import { IElement, IAttachment, ICoding, IQuantity, IReference, IQuestionnaireResponseItem } from 'fhirtypes/dist/r4';
import { IQuestionnaireResponseAnswer, IOperationOutcome } from 'fhirtypes/dist/r4';
import { BackboneElement, IValidatable, ISerializable } from '../base';
/**
  * @version R4 (v4.0.1)
  * @summary FHIR® Specification by HL7®
  * @description Class for QuestionnaireResponseAnswer BackboneElement
  undefined
  * @property {boolean} valueBoolean
  * @property {IElement} _valueBoolean
  * @property {number} valueDecimal
  * @property {IElement} _valueDecimal
  * @property {number} valueInteger
  * @property {IElement} _valueInteger
  * @property {string} valueDate
  * @property {IElement} _valueDate
  * @property {string} valueDateTime
  * @property {IElement} _valueDateTime
  * @property {string} valueTime
  * @property {IElement} _valueTime
  * @property {string} valueString
  * @property {IElement} _valueString
  * @property {string} valueUri
  * @property {IElement} _valueUri
  * @property {IAttachment} valueAttachment
  * @property {ICoding} valueCoding
  * @property {IQuantity} valueQuantity
  * @property {IReference} valueReference
  * @property {IQuestionnaireResponseItem[]} item
  * @author Roberto Araneda Espinoza
  */
export declare class QuestionnaireResponseAnswer extends BackboneElement implements IQuestionnaireResponseAnswer, IValidatable, ISerializable {
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueBoolean?: boolean;
    /**
     * @description Extensions for valueBoolean
     */
    _valueBoolean?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueDecimal?: number;
    /**
     * @description Extensions for valueDecimal
     */
    _valueDecimal?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueInteger?: number;
    /**
     * @description Extensions for valueInteger
     */
    _valueInteger?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueDate?: string;
    /**
     * @description Extensions for valueDate
     */
    _valueDate?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueDateTime?: string;
    /**
     * @description Extensions for valueDateTime
     */
    _valueDateTime?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueTime?: string;
    /**
     * @description Extensions for valueTime
     */
    _valueTime?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueString?: string;
    /**
     * @description Extensions for valueString
     */
    _valueString?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueUri?: string;
    /**
     * @description Extensions for valueUri
     */
    _valueUri?: IElement;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueAttachment?: IAttachment;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueCoding?: ICoding;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueQuantity?: IQuantity;
    /**
     * @description The answer (or one of the answers) provided by the respondent to the question.
     */
    valueReference?: IReference;
    /**
     * @description Nested groups and/or questions found within this particular answer.
     */
    item?: IQuestionnaireResponseItem[];
    /**
     * @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?: IQuestionnaireResponseAnswer);
}