/**
 * Number Formatting Utilities
 *
 * Shared utilities for converting numbers to various formats (Roman numerals,
 * alphabetic labels), used by both header processing and cross-reference processing.
 */
/**
 * Converts a number to Roman numeral
 *
 * Generates Roman numerals for header numbering using standard Roman numeral
 * conversion rules. Supports both uppercase and lowercase formats.
 *
 * @param {number} num - Number to convert (must be positive)
 * @param {boolean} [lowercase=false] - Whether to return lowercase roman numerals
 * @returns {string} Roman numeral string
 * @example
 * ```typescript
 * console.log(getRomanNumeral(1));        // 'I'
 * console.log(getRomanNumeral(4));        // 'IV'
 * console.log(getRomanNumeral(9));        // 'IX'
 * console.log(getRomanNumeral(10));       // 'X'
 * console.log(getRomanNumeral(49));       // 'XLIX'
 * console.log(getRomanNumeral(1994));     // 'MCMXCIV'
 * console.log(getRomanNumeral(5, true));  // 'v'
 * ```
 */
export declare function getRomanNumeral(num: number, lowercase?: boolean): string;
/**
 * Converts a number to alphabetic label (a, b, c, ... z, aa, ab, ...)
 *
 * Generates alphabetic labels for header numbering using a base-26 system.
 * Supports extended sequences beyond 'z' using double letters (aa, ab, etc.).
 *
 * @param {number} num - Number to convert (1-based)
 * @returns {string} Alphabetic label in lowercase
 * @example
 * ```typescript
 * console.log(getAlphaLabel(1));  // 'a'
 * console.log(getAlphaLabel(26)); // 'z'
 * console.log(getAlphaLabel(27)); // 'aa'
 * console.log(getAlphaLabel(28)); // 'ab'
 * console.log(getAlphaLabel(52)); // 'az'
 * console.log(getAlphaLabel(53)); // 'ba'
 * ```
 */
export declare function getAlphaLabel(num: number): string;
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