一、书目情报的信息源流书目情报是一种不断发展的社会现象,其动力源于作为系统要素的文献、需求和技术。而三者又可归结为信息源流的变化。文献的大量存在是书目情报产生的前提,需求是书目情报发展的软环境,技术则是书目情报发展的显在推动因素。书目情报发展至今已形成一个包括目录、文摘、索引、简介、 First, the bibliographic information source Bibliographic information is a growing social phenomenon, its motivation stems from the system as a component of the literature, needs and technologies. The three can be attributed to changes in the source of information. The existence of a large number of documents is a prerequisite for bibliographic information generation, demand is the soft environment for the development of bibliographic information, and technology is the obvious driving factor for the development of bibliographic information. Bibliographic information has so far formed a catalog, abstracts, indexes, profiles,