The concepts of matter-element space and matter-element distance are defined, the classification of matters is given as well.
本文定义了物元空间和物元距离的概念，给出了事物的分类方法。
Information matter element as an special matter element has extensibility and can form extensive information space.
信息物元作为一种特殊的物元具有可拓性，从而能形成可拓信息空间。
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