import { AbstractModel } from './abstract-model';
import { UUID } from '@heduapp/book-objects/business-object/abstract-business-object';
export interface IMetaInformation {
    book: string;
    chapter: string;
    problem: string;
    type: string;
}
export declare enum RelationTypes {
    SIMILAR = "SIMILAR",
    PROPAEDEUTIC = "PROPAEDEUTIC",
    ADDITIONAL_MATERIAL = "ADDITIONAL-MATERIAL"
}
export declare class ContentLeafRelation extends AbstractModel {
    contentLeafChainIdSource: UUID;
    contentLeafChainIdTarget: UUID | null;
    meta: IMetaInformation | null;
    type: RelationTypes;
    static tableName: string;
    static jsonAttributes: string[];
}