自从文献问世以来,人们就已根据不同的需要,从不同的角度,按照文献的不同属性据以划分类型,从而形成了多种多样的文献类型划分方法,诸如按照出版者分,按情报加工层次分、按流通范围分、按发表与否分、按刊行数量分、按刊行方式分、按刊行时间分、按载体形式分、按所用符号系统分、按记录形态分、按报道和利用角度分,等等。这些文献类型划分方法,看来大多有它存在的理由,因为它们是从不同角度来看待文献,用之于不同场合的,在一定的条件下都有其一定的积极意义。近来有的同志在谈到这一问题时,只强调按照情报加工层次的一、二、三次文献分法,并认为这对于情报机构具有首要意 Since the advent of the literature, people have divided the types according to different needs, from different perspectives, and according to the different attributes of the documents, thus forming a variety of literature type classification methods, such as according to the publisher, according to intelligence processing level Points, according to the circulation of points, according to published or not, according to the number of points, according to the method of issuing points, according to the time of publication, according to the carrier form, according to the use of the symbol system points, according to record form points, according to points of view and utilization ,and many more. It seems that most of these document classification methods have their own reasons for existence because they treat the document from different perspectives and are used on different occasions and have certain positive meanings under certain conditions. When talking about this issue, some comrades have only recently emphasized that they should accord the first, second and third document classification according to the intelligence processing level and think this has the primary significance to intelligence agencies