Example of observationdefinition

{
  "resourceType" : "ObservationDefinition",
  "id" : "example",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "oo"
  }],
  "status" : "active",
  "publisher" : "HL7 International / Orders and Observations",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/orders"
    }]
  }],
  "category" : [{
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/observation-category",
      "code" : "laboratory"
    }]
  }],
  "code" : {
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "13980-8",
      "display" : "Albumin/Protein.total in Serum or Plasma by Electrophoresis"
    }]
  },
  "permittedDataType" : ["Quantity"],
  "multipleResultsAllowed" : false,
  "method" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "115341008",
      "display" : "Total measurement"
    }]
  },
  "preferredReportName" : "Serum albumin/​Protein total",
  "permittedUnit" : [{
    "system" : "http://unitsofmeasure.org",
    "code" : "%",
    "display" : "%"
  }],
  "qualifiedValue" : [{
    "context" : {
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/referencerange-meaning",
        "code" : "normal",
        "display" : "Normal Range"
      }]
    },
    "rangeCategory" : "reference",
    "range" : {
      "low" : {
        "value" : 50
      }
    }
  },
  {
    "context" : {
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/referencerange-meaning",
        "code" : "normal",
        "display" : "Normal Range"
      }]
    },
    "rangeCategory" : "critical",
    "range" : {
      "high" : {
        "value" : 40
      }
    }
  }]
}