/**
 * This keyword allows a string to be modified during validation.
 * This keyword applies only to strings. If the data is not a string, the transform keyword is ignored.
 * @see https://github.com/ajv-validator/ajv-keywords?tab=readme-ov-file#transform
 */
export declare enum TransformEnum {
    /** remove whitespace from start and end */
    trim = "trim",
    /** remove whitespace from start */
    trimStart = "trimStart",
    /**
     * @alias trimStart
     */
    trimLeft = "trimLeft",
    /** remove whitespace from end */
    trimEnd = "trimEnd",
    /**
     * @alias trimEnd
     */
    trimRight = "trimRight",
    /** convert to lower case */
    toLowerCase = "toLowerCase",
    /** convert to upper case */
    toUpperCase = "toUpperCase",
    /**
     * change string case to be equal to one of `enum` values in the schema
     *
     * **NOTE**: requires that all allowed values are unique when case insensitive
     * ```ts
     * const schema = {
     *   type: "array",
     *   items: {
     *     type: "string",
     *     transform: ["trim", Transform.toEnumCase],
     *     enum: ["pH"],
     *   },
     * };
     *
     * const data = ["ph", " Ph", "PH", "pH "];
     * ajv.validate(schema, data);
     * console.log(data) // ['pH','pH','pH','pH'];
     * ```
     */
    toEnumCase = "toEnumCase"
}