API Reference > imodeljs-backend > Relationships > ElementRefersToElements ElementRefersToElements Class A Relationship where one Element refers to another Element Extends Relationship Extended by PhysicalElementFulfillsFunction DrawingGraphicRepresentsElement GraphicalElement3dRepresentsElement SynchronizationConfigProcessesSources ElementGroupsMembers Methods Name Description create<T extends ElementRefersToElements<T>>(iModel: IModelDb, sourceId: string, targetId: string): T Static Create an instance of the Relationship. insert<T extends ElementRefersToElements<T>>(iModel: IModelDb, sourceId: string, targetId: string): string Static Insert a new instance of the Relationship. Inherited methods Name Inherited from Description buildConcurrencyControlRequest(opcode: DbOpcode): void Relationship Add a request for the locks that would be needed to carry out the specified operation. delete(): void Relationship Delete this Relationship from the iModel. forEachProperty(func: PropertyCallback, includeCustom: boolean = true): void Relationship Call a function for each property of this Entity. insert(): string Relationship Insert this Relationship into the iModel. update(): void Relationship Update this Relationship in the iModel. getInstance<T extends Relationship<T>>(iModel: IModelDb, criteria: string | SourceAndTarget): T Static Relationship is(otherClass: undefined): boolean Static Relationship return whether this Entity class is a subclass of another Entity class onDeletedDependency(_props: RelationshipProps, _iModel: IModelDb): void Static Relationship Callback invoked by saveChanges on an ElementDrivesElement relationship when the relationship instance has been deleted. onRootChanged(_props: RelationshipProps, _iModel: IModelDb): void Static Relationship Callback invoked by saveChanges on an ElementDrivesElement relationship when its input has changed or is the output of some upstream relationship whose input has changed. Inherited properties Name Type Inherited from Description classFullName Accessor ReadOnly string Relationship Get the full BIS class name of this Entity in the form "schema:class". classFullName Accessor StaticReadOnly string Relationship Get the full BIS class name of this Entity in the form "schema:class" className Accessor ReadOnly string Relationship The name of the BIS class associated with this class. id string Relationship The Id of this Entity. iModel IModelDb Relationship The IModelDb that contains this Entity schema Static undefined Relationship The Schema that defines this class. schemaName Accessor ReadOnly string Relationship The name of the BIS Schema that defines this class sourceId Readonly string Relationship targetId Readonly string Relationship Defined in core/backend/src/Relationship.ts Line 83 Last Updated: 29 November, 2022