{

"resourceType": "Substance",
"id": "f203",
"text": {
  "status": "generated",
  "div": "<div><p><b>Generated Narrative with Details</b></p><p><b>id</b>: f203</p><p><b>identifier</b>: 1234</p><p><b>category</b>: Chemical <span>(Details : {http://hl7.org.fhir/substance-category code 'chemical' = '??', given as 'Chemical'})</span></p><p><b>code</b>: Potassium <span>(Details : {SNOMED CT code '88480006' = '88480006', given as 'Potassium'})</span></p></div>"
},
"identifier": [
  {
    "system": "http://acme.org/indentifiers/substances",
    "value": "1234"
  }
],
"category": [
  {
    "coding": [
      {
        "system": "http://hl7.org.fhir/substance-category",
        "code": "chemical",
        "display": "Chemical"
      }
    ]
  }
],
"code": {
  "coding": [
    {
      "system": "http://snomed.info/sct",
      "code": "88480006",
      "display": "Potassium"
    }
  ]
}

}