{description: The value set to instantiate this attribute should be drawn from a terminologically robust code system that consists of or contains concepts to support the definition of dates relevant to recommendations for future doses of vaccines. This value set is provided as a suggestive example., package_name: hl7.fhir.r4b.core, name: ImmunizationRecommendationDateCriterionCodes, type: null, package_version: 4.1.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/ValueSet/immunization-recommendation-date-criterion', version: 4.1.0}