API Reference > imodeljs-backend > Relationships > PhysicalElementIsOfType PhysicalElementIsOfType Class Relates a PhysicalElement to its PhysicalType Extends GeometricElement3dHasTypeDefinition Methods Name Description constructor(id: string, relClassName: string = PhysicalElementIsOfType.classFullName): PhysicalElementIsOfType Inherited methods Name Inherited from Description toJSON(): RelatedElementProps GeometricElement3dHasTypeDefinition fromJSON(json?: RelatedElementProps): undefined | RelatedElement Static GeometricElement3dHasTypeDefinition idFromJson(json: any): string Static GeometricElement3dHasTypeDefinition Accept the value of a navigation property that might be in the shortened format of just an id or might be in the full RelatedElement format. Properties Name Type Description classFullName Static string Inherited properties Name Type Inherited from Description id Readonly string GeometricElement3dHasTypeDefinition The Id of the element to which this element is related. none StaticReadonly RelatedElement GeometricElement3dHasTypeDefinition Used to null out an existing navigation relationship. relClassName Readonly undefined | string GeometricElement3dHasTypeDefinition The full className of the relationship class. Defined in core/backend/src/NavigationRelationship.ts Line 150 Last Updated: 12 June, 2024