/**
 * Excel Spreadsheet (XLSX) Parser
 *
 * **XLSX Format Overview:**
 * XLSX is the default format for Microsoft Excel since Office 2007, based on OOXML.
 *
 * **File Structure:**
 * - `xl/workbook.xml` - Workbook structure and sheet list
 * - `xl/worksheets/sheet1.xml` - Individual sheet data
 * - `xl/sharedStrings.xml` - Shared string table (cell text)
 * - `xl/styles.xml` - Cell styling information
 * - `xl/drawings/*` - Charts and drawings
 * - `xl/media/*` - Embedded images
 *
 * **Key Elements:**
 * - `<row>` - Table row with row index
 * - `<c r="A1">` - Cell with reference (A1, B2, etc.)
 * - `<v>` - Cell value (number or shared string index)
 * - `<t="s">` - Cell type (s=string, n=number, b=boolean)
 *
 * @module ExcelParser
 * @see https://www.ecma-international.org/publications-and-standards/standards/ecma-376/
 */
import { OfficeParserAST, OfficeParserConfig } from '../types';
/**
 * Parses an Excel spreadsheet (.xlsx) and extracts sheets, rows, and cells.
 *
 * @param buffer - The XLSX file as a Buffer
 * @param config - Parser configuration
 * @returns A promise resolving to the parsed AST
 */
export declare const parseExcel: (buffer: Buffer, config: OfficeParserConfig) => Promise<OfficeParserAST>;