CybOX Relationships (as reference) - Domain Redirection/Resolution

example.json

{
    "type": "package",
    "spec_version": "stix-2.0",
    "observed_data": [{
        "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": {
                "0" :{
                    "type": "domain-name-object",
                    "spec_version": "cybox-3.0",
                    "value": "http://foo.bar.com",
                    "resolves_to_ref": "2",
                    "redirects_to_ref": "1"
                },
                "1": {
                    "type": "domain-name-object",
                    "spec_version": "cybox-3.0",
                    "value": "http://bar.foo.com"
                },
                "2": {
                    "type": "ipv4-addr-object",
                    "spec_version": "cybox-3.0",
                    "value": "1.2.3.4"
                }
            }
        }
    }]
}