API Reference > presentation-common > PresentationRules > DEPRECATED_RelatedPropertiesSpecification > relatedClasses relatedClasses relatedClasses: MultiSchemaClassesSpecification | MultiSchemaClassesSpecification[] Specifications of related ECClasses. Optional if DEPRECATED_RelatedPropertiesSpecification.relationships is specified. Defined in presentation/common/src/rules/content/modifiers/RelatedPropertiesSpecification.ts Line 66 Last Updated: 13 June, 2024