import { z } from 'zod';
export declare const PeriodSchema: z.ZodObject<{
    id: z.ZodOptional<z.ZodString>;
    start: z.ZodOptional<z.ZodString>;
    end: z.ZodOptional<z.ZodString>;
}, "strip", z.ZodTypeAny, {
    id?: string | undefined;
    start?: string | undefined;
    end?: string | undefined;
}, {
    id?: string | undefined;
    start?: string | undefined;
    end?: string | undefined;
}>;
