GET /Person/123?contentMetadata=XREF
  
{
  "firstName": "Joe",
  "lastName": "Smith",
  "XREF": {
    "item": [
      {
        "rowidXref": 111,
        "firstName": "Joe",
        "lastName": "Smith",
      },
      {
        "rowidXref": 222,
        "firstName": "John",
        "lastName": "Smith"
      }
    ]
  }
}