{
  "description": "When reaction started",
  "_filename": "SearchParameter-Immunization-reaction-date.json",
  "package_name": "hl7.fhir.r5.core",
  "date": "2019-12-31T21:03:40+11:00",
  "expression": "Immunization.reaction.date",
  "publisher": "Health Level Seven International (Public Health and Emergency Response)",
  "name": "reaction-date",
  "xpath": "f:Immunization/f:reaction/f:date",
  "xpathUsage": "normal",
  "type": "date",
  "experimental": "false",
  "resourceType": "SearchParameter",
  "title": null,
  "package_version": "4.2.0",
  "extension": [ {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "normative"
  } ],
  "status": "active",
  "id": "4491c5e6-58f9-4a11-8096-07a81edb400d",
  "kind": null,
  "url": "http://hl7.org/fhir/SearchParameter/Immunization-reaction-date",
  "code": "reaction-date",
  "comparator": [ "eq", "ne", "gt", "ge", "lt", "le", "sa", "eb", "ap" ],
  "base": [ "Immunization" ],
  "version": "4.2.0",
  "contact": [ {
    "telecom": [ {
      "value": "http://hl7.org/fhir",
      "system": "url"
    } ]
  }, {
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/pher/index.cfm",
      "system": "url"
    } ]
  } ]
}