export declare const KNOWN_VOCABULARIES: {
    [prefix: string]: string;
};
export interface HtmlValueMap {
    [tagName: string]: (baseUrl: string, attrs: any) => string | undefined;
}
export declare const HTML_VALUE_MAP: HtmlValueMap;
export interface HandlerContext {
    tagName: string;
    text: string;
    flags: number;
    id?: string;
    scriptType?: string;
    rdfaTextProperty?: string[];
    microdataTextProperty?: string[];
}
export declare const HandlerFlags: {
    hasLang: number;
    rdfaLink: number;
    rdfaNode: number;
    rdfaVocab: number;
    microdataNode: number;
    microdataVocab: number;
    microdataScope: number;
};
export interface ResultTwitter {
    card?: string;
    site?: string;
    'site:id'?: string;
    creator?: string;
    'creator:id'?: string;
    description?: string;
    title?: string;
    image?: string;
    'image:alt'?: string;
    player?: string;
    'player:width'?: string;
    'player:height'?: string;
    'player:stream'?: string;
    'app:name:iphone'?: string;
    'app:id:iphone'?: string;
    'app:url:iphone'?: string;
    'app:name:ipad'?: string;
    'app:id:ipad'?: string;
    'app:url:ipad'?: string;
    'app:name:googleplay'?: string;
    'app:id:googleplay'?: string;
    'app:url:googleplay'?: string;
    [key: string]: string | undefined;
}
export interface ResultDublinCore {
    title?: string;
    date?: string;
    'date.issued'?: string;
    'date.modified'?: string;
    [key: string]: string | undefined;
}
export interface ResultSailthru {
    title?: string;
    description?: string;
    author?: string;
    tags?: string;
    date?: string;
    expire_date?: string;
    'image.full'?: string;
    'image.thumb'?: string;
    location?: string;
    price?: string;
    [key: string]: string | undefined;
}
export interface ResultJsonLd {
    [key: string]: any;
}
export interface ResultApplinks {
    'ios:url'?: string;
    'ios:app_store_id'?: string;
    'ios:app_name'?: string;
    'iphone:url'?: string;
    'iphone:app_store_id'?: string;
    'iphone:app_name'?: string;
    'ipad:url'?: string;
    'ipad:app_store_id'?: string;
    'ipad:app_name'?: string;
    'android:url'?: string;
    'android:package'?: string;
    'android:class'?: string;
    'android:app_name'?: string;
    'windows_phone:url'?: string;
    'windows_phone:app_id'?: string;
    'windows_phone:app_name'?: string;
    'windows:url'?: string;
    'windows:app_id'?: string;
    'windows:app_name'?: string;
    'windows_universal:url'?: string;
    'windows_universal:app_id'?: string;
    'windows_universal:app_name'?: string;
    'web:url'?: string;
    'web:should_fallback'?: string;
    [key: string]: string | undefined;
}
export interface ResultHtml {
    date?: string;
    keywords?: string;
    author?: string;
    description?: string;
    language?: string;
    generator?: string;
    creator?: string;
    publisher?: string;
    robots?: string;
    viewport?: string;
    'application-name'?: string;
    'apple-mobile-web-app-title'?: string;
    title?: string;
    canonical?: string;
    amphtml?: string;
    [key: string]: string | undefined;
}
export interface Alternative {
    type: string;
    href: string;
    title?: string;
    media?: string;
    hreflang?: string;
}
export interface Result {
    alternate: Array<Alternative>;
    jsonld?: ResultJsonLd | ResultJsonLd[];
    rdfa?: ResultJsonLd;
    microdata?: ResultJsonLd;
    applinks?: ResultApplinks;
    twitter?: ResultTwitter;
    dublincore?: ResultDublinCore;
    sailthru?: ResultSailthru;
    html?: ResultHtml;
}
export interface Options {
    url: string;
}
export declare class Handler {
    protected callback: (err: Error | null, result: Result) => void;
    protected options: Options;
    protected result: Result;
    protected contexts: HandlerContext[];
    protected langs: string[];
    private _rdfa;
    private _rdfaNodes;
    private _rdfaVocabs;
    private _rdfaRels;
    private _microdata;
    private _microdataRefs;
    private _microdataScopes;
    private _microdataNodes;
    constructor(callback: (err: Error | null, result: Result) => void, options: Options);
    onend(): void;
    onerror(error: Error): void;
    onopentagname(tagName: string): void;
    onopentag(tagName: string, attributes: {
        [attribute: string]: string;
    }): void;
    ontext(value: string): void;
    onclosetag(): void;
    private _addMicrodataProperty(node, id, itemprop, value);
    private _setMicrodataProperty(node, id, key, value);
    private _addRdfaProperty(node, property, value);
    private _normalizeRdfaProperty(propertyList);
    private _createRdfaResource(id?);
}