import { GlossaristModel } from './base.js';
import { ConceptRef } from './concept-ref.js';
import type { ConceptRefJson } from './concept-ref.js';
import type { LocalizedString } from './generic-member.js';
export declare const RELATIONSHIP_TYPES: ReadonlyArray<string>;
export type RelationshipType = string;
export interface RelatedConceptJson {
    type?: RelationshipType;
    content?: LocalizedString | string | null;
    ref?: ConceptRefJson | ConceptRef | null;
    /**
     * Explicit cross-dataset link URL authored in the YAML data.
     *
     * MECE boundary: `ref` is the canonical, deployment-independent
     * reference ({source, id}). `target` is an author-provided URL for
     * cases where the dataset explicitly records a resolved link (e.g.
     * supersedes links to external standards). The resolver layer
     * computes runtime URIs from `ref`; `target` is not computed —
     * it is data.
     */
    target?: string | null;
}
export declare class RelatedConcept extends GlossaristModel {
    readonly type: RelationshipType;
    readonly content: LocalizedString | null;
    readonly ref: ConceptRef | null;
    readonly target: string | null;
    constructor(data?: RelatedConceptJson);
    /**
     * Convenience reader: returns the first available string value from
     * the localized hash, or null if absent.
     */
    get contentString(): string | null;
    toJSON(): RelatedConceptJson;
    static identityOf(value: {
        type?: string;
        ref?: {
            source?: string | null;
            id?: string | null;
        } | null;
        target?: string | null;
    } | null | undefined): string;
    identity(): string;
    static fromJSON(data: RelatedConceptJson): RelatedConcept;
}
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