在UML 2.0中，只定义了三个规范性层次，那些对应于分级语言单元的层已经在0层中就被提及并描述了。
In UML 2.0, only three levels of compliance are defined, and those correspond to the hierarchical language unit levels already mentioned and depicted in 0 earlier.
关于政策性银行的立法文件，也仅仅停留在政策层面和行政层面的低级水平，根本不具备法律层次的权威性、系统性和规范性。
The legal documents on policy-banks, has remained only at the policy level and the low rate of the administrative level, does not have the legal authority level, systematic and standardized.
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