{
      "resourceType" : "SearchParameter",
      "id" : "firely-us-core-observation-code-value-concept",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
        "valueCode" : "trial-use"
      }],
      "url" : "http://fire.ly/fhir/us/core/SearchParameter/Observation-code-value-concept",
      "version" : "4.0.1",
      "name" : "code-value-concept",
      "status" : "draft",
      "experimental" : false,
      "date" : "2019-11-01T09:29:23+11:00",
      "publisher" : "Firely",
      "contact" : [{
        "telecom" : [{
          "system" : "url",
          "value" : "https://fire.ly"
        }]
      }],
      "description" : "Code and coded value parameter pair - corrected to use use-core-observation-code",
      "code" : "code-value-concept",
      "base" : ["Observation"],
      "type" : "composite",
      "expression" : "Observation",
      "xpathUsage" : "normal",
      "multipleOr" : false,
      "component" : [{
        "definition" : "http://hl7.org/fhir/us/core/SearchParameter/us-core-observation-code",
        "expression" : "code"
      },
      {
        "definition" : "http://hl7.org/fhir/SearchParameter/Observation-value-concept",
        "expression" : "value.as(CodeableConcept)"
      }]
    }