import type { EnhancedTranslationFile, FormatOptions, IFormatHandler, ValidationResult } from "../format.interface.js";
import type { TranslationFile } from "../translate.interface.js";
export declare class XliffHandler implements IFormatHandler {
    private parser;
    private builder;
    constructor();
    canHandle(filePath: string, content?: string): boolean;
    parse(content: string): EnhancedTranslationFile;
    serialize(data: EnhancedTranslationFile, options?: FormatOptions): string;
    getFileExtension(): string;
    validateStructure(data: TranslationFile): ValidationResult;
    private detectXliffVersion;
    private extractSourceLanguage;
    private extractTargetLanguage;
    private transformXliff12;
    private transformXliff2x;
    private extractTextContent;
    private updateOriginalStructure;
    private updateXliff12Structure;
    private updateXliff2xStructure;
    private reconstructXliff12Structure;
    private validateXliff12;
    private validateXliff2x;
}