{
    "source": {
        "type": "file",
        "location": "sample-invoice.pdf",
        "filename": "sample-invoice.pdf"
    },
    "metadata": {
        "Producer": "Prince 20160617 (www.princexml.com)",
        "Pages": 1
    },
    "references": {
        "url": [
            "http://www.princexml.com",
            "http://www.yeslogic.com",
            "www.yeslogic.com",
            "https://www.commbank.com.au/"
        ]
    }
}