/**
 * Office Math Markup Language (OMML) to LaTeX Processor
 *
 * This module provides functionality to convert Microsoft Office's OMML (Office Math Markup Language)
 * format to LaTeX. OMML is used in DOCX files to represent mathematical equations and expressions.
 *
 * **Conversion Strategy:**
 * - Uses regex-based pattern matching for reliability and performance
 * - Handles common math elements: fractions, superscripts, subscripts, roots
 * - Converts Unicode mathematical symbols to LaTeX equivalents
 * - Provides fallback to plain text for unsupported elements
 *
 * **Supported OMML Elements:**
 * - `<f>` (fractions) → `\frac{}{}`
 * - `<sSup>` (superscripts) → `^{}`
 * - `<sSub>` (subscripts) → `_{}`
 * - `<rad>` (roots) → `\sqrt{}` or `\sqrt[]{}`
 * - Unicode symbols → LaTeX commands
 *
 * @module OmmlProcessor
 */
/**
 * Convert OMML XML string to LaTeX using regex-based pattern matching.
 *
 * This is the main conversion function that processes OMML XML content through
 * a series of transformations to produce clean LaTeX output.
 *
 * **Processing Steps:**
 * 1. Remove XML namespace prefixes for cleaner processing
 * 2. Apply all OMML conversion patterns in sequence
 * 3. Clean up remaining XML tags
 * 4. Convert Unicode symbols to LaTeX equivalents
 * 5. Normalize whitespace and return result
 *
 * **Error Handling:**
 * - Catches any processing errors and logs warnings
 * - Falls back to plain text extraction if conversion fails
 * - Never throws exceptions to avoid breaking the conversion pipeline
 *
 * @param ommlXml - The OMML XML content to convert
 * @returns Clean LaTeX string representation of the math expression
 *
 * @example
 * ```typescript
 * const omml = '<m:f><m:num>1</m:num><m:den>2</m:den></m:f>';
 * const latex = convertOmmlStringToLatex(omml); // Returns '\frac{1}{2}'
 *
 * const complex = '<m:sSup><m:e>x</m:e><m:sup>2</m:sup></m:sSup>';
 * const result = convertOmmlStringToLatex(complex); // Returns 'x^{2}'
 * ```
 */
export declare function convertOmmlStringToLatex(ommlXml: string): string;
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