General Group Example, Characteristic Based

{
  "resourceType" : "Group",
  "id" : "101",
  "text" : {
    "status" : "additional",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n      <p>Herd of 25 horses</p>\n      <p>Gender: mixed</p>\n      <p>Owner: John Smith</p>\n    </div>"
  },
  "identifier" : [{
    "system" : "http://someveterinarianclinic.org/fhir/NamingSystem/herds",
    "value" : "12345"
  }],
  "name" : "John's herd",
  "type" : "animal",
  "membership" : "enumerated",
  "code" : {
    "text" : "Horse"
  },
  "quantity" : 25,
  "characteristic" : [{
    "code" : {
      "text" : "gender"
    },
    "valueCodeableConcept" : {
      "text" : "mixed"
    },
    "exclude" : false
  },
  {
    "code" : {
      "text" : "owner"
    },
    "valueCodeableConcept" : {
      "text" : "John Smith"
    },
    "exclude" : false
  }]
}