import { IQuantity, ICodeableConcept, IRange, IElement } from 'fhirtypes/dist/r4';
import { IObservationReferenceRange, IOperationOutcome } from 'fhirtypes/dist/r4';
import { BackboneElement, IValidatable, ISerializable } from '../base';
/**
 * @version R4 (v4.0.1)
 * @summary FHIR® Specification by HL7®
 * @description Class for ObservationReferenceRange BackboneElement
 * @property {IQuantity} low
 * @property {IQuantity} high
 * @property {ICodeableConcept} type
 * @property {ICodeableConcept[]} appliesTo
 * @property {IRange} age
 * @property {string} text
 * @property {IElement} _text
 * @author Roberto Araneda Espinoza
 */
export declare class ObservationReferenceRange extends BackboneElement implements IObservationReferenceRange, IValidatable, ISerializable {
    /**
     * @description The value of the low bound of the reference range.  The low bound of the reference range endpoint is inclusive of the value (e.g.  reference range is >=5 - <=9). If the low bound is omitted,  it is assumed to be meaningless (e.g. reference range is <=2.3).
     */
    low?: IQuantity;
    /**
     * @description The value of the high bound of the reference range.  The high bound of the reference range endpoint is inclusive of the value (e.g.  reference range is >=5 - <=9). If the high bound is omitted,  it is assumed to be meaningless (e.g. reference range is >= 2.3).
     */
    high?: IQuantity;
    /**
     * @description Codes to indicate the what part of the targeted reference population it applies to. For example, the normal or therapeutic range.
     */
    type?: ICodeableConcept;
    /**
     * @description Codes to indicate the target population this reference range applies to.  For example, a reference range may be based on the normal population or a particular sex or race.  Multiple `appliesTo`  are interpreted as an "AND" of the target populations.  For example, to represent a target population of African American females, both a code of female and a code for African American would be used.
     */
    appliesTo?: ICodeableConcept[];
    /**
     * @description The age at which this reference range is applicable. This is a neonatal age (e.g. number of weeks at term) if the meaning says so.
     */
    age?: IRange;
    /**
     * @description Text based reference range in an observation which may be used when a quantitative range is not appropriate for an observation.  An example would be a reference value of "Negative" or a list or table of "normals".
     */
    text?: string;
    /**
     * @description Extensions for text
     */
    _text?: IElement;
    /**
     * @description Returns a JSON representation of the model
     * @returns {Record<string, any>}
     */
    toJson(): Record<string, any>;
    /**
     * @description Returns a string representation of the model
     * @returns {string}
     */
    toString(): string;
    /**
     * @description Returns a pretty string representation of the model
     * @returns {string}
     */
    toPrettyString(): string;
    /**
     * @description Returns a serialized string representation of the model
     * @returns {string}
     */
    serialize(): string;
    /**
     * @description Validates the model
     * @returns {isValid: boolean, operationOutcome: IOperationOutcome}
     */
    validate(): {
        isValid: boolean;
        operationOutcome: IOperationOutcome;
    };
    constructor(args?: IObservationReferenceRange);
}