Package-level declarations

Indicates that the linked resource supports authentication with the associated Authentication Document.

Indicated the availability of a given resource.

Library-specific feature that contains information about the copies that a library has acquired.

Library-specific features when a specific book is unavailable but provides a hold list.

Indirect acquisition provides a hint for the expected media type that will be acquired after additional steps.

Provides a hint about the expected number of items returned.

The price of a publication is tied to its acquisition link.