{description: string 자료형 또는 CodeableConcept 자료형 내 text로 표현된 측정값, package_name: hl7.fhir.kr.core, name: KRCoreSearchParameterObservationValueString, type: string, package_version: 2.0.0, class: unknown, kind: null, url: 'http://www.hl7korea.or.kr/fhir/krcore/SearchParameter/krcore-sp-observation-value-string', version: 2.0.0}