Hunz

{
   “properties”: {
      “users”: { 
	“type”: “array”
		“items”: {
			'$ref': '#/definitions/user’
	}
     },
     “tasks”: { 
	“type”: “array”
	“items”: {
		'$ref': '#/definitions/task’
	}
    }
},
  definitions: {
     “task”: {
     	“properties”: {
      		"name" : {"type" :String}
		“assignee”:  {"type" : String}
	}
	   links: [
      {
         'rel': 'full',
         'href': '#/users/{assignee}',
         'targetSchema': {
            '$ref': '#/definitions/user’
          }
      }
   ],
     }
     "user" {
     	“properties”: {
		"name": {type: string}
     		"id": {type: string}
		}
     }
   }
}

instance

{
  users: [
    { id: 8238a,
      name: "Jonas"
     },
    { id: 8228b,
    name: "Eugen"}
    ],
    tasks: [
        { name: "do this",
          assignee: "8238a",
        }
        ]
    
}