许多分布式对象系统中的一个迫切需求就是能够为持续对象生成唯一全局标识。
A critical requirement in many distributed object systems is the ability to generate unique global identifiers for persistent objects.
UML是一种对分布式对象系统可视化，说明，构建以及记录的图形化定义语言。
UML is a specification that defines a graphical language for visualizing, specifying, constructing, and documenting the artifacts of distributed object systems.
与传统的分布式对象系统不同，BPEL4WS 实例不是通过工厂模式创建的。
Unlike traditional distributed object systems, in BPELWS instances are not created via a factory pattern.
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