Updated JSON serialization rule for literal values & new graph tree serialization proposal

{
    "=drummond": {
        "[<+email>]": {
            "!1": {
                "&": ""
            },
            "!2": {
                "&": ""
            }
        },
        "<+email>": {
            "/": {
                "$ref": [
                    "=drummond{<+email>]!1"
                ]
            }
        },
        "+home": {
            "<+email>": {
                "/": {
                    "$ref": [
                        "=drummond{<+email>]!2"
                    ]
                }
            }
        },
        "+work": {
            "<+email>": {
                "/": {
                    "$ref": [
                        "=drummond{<+email>]!1"
                    ]
                }
            }
        },
        "/": {
            "+friend": [
                "=markus",
                "=joseph"
            ]
        }
    }
}