构建软件平台来实现企业范围重用策略，是主要问题之一。
One of the major concerns is the issue of building software platforms as a strategy to achieve reuse at the enterprise level.
除了简化元素嵌入，紧凑表达式也提供一种引用和重用策略表达式的方法。
Besides simplifying element nesting, compact expression also provides a way to reference and reuse policy expressions.
如果不将策略断言复制到使用它们的每个WSDL中，则很难跨多个服务重用策略断言。
Policy assertions cannot easily be reused across multiple services without copying them into every WSDL in which they are used.
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