/**
 * Relationships check.
 *
 * For every `.rels` file in the package we verify:
 *   - The root element is `<Relationships>` and children are `<Relationship>`.
 *   - Each rel has `Id`, `Type`, and `Target` attributes.
 *   - Relationship `Id` values are unique within the same rels file.
 *   - Non-external targets resolve to files that exist inside the package.
 *   - Resolved targets stay inside the package root (no `..` escape).
 *   - For well-known rel types, the resolved target matches the expected
 *     part-name pattern (e.g. a `Type=...relationships/chart` rel must
 *     point at `xl/charts/chartN.xml`).
 *   - Every non-root rels file has a corresponding source part in the zip.
 *   - The package root rels include an officeDocument rel to `xl/workbook.xml`.
 */
import type { ValidationContext } from "./context.js";
export declare function checkRootRelationships(ctx: ValidationContext): void;
export declare function checkRelationships(ctx: ValidationContext): void;