To help machines discover the content resources of a scholarly object, use the item link relation type to link from the object's landing page to a URI where actual content of the object is accessible.

To help machines that landed on a content resource of a scholarly object discover its landing page, use the collection link relation type (the inverse of item) to link from the content resource to the landing page.

For both item and collection links:

• The type attribute is used to express the media type of the resource that is the target of the link; see Conventions for further details.
• The profile attribute is used to provide further details regarding the profile of the media type of the linked resource; see Conventions for further details.

The below examples illustrate the use of item and collection links in HTTP Link headers. item links can also be provided in a landing page's HTML link element and/or in a Link Set that is discoverable from the landing page. However, since most content resources are not HTML, collection links can typically only be provided in the HTTP Link header of content resources and/or in a Link Set that is discoverable from the content resource.