{
  "resourceType": "SearchParameter",
  "id": "DocumentReference-period",
  "url": "http://hl7.org/fhir/SearchParameter/DocumentReference-period",
  "name": "period",
  "status": "draft",
  "experimental": false,
  "publisher": "Health Level Seven International (Structured Documents)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org/fhir"
        }
      ]
    },
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/structure/index.cfm"
        }
      ]
    }
  ],
  "code": "period",
  "base": [
    "DocumentReference"
  ],
  "type": "date",
  "description": "Time of service that is being documented",
  "expression": "DocumentReference.context.period",
  "xpath": "f:DocumentReference/f:context/f:period",
  "xpathUsage": "normal"
}