{
  "resourceType": "SearchParameter",
  "id": "Observation-code-value-date",
  "url": "http://hl7.org/fhir/SearchParameter/Observation-code-value-date",
  "name": "code-value-date",
  "status": "draft",
  "experimental": false,
  "publisher": "Health Level Seven International (Orders and Observations)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org/fhir"
        }
      ]
    },
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/orders/index.cfm"
        }
      ]
    }
  ],
  "code": "code-value-date",
  "base": [
    "Observation"
  ],
  "type": "composite",
  "description": "Code and date/time value parameter pair",
  "expression": "Observation",
  "xpathUsage": "normal",
  "component": [
    {
      "definition": {
        "reference": "http://hl7.org/fhir/SearchParameter/Observation-code"
      },
      "expression": "code"
    },
    {
      "definition": {
        "reference": "http://hl7.org/fhir/SearchParameter/Observation-value-date"
      },
      "expression": "value.as(DateTime) | value.as(Period)"
    }
  ]
}