core + pending (Pending Extension): these terms are pending wider review. Feedback is welcomed!

linkRelationship

Defined in the pending.schema.org extension.
Canonical URL: http://schema.org/linkRelationship

Thing > Property > linkRelationship

Indicates the relationship type of a Web link.

Usage: Fewer than 10 domains
Values expected to be one of these types
Text
Used on these types
LinkRole

Source

https://github.com/schemaorg/schemaorg/issues/1045

Schema Version 3.1