A typical Medication allergy from a clinical system

{
  "resourceType" : "AllergyIntolerance",
  "id" : "medication",
  "clinicalStatus" : {
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/allergyintolerance-clinical",
      "code" : "active",
      "display" : "Active"
    }]
  },
  "verificationStatus" : {
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/allergyintolerance-verification",
      "code" : "unconfirmed",
      "display" : "Unconfirmed"
    }]
  },
  "category" : ["medication"],
  "criticality" : "high",
  "code" : {
    "coding" : [{
      "system" : "http://www.nlm.nih.gov/research/umls/rxnorm",
      "code" : "7980",
      "display" : "Penicillin G"
    }]
  },
  "patient" : {
    "reference" : "Patient/example"
  },
  "recordedDate" : "2010-03-01",
  "recorder" : {
    "reference" : "Practitioner/example"
  },
  "reaction" : [{
    "manifestation" : [{
      "concept" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "247472004",
          "display" : "Hives"
        }]
      }
    }]
  }]
}