{

"resourceType": "SearchParameter",
"id": "example-reference",
"url": "http://hl7.org/fhir/SearchParameter/example-reference",
"name": "Example Search Parameter",
"status": "draft",
"experimental": true,
"date": "2013-10-23",
"publisher": "Health Level Seven International (FHIR Infrastructure)",
"contact": [
  {
    "name": "[string]",
    "telecom": [
      {
        "system": "url",
        "value": "http://hl7.org/fhir"
      }
    ]
  }
],
"description": "Search by condition subject",
"purpose": "Need to search Condition by subject",
"code": "subject",
"base": [
  "Condition"
],
"type": "reference",
"expression": "Condition.subject",
"xpathUsage": "normal",
"target": [
  "Organization"
],
"modifier": [
  "missing"
],
"chain": [
  "name",
  "identifier"
]

}