import { Extension } from './Extension.js';
import { FhirPrimitive } from './FhirPrimitive.js';
export interface Period {
    /**
     * @description Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
     * @short Unique id for inter-element referencing
     */
    id?: string;
    /**
     * @description May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
     * @comment There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
     * @short Additional content defined by implementations
     */
    extension?: Extension[];
    /**
     * @description The start of the period. The boundary is inclusive.
     * @comment If the low element is missing, the meaning is that the low boundary is not known.
     * @short Starting time with inclusive boundary
     */
    start?: FhirPrimitive<string>;
    /**
     * @description The end of the period. If the end of the period is missing, it means no end was known or planned at the time the instance was created. The start may be in the past, and the end date in the future, which means that period is expectedplanned to end at that time.
     * @comment The end value includes any matching datetime. i.e. 2012-02-03T10:00:00 is in a period that has an end value of 2012-02-03.
     * @short End time with inclusive boundary, if not ongoing
     */
    end?: FhirPrimitive<string>;
}
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