import { type Data } from "./data.js";
import type { AnyCaller } from "./function.js";
/**
 * Escape a string for safe inclusion in XML text content or attribute values.
 *
 * @param value The raw string value.
 * @returns The escaped XML-safe string.
 *
 * @example
 * escapeXML(`Tom & "Jerry"`)
 */
export declare function escapeXML(value: string): string;
/**
 * Build an XML string from a data object.
 *
 * - Only data objects can be converted directly because XML requires named root and child elements.
 * - `undefined` values are omitted from the output.
 * - Nested data objects become nested XML elements.
 *
 * @param data The data object to serialize.
 * @param caller The calling function for error context.
 * @returns The serialized XML string.
 *
 * @throws {RequiredError} If a key is not a valid XML element name.
 * @throws {RequiredError} If a value cannot be converted to XML.
 *
 * @example
 * getXML({ user: { name: "Alice", age: 30 } })
 */
export declare function getXML(data: Data, caller?: AnyCaller): string;