import type { EntityRef, EntityType, RefType, RetractRef, RetractType, ThingRef, TombstoneRef, TombstoneType } from 'types/index.js';
export declare const TombstoneRefTypeName: TombstoneType;
export declare const RetractRefTypeName: RetractType;
export declare const EntityRefTypeName: EntityType;
export declare const RefTypes: RefType[];
export declare function isThingRef(value: unknown): value is ThingRef;
export declare function isTombstoneRef(ref: unknown): ref is TombstoneRef;
export declare function isRetractRef(ref: unknown): ref is RetractRef;
export declare function isEntityRef(ref: unknown): ref is EntityRef;
export declare function tombstoneRef(id: string): TombstoneRef;
export declare function retractRef(id: string): RetractRef;
export declare function entityRef(id: string): EntityRef;
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