The question information description model and the design issue tracking system function model are designed. Then the PCDITS architecture is proposed.
根据一般问题的处理过程分析了问题跟踪管理需求，设计问题跟踪系统的功能模型、问题信息描述模型。
Service description entities are a category of metadata in the information model maintained by Service Registry that includes physical documents, logical derivations and generic objects.
服务描述实体是Service Registry提供的信息模型中的一个元数据类别，其中包括物理文档、逻辑派生和一般对象。
The description process for part information is the establishing process for part model.
对零件信息的描述过程就是零件模型的建立过程。
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