它以文献正文与引文之间的内在联系为纽带建立的新型索引关系———引文索引。利用这种索引关系 ,用户不仅可在短时间内从数以百万条计的引文中查询到科技文献被引用的详细情况 ,而且还可以从一篇早期的重要文献或著者姓名入手 ,检索到近期发表的相关文献。同其它检索方法相比 It takes the intrinsic relationship between the main body of the document and the citations as a link to establish a new index relationship --- Citation Index. Using this indexing relationship, users are not only able to access millions of citations in a short period of time to the details of scientific and technical literature citations, but also to retrieve from an earlier important document or author’s name Recently published relevant literature. Compared with other retrieval methods