/**
 * HTML entity decoding and tag stripping utilities for EDINET XBRL data.
 *
 * EDINET XBRL files contain text blocks with escaped HTML entities (e.g., <p>, ').
 * This module provides functions to decode these entities and strip HTML tags to produce clean text.
 */
/**
 * Decodes HTML entities in a string.
 * Supports common HTML entities like <, >, &, ", ', and numeric entities.
 *
 * @param text - Text containing HTML entities
 * @returns Text with HTML entities decoded
 */
export declare function decodeHtmlEntities(text: string): string;
/**
 * Removes HTML tags from a string.
 * This is a simple regex-based approach suitable for cleaning XBRL text blocks.
 *
 * IMPORTANT: This function is for EXTRACTING text content from HTML, not for sanitizing
 * untrusted input for HTML rendering. The output is plain text and should not be
 * rendered as HTML. For HTML sanitization, use a dedicated library like DOMPurify.
 *
 * @param text - Text containing HTML tags
 * @returns Text with HTML tags removed
 */
export declare function stripHtmlTags(text: string): string;
/**
 * Decodes HTML entities and removes HTML tags from text.
 * This is the main function to clean EDINET XBRL text blocks.
 *
 * @param text - Text with HTML entities and tags
 * @returns Clean text without HTML entities or tags
 */
export declare function cleanHtml(text: string | undefined): string | undefined;