This property ensures that an API has a deprecation policy shared as part of the contract, communicating what the lifespan of APIs are, each individual version, as well as communication around the deprecation of APIs
APIs.json Apis Properties Deprecation Policy Info
Message: Has Deprecation Policy
Policies
Deprecation
Deprecation is how you communicate that an API is on its way out. Having a clear policy for timelines, headers, and communication gives consumers the time they need to migrate without panic.