{description: 'The patient''s date of birth
\nNOTE: This US Core SearchParameter definition extends the usage context of\ncapabilitystatement-expectation\n extension to formally express implementer conformance expectations for these elements:
\n - multipleAnd
\n - multipleOr
\n - comparator
\n - modifier
\n - chain
\n\n ', package_name: hl7.fhir.us.core, name: USCorePatientBirthdate, type: date, package_version: 3.1.1, class: unknown, kind: null, url: 'http://hl7.org/fhir/us/core/SearchParameter/us-core-patient-birthdate', version: 3.1.1}