/**
 * Workbook-level check.
 *
 * Reads `xl/workbook.xml` as DOM (replacing the previous regex-based
 * approach, which missed namespaced elements like `<x:sheet>`) and walks
 * every `<sheet>` declaration to verify:
 *
 *   - `sheetId` uniqueness (OOXML requires globally unique sheet IDs).
 *   - `r:id` uniqueness and pointing to a worksheet-type relationship.
 *   - `name` attribute presence and Excel's name constraints:
 *       · 1–31 characters
 *       · No characters in `\ / ? * [ ] :`
 *       · Not repeated case-insensitively
 *   - CT_Workbook child element ordering (ECMA-376 Part 1 §18.2.27).
 *     Excel rejects files whose direct children of `<workbook>` violate
 *     the XSD sequence order.
 */
import type { ValidationContext } from "./context.js";
export declare function checkWorkbook(ctx: ValidationContext): void;