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一、导言保留上下文索引系统(PR EserVed Context Index System,简称PRECIS)本质上是一种编制书本式字顺主题索引的方法,一般(但不一定)是由计算机协助的。书本式索引意味着索引采用版面的形式,不管这种版面是印在纸张上,还是摄制在缩微制品上或显示在计算机的终端上,后面两种形式现在变得越来越普通。PRECIS通常分成为两步:即每一款目跟着一个或几个地址(如分类号或索取号),这些地址指明相关的款目在另一个文档中的位置。
I. INTRODUCTION The PR EserVed Context Index System (PRECIS) is essentially a method of compiling a book-like theme index, generally (but not necessarily) computer assisted. The book index means that the index is in the form of a layout. Whether the layout is printed on paper, filmed on a microfilm or displayed on a computer terminal, the latter two forms are now becoming more commonplace. PRECIS is usually broken into two steps: one for each entry followed by one or more addresses (such as a classification number or accession number) that indicate the location of the relevant entry in another document.