import type * as logger from "@superbuilders/slog";
/**
 * Validates that no LaTeX content is present in an HTML/XML string fragment.
 * Throws an error if LaTeX is detected.
 * @param htmlFragment The string to validate.
 * @param logger The logger instance.
 */
export declare function checkNoLatex(htmlFragment: string, logger: logger.Logger): void;
/**
 * NEW: Validates that no Perseus artifacts are present in an HTML/XML string fragment.
 * Throws an error if an artifact is detected.
 * @param htmlFragment The string to validate.
 * @param logger The logger instance.
 */
export declare function checkNoPerseusArtifacts(htmlFragment: string, logger: logger.Logger): void;
/**
 * NEW: Validates that no deprecated <mfenced> elements are used in an HTML/XML string fragment.
 * Throws an error if an mfenced element is detected.
 * @param htmlFragment The string to validate.
 * @param logger The logger instance.
 */
export declare function checkNoMfencedElements(htmlFragment: string, logger: logger.Logger): void;
/**
 * A shared utility to convert problematic HTML entities to their character equivalents.
 * @param htmlFragment The HTML string to process.
 * @returns The processed string.
 */
export declare function sanitizeHtmlEntities(htmlFragment: string): string;
/**
 * A shared utility to fix common MathML operator issues.
 * @param htmlFragment The HTML string to process.
 * @returns The processed string.
 */
export declare function sanitizeMathMLOperators(htmlFragment: string): string;
/**
 * Validates that a string contains only XML 1.0 valid characters for character data (PCDATA).
 * Disallows C0 control characters other than TAB (0x09), LF (0x0A), and CR (0x0D),
 * as well as non-characters like U+FFFE/U+FFFF and any unpaired UTF-16 surrogates.
 *
 * Context: The XML validator surfaced "PCDATA invalid Char value <code>" errors for inputs containing
 * characters like \u0002, \u0004, \u0019. This function bans such characters early during pre-validation.
 *
 * @param fragment The text or markup fragment to validate
 * @param logger The logger instance
 */
export declare function checkNoInvalidXmlChars(fragment: string, logger: logger.Logger): void;
/**
 * Validates that no CDATA sections are present in the fragment.
 * QTI requires properly XML-encoded content; CDATA (<![CDATA[ ... ]]>) is disallowed.
 *
 * @param fragment The text or markup fragment to validate
 * @param logger The logger instance
 */
export declare function checkNoCDataSections(fragment: string, logger: logger.Logger): void;
//# sourceMappingURL=qti-validation.d.ts.map