OpenAPI and JSON-LD

Hello,

Could you please tell me if OpenAPI supports the use of JSON-LD? 

I am using OpenAPI 3.0.1, and I am trying to include in the Schema some context information in order to add IRIs for objects/properties that are described in the Schema.  

If yes, are there any examples available?

If not, do you know of any alternatives besides using x-<label>?

Thank you very much for your help!

Florina