/**
 * Package structure check.
 *
 * Verifies the package contains the four OPC-mandatory parts (every xlsx
 * must have these to be considered an Open Packaging Convention file) and
 * that every XML-like part is syntactically well-formed.
 *
 * XML well-formedness is the broadest reachable check — it catches
 * unclosed tags, bad escapes, and invalid entities that would cause Excel
 * to repair-or-reject the whole package. We parse via DOM (which
 * internally delegates to SAX) so that subsequent DOM-based checkers hit
 * the same cached result.
 */
import type { ValidationContext } from "./context.js";
export declare function checkStructure(ctx: ValidationContext): void;
/**
 * Walk every XML-like entry and parse it to surface malformed-XML
 * problems. Leverages the context cache so DOM-based checkers that run
 * afterwards do not re-parse.
 */
export declare function checkXmlWellFormed(ctx: ValidationContext): void;