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对上世纪国外相关度理论的研究发展进行梳理后,按照总体研究重心的转移,以1977年为界将其分为以系统为中心和以用户为中心两大阶段。同时,依据研究角度的差异,发现可以按照基础理论、类型、表示方法、判定方法、动态性、主观性控制六大支线分类组织相关度研究成果。纵观这两大时期、六条支线的发展,成果虽多,但仍有几处“硬伤”未解决。因此,建立一套完整、适用的相关度理论依然是21世纪信息检索和信息科学领域的重要课题。
After reviewing the research on the development of foreign relevance theory in the last century, according to the transfer of the overall research center of gravity, we divide it into two phases: system-centered and user-centered. At the same time, according to the difference of research perspectives, we find that the research results can be classified according to the six branches of basic theory, type, representation method, judging method, dynamics and subjectivity control. Looking at these two major phases, the development of the six sub-lines has achieved a great deal, but there are still a few “flawed” unsolved problems. Therefore, to establish a complete and applicable theory of relevancy remains an important issue in the field of information retrieval and information science in the 21st century.