The creation of the attribute classification system establishes an easier way to add new attributes without having to perform major code revisions.

属性分类系统的创建，建立了一个不用对代码进行大的修订就可以添加新属性的简便方法。

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Companies were all assigned a numerical Standard Industrial Classification (SIC) code (now North American industry Classification System, or NAICS) identifying which industry sector they fit in to.

每个企业都会有一个标准产业代码(SIC)(现为北美产业分类系统，简称NAICS)，用来确定各自属于哪个产业部门。

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The problems of the present classification code system are analyzed. The unit-type general structure system and the treatment of implication factors are proposed in this paper.

对现有的分类编码系统存在的问题进行了分析，提出了组合式总体结构及隐含要素的处理方法。

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