The creation of the attribute classificationsystem 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 ClassificationSystem, or NAICS) identifying which industry sector they fit in to.
The problems of the present classificationcodesystem are analyzed. The unit-type general structure system and the treatment of implication factors are proposed in this paper.