import type { Bundle, CodeableConcept, Observation, Questionnaire, QuestionnaireItem, QuestionnaireResponse, QuestionnaireResponseItemAnswer } from 'fhir/r4';
/**
 * Extract an array of Observations from a QuestionnaireResponse and its source Questionnaire.
 * @see https://build.fhir.org/ig/HL7/sdc/extraction.html#observation-based-extraction
 *
 * @author Riza Nafis
 */
export declare function extractObservationBased(questionnaire: Questionnaire, questionnaireResponse: QuestionnaireResponse): Observation[];
export type Extractable = {
    extractable: boolean;
    extractCategories: CodeableConcept[];
};
export declare function mapQItemsExtractable(questionnaire: Questionnaire): Record<string, Extractable>;
export declare function createObservation(questionnaireItem: QuestionnaireItem, questionnaireResponse: QuestionnaireResponse, answer: QuestionnaireResponseItemAnswer, categories: CodeableConcept[]): Observation;
export declare function generateUniqueId(prefix: string): string;
/**
 * Checks whether a Questionnaire or any of its items contains a valid `sdc-questionnaire-observationExtract` extension (and if it's at the item level, a valid item.code too).
 * Array.prototype.some() is short-circuiting, so it will return true as soon as it finds a valid extension.
 *
 * @param questionnaire - The FHIR Questionnaire to check.
 * @returns `true` if at least one valid observationExtract extension exists.
 */
export declare function canBeObservationExtracted(questionnaire: Questionnaire): boolean;
export declare function buildBundleFromObservationArray(observations: Observation[]): Bundle;