{
  "resourceType": "SearchParameter",
  "id": "Immunization-reaction-date",
  "url": "http://hl7.org/fhir/SearchParameter/Immunization-reaction-date",
  "name": "reaction-date",
  "status": "draft",
  "experimental": false,
  "date": "2017-04-18T21:44:43+00:00",
  "publisher": "Health Level Seven International (Public Health and Emergency Response)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org/fhir"
        }
      ]
    },
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/pher/index.cfm"
        }
      ]
    }
  ],
  "code": "reaction-date",
  "base": [
    "Immunization"
  ],
  "type": "date",
  "description": "When reaction started",
  "expression": "Immunization.reaction.date",
  "xpath": "f:Immunization/f:reaction/f:date",
  "xpathUsage": "normal"
}