import type { Property } from "./types.js";
export interface PropertyOptions {
    /** The instance of a generic controller: "Blind.Lift". */
    instance?: string;
    /**
     * When the value last changed. Default: now. message-guide.html, "Property object": "don't set the same
     * timeOfSample value for all properties", so a device that knows when each value changed passes it.
     */
    timeOfSample?: string | Date;
    /** How old the value may be, for a device that is polled. Default: 0. */
    uncertaintyInMilliseconds?: number;
}
/** A time as Alexa wants it: ISO 8601 in UTC. Text is taken as given. */
export declare function isoTime(time?: string | Date): string;
/** One property of a context or of a change, its fields in the order of the examples. */
export declare function property(namespace: string, name: string, value: unknown, options?: PropertyOptions): Property;