Products are usually organized into hierarchies for different purposes in order to provide different views into a set of products for different users. Example usages include.
为了向不同的用户提供产品集的不同视图，通常需要将产品按各种用途组织成不同的层次结构。
Second, it applies work product control by identifying a minimum set of work products that must be approved. Our enhancements to RUP include the following approvals
其次，它将识别出的必须批准的最小工作产品集用于工作产品控制。
The view a hierarchy provides on the products in a catalog provides a semantic on an otherwise unordered set of products. Typical hierarchies include the following.
层次结构提供的产品视图为原本无序的产品集提供语义。
The view a hierarchy provides on the products in a catalog provides a semantic on an otherwise unordered set of products. Typical hierarchies include the following.
层次结构提供的产品视图为原本无序的产品集提供语义。
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