Unidom (UNIfied Domain Object Model) is a series of domain model engines. The Inventory domain model engine includes the Serialized Inventory Item, the Grouped Inventory Item, the Lot, and the Inventory Item Variance models. Unidom (统一领域对象模型)是一系列的领域模型引擎。库存领域模型引擎包括序列化库存项、分组库存项、批量和库存项变化的模型。