used to consult and verify the certification instance. See also [gs1:certificationIdentification](https://www.gs1.org/voc/certificationIdentification).

Date when a certification was last audited. See also [gs1:certificationAuditDate](https://www.gs1.org/voc/certificationAuditDate).

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.

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

A [National Provider Identifier](https://en.wikipedia.org/wiki/National_Provider_Identifier) (NPI) is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services.

A [MedicalOrganization](https://schema.org/MedicalOrganization) where the [IndividualPhysician](https://schema.org/IndividualPhysician) practices.

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

The number of completed interactions for this entity, in a particular role (the 'agent'), in a particular action (indicated in the statistic), and in a particular context (i.e. interactionService).

The location of origin of the trip, prior to any destination(s).

The length of time an Observation took place over. The format follows `P[0-9]*[Y|M|D|h|m|s]`. For example, P1Y is Period 1 Year, P3M is Period 3 Months, P3h is Period 3 hours.