/**
 * Prefixes for different adblockers to describe the platform-specific modifiers data
 * stored in the yaml files.
 */
export declare const BLOCKER_PREFIX: {
    AdGuard: string;
    UblockOrigin: string;
    AdblockPlus: string;
};
/**
 * Set of all allowed characters for app name except the dot `.`.
 */
export declare const APP_NAME_ALLOWED_CHARS: Set<string>;
/**
 * Allowed methods for $method modifier.
 *
 * @see {@link https://adguard.app/kb/general/ad-filtering/create-own-filters/#method-modifier}
 */
export declare const ALLOWED_METHODS: Set<string>;
/**
 * Allowed stealth options for $stealth modifier.
 *
 * @see {@link https://adguard.app/kb/general/ad-filtering/create-own-filters/#stealth-modifier}
 */
export declare const ALLOWED_STEALTH_OPTIONS: Set<string>;
/**
 * Allowed CSP directives for $csp modifier.
 *
 * @see {@link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#directives}
 */
export declare const ALLOWED_CSP_DIRECTIVES: Set<string>;
/**
 * Allowed directives for $permissions modifier.
 *
 * @see {@link https://adguard.app/kb/general/ad-filtering/create-own-filters/#permissions-modifier}
 */
export declare const ALLOWED_PERMISSION_DIRECTIVES: Set<string>;
/**
 * One of available tokens for $permission modifier value.
 *
 * @see {@link https://w3c.github.io/webappsec-permissions-policy/#structured-header-serialization}
 */
export declare const PERMISSIONS_TOKEN_SELF = "self";
/**
 * One of allowlist values for $permissions modifier.
 *
 * @see {@link https://developer.mozilla.org/en-US/docs/Web/HTTP/Permissions_Policy#allowlists}
 */
export declare const EMPTY_PERMISSIONS_ALLOWLIST = "()";
/**
 * Allowed directives for $referrerpolicy modifier.
 *
 * @see {@link https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy}
 */
export declare const REFERRER_POLICY_DIRECTIVES: Set<string>;
/**
 * Prefixes for error messages used in modifier validation.
 */
export declare const VALIDATION_ERROR_PREFIX: {
    BLOCK_ONLY: string;
    EXCEPTION_ONLY: string;
    INVALID_CSP_DIRECTIVES: string;
    INVALID_LIST_VALUES: string;
    INVALID_NOOP: string;
    INVALID_PERMISSION_DIRECTIVE: string;
    INVALID_PERMISSION_ORIGINS: string;
    INVALID_PERMISSION_ORIGIN_QUOTES: string;
    INVALID_REFERRER_POLICY_DIRECTIVE: string;
    MIXED_NEGATIONS: string;
    NO_CSP_VALUE: string;
    NO_CSP_DIRECTIVE_QUOTE: string;
    NO_UNESCAPED_PERMISSION_COMMA: string;
    NOT_EXISTENT: string;
    NOT_NEGATABLE_MODIFIER: string;
    NOT_NEGATABLE_VALUE: string;
    NOT_SUPPORTED: string;
    REMOVED: string;
    VALUE_FORBIDDEN: string;
    VALUE_INVALID: string;
    VALUE_REQUIRED: string;
};
/**
 * Prefixes for error messages related to issues in the source YAML files' data.
 */
export declare const SOURCE_DATA_ERROR_PREFIX: {
    INVALID_VALUE_FORMAT_REGEXP: string;
    NO_DEPRECATION_MESSAGE: string;
    NO_VALUE_FORMAT_FOR_ASSIGNABLE: string;
};