API Reference > presentation-common > PresentationRules > DEPRECATED_RelatedInstanceSpecification DEPRECATED_RelatedInstanceSpecification Interface Deprecated Use RelatedInstanceSpecificationNew. Will be removed in iModel.js 3.0 Deprecated RelatedInstanceSpecification specification. Properties Name Type Description alias string The alias to give for the joined related instance. class SingleSchemaClassSpecification Specification of the related instance class. isRequired undefined | boolean Is the related instance required to exist. relationship SingleSchemaClassSpecification Specification of the relationship to use for joining the related instance requiredDirection Forward | Backward Direction of the relationship Defined in presentation/common/src/presentation-common/rules/RelatedInstanceSpecification.ts Line 76 Last Updated: 11 June, 2024