The SOA solution stack, shown in Figure 2, is an SOA reference model depicting the conceptual (high level of abstraction) view of an SOA solution.

如图 2 中所示，SOA 解决方案堆栈是一个 SOA 参考模型，描述 SOA 解决方案的运行时概念视图。

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So, I think SOA 2.0 is an expansion of SOA across the end-to-end solution stack.

因此，我认为SOA 2.0是跨端到端的解决方案栈的SOA的扩展。

youdao

One such reference architecture is IBM's SOA solution Stack reference model (S3 [9], Figure 4), a 9-layer model that provides a detailed architectural definition of an SOA solution across all layers.

此类参考体系结构之一就是IBM的SOA Solution Stack Reference Model (S3[9]，图4)，这是一个分为9层的模型，可提供跨所有层的SOA解决方案的详细体系结构定义。

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