import { NamedNode } from 'rdf-js';
declare const _default: {
    AudiobookFormat: NamedNode<"http://schema.org/AudiobookFormat">;
    EBook: NamedNode<"http://schema.org/EBook">;
    GraphicNovel: NamedNode<"http://schema.org/GraphicNovel">;
    Hardcover: NamedNode<"http://schema.org/Hardcover">;
    Paperback: NamedNode<"http://schema.org/Paperback">;
};
export default _default;
export declare type BookFormatType = NamedNode<'http://schema.org/AudiobookFormat'> | NamedNode<'http://schema.org/EBook'> | NamedNode<'http://schema.org/GraphicNovel'> | NamedNode<'http://schema.org/Hardcover'> | NamedNode<'http://schema.org/Paperback'>;
