CybOX Relationships (as reference) - Metadata

example.json

{
    "type": "package",
    "spec_version": "stix-2.0",
    "observations": [{
        "type": "observation",
        "id": "observation--4",
        "spec_version": "stix-2.0",
        "created_at": "2016-03-21T01:01:01Z",
        "observed_at": "2016-03-21T01:01:01Z",
        "cybox": {
            "objects": [
                {
                    "type": "url-object",
                    "id": "url-object--1",
                    "spec_version": "cybox-3.0",
                    "value": "http://foo.bar.com/qwerty",
                    "redirects_to_ref": {"object_ref":"url-object--2",
                                         "http_redirect_code":"301"}
                },
                {
                    "type": "url-object",
                    "id": "url-object--2",
                    "spec_version": "cybox-3.0",
                    "value": "http://bar.foo.com/dvorak"
                }
            ]
        }
    }]
}