API Reference > ecschema-Metadata > Metadata > Unit Unit Class Beta An abstract class that adds the ability to define Units and everything that goes with them, within an ECSchema as a first-class concept is to allow the iModel to not be dependent on any hard-coded Units Extends SchemaItem Methods Name Description constructor(schema: Schema, name: string): Unit fromJSON(unitProps: UnitProps): Promise<void> fromJSONSync(unitProps: UnitProps): void toJSON(standalone: boolean = false, includeSchemaVersion: boolean = false): UnitProps Save this Unit's properties to an object for serializing to JSON. Inherited methods Name Inherited from Description equalByKey(thisSchemaItem: SchemaItem, thatSchemaItemOrKey?: SchemaItem | SchemaItemKey): boolean Static SchemaItem Indicates if the two SchemaItem objects are equal by comparing their respective SchemaItem.key properties. parseFullName(fullName: string): [string, string] Static SchemaItem Parses the given full name, {schemaName}.{schemaItemName} or {schemaName}:{schemaItemName}, into two separate strings. Properties Name Type Description _definition Protected string _denominator Protected number _numerator Protected number _offset Protected number _phenomenon Protected undefined | LazyLoadedPhenomenon _unitSystem Protected undefined | LazyLoadedUnitSystem definition Accessor ReadOnly string denominator Accessor ReadOnly number numerator Accessor ReadOnly number offset Accessor ReadOnly number phenomenon Accessor ReadOnly undefined | LazyLoadedPhenomenon schemaItemType Readonly Unit unitSystem Accessor ReadOnly undefined | LazyLoadedUnitSystem Inherited properties Name Type Inherited from Description _description Protected undefined | string SchemaItem _key Protected SchemaItemKey SchemaItem _label Protected undefined | string SchemaItem description Accessor ReadOnly undefined | string SchemaItem fullName Accessor ReadOnly string SchemaItem key Accessor ReadOnly SchemaItemKey SchemaItem label Accessor ReadOnly undefined | string SchemaItem name Accessor ReadOnly string SchemaItem schema Readonly Schema SchemaItem Defined in core/ecschema-metadata/src/Metadata/Unit.ts Line 26 Last Updated: 29 November, 2022