/**
 * YAML Front Matter Auto-Population Module for Legal Markdown Documents
 *
 * This module provides functionality to auto-populate YAML front matter with inferred
 * header level patterns and processing properties following the original Legal Markdown
 * specification. It analyzes document structure and generates enhanced metadata.
 *
 * Features:
 * - Document structure analysis for header level inference
 * - Auto-population of missing header level definitions
 * - Properties section generation (no-indent, no-reset, level-style)
 * - YAML front matter enhancement and standardization
 * - Support for both traditional (l., ll., lll.) and alternative syntax
 *
 * @example
 * ```typescript
 * import { autoPopulateYamlFrontMatter } from './yaml-auto-population';
 *
 * const content = `---
 * level-1: "Article 1."
 * level-2: "Section 1."
 * ---
 * l. Introduction
 * ll. Terms`;
 *
 * const enhanced = autoPopulateYamlFrontMatter(content);
 * // Returns document with enhanced YAML front matter including
 * // all level definitions and Properties section
 * ```
 *
 * @module
 */
/**
 * Configuration for YAML auto-population
 */
interface YamlAutoPopulationOptions {
    /** Whether to add Properties section with processing configurations */
    includeProperties?: boolean;
    /** Whether to infer missing header levels from document content */
    inferMissingLevels?: boolean;
    /** Whether to ensure all level definitions are properly quoted */
    ensureQuotedLevels?: boolean;
}
/**
 * Default header level patterns following Legal Markdown conventions
 *
 * For complete documentation on header formats and variable usage, see:
 * @see {@link ../../../docs/headers_numbering.md} - Complete guide to headers and numbering system
 */
/**
 * Auto-populates YAML front matter with inferred header patterns and properties
 *
 * Analyzes the document structure and enhances the YAML front matter with:
 * - Missing header level definitions
 * - Properties section with processing configurations
 * - Properly quoted level definitions
 *
 * @param {string} content - The document content with YAML front matter
 * @param {YamlAutoPopulationOptions} [options={}] - Configuration options
 * @returns {string} Document with enhanced YAML front matter
 * @example
 * ```typescript
 * const input = `---
 * level-1: "Article 1."
 * ---
 * l. Introduction
 * ll. Terms`;
 *
 * const result = autoPopulateYamlFrontMatter(input);
 * // Returns document with complete level definitions and Properties section
 * ```
 */
export declare function autoPopulateYamlFrontMatter(content: string, options?: YamlAutoPopulationOptions): string;
/**
 * Generates appropriate no-indent pattern based on document analysis
 *
 * @private
 * @param {string} content - Document content to analyze
 * @returns {string} Comma-separated no-indent pattern
 */
export declare function generateNoIndentPattern(content: string): string;
/**
 * Validates and normalizes YAML front matter structure
 *
 * Ensures the YAML front matter follows the expected structure with
 * proper sectioning and formatting.
 *
 * @param {Record<string, any>} metadata - Metadata to validate
 * @returns {Record<string, any>} Normalized metadata
 */
export declare function normalizeYamlStructure(metadata: Record<string, any>): Record<string, any>;
export {};
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