import { UnstructuredLoaderOptions } from '@langchain/community/document_loaders/fs/unstructured';
import { BaseDocumentLoader } from 'langchain/document_loaders/base';
import { Document } from '@langchain/core/documents';
/**
 * Represents an element returned by the Unstructured API. It has
 * properties for the element type, text content, and metadata.
 */
type Element = {
    type: string;
    text: string;
    metadata: {
        [key: string]: unknown;
    };
};
export declare class UnstructuredLoader extends BaseDocumentLoader {
    private apiUrl;
    private apiKey;
    private strategy;
    private encoding?;
    private ocrLanguages;
    private coordinates?;
    private pdfInferTableStructure?;
    private xmlKeepTags?;
    private skipInferTableTypes?;
    private hiResModelName?;
    private includePageBreaks?;
    private chunkingStrategy?;
    private multiPageSections?;
    private combineUnderNChars?;
    private newAfterNChars?;
    private maxCharacters?;
    constructor(optionsOrLegacyFilePath: UnstructuredLoaderOptions);
    _partition(buffer: Buffer, fileName: string): Promise<Element[]>;
    loadAndSplitBuffer(buffer: Buffer, fileName: string): Promise<Document[]>;
    load(): Promise<Document[]>;
}
export {};
