API Reference > imodeljs-common > Entities > ElementProps > federationGuid federationGuid federationGuid: undefined | string A FederationGuid assigned to this element. note On insert, if this is a valid Guid, the value is preserved. If it is undefined, a new Guid is created. If it is an invalid Guid (e.g. Guid.empty), the resultant element will have a null federationGuid. For update, undefined means "don't change." Defined in core/common/src/ElementProps.ts Line 49 Last Updated: 11 June, 2024