The paper is to explore Micro-blog's features, namely, whether it belongs to Document, the paper makes comparisons on definition, elements, information processing level, similarities and differences of ten documentary information sources, features and functions between Document and Micro-blog. The paper is through literature investigation or through network research referring to Document's and Micro-blog's various features and functions. The paper concludes that Micro-blog belongs to Document. And its development and growing trend should be paid more attention. The paper is to make suggestions for Microblog's future development and management combining analysis of traditional document restrictions.
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