增强了业务级别的策略管理(主要增加了策略表达能力)，改进了用于创建和管理策略的工具，以及更好地模拟了策略。
Enhanced business-level policy management focusing on increased expressiveness of policies, improved tooling for creating and managing policies, and better simulation of policies.
此外，递归函数也增强了语言的表达能力。
In addition, recursive functions add significant expressive power to the language.
出现了几种新的 XML 模式语言以替代或增强 DTD，其中包括 RELAX NG，它以简洁性和表达能力著称。
Several new XML schema languages have emerged to supplant or augment DTDs, including RELAX NG, which is renowned for its simplicity and expressiveness.
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