{

"resourceType": "SearchParameter",
"id": "observation-genetic-Observation-gene-identifier",
"url": "http://hl7.org/fhir/SearchParameter/observation-genetic-Observation-gene-identifier",
"version": "4.0.1",
"name": "gene-identifier",
"status": "draft",
"experimental": true,
"description": "HGNC gene symbol and identifier",
"code": "gene-identifier",
"base": [
  "Observation"
],
"type": "token",
"expression": "Observation.extension('http://hl7.org/fhir/StructureDefinition/observation-geneticsGene')",
"xpathUsage": "normal"

}