×××图书馆××同志:你好！我近来业务上有新体会写出来请教。今年2月,北图外文采编部征集我们近三年写的图书馆学论著,未发表的也要,以便复印若干份成为集子,交流工作经验。图书分类学方面我有五篇,三篇已在东北发表,两篇未发表的都是写给《中国法》编委会的:1986年《中图法哲学流派类目初探》和1988年《关于乐谱类目的通信》。我整理重抄时才发现这五篇文观点前后一贯,即重视互见类号的运用。上述那两篇指明一个主题一个方面内容的文献,必要时写互见类号,归入两、三个类目。已发表的《论两三个主题图书的分类标引》、《论一个主题多方面图书的分类标引》等,指明对多主题多方面内容的图书也要注意使用互见类号。例如哲学家著作一般是一个主题的,就有按国别分和按哲学流派分两种分类属性,要用互见类号。乐谱一般也是一个主题的,也有 × × × × Comrade: Hello! I recently wrote a new experience in business to ask advice. In February this year, the Department of Foreign Languages ​​and Collections of Beitou solicited us for a collection of books on library science that we wrote in the past three years. Unpublished articles have also to be printed in order to make copies and share work experience. In taxonomy of books, I have five articles, three have been published in the Northeast, and two unpublished articles have been written to the Editorial Board of the “Chinese Law.” In 1986, About Music Score Communication. “ When I finished the reorganization, I found that the five articles consistently followed the same point of view, that is, I attached importance to the application of the mutual class number. The above two articles indicating one aspect of a subject, if necessary, write an inter-class number and fall into two or three categories. Published ”On the classification of two or three themed book index“, ”On a topic in many aspects of the classification of books," and so on, indicating multi-subject multi-faceted content should also pay attention to the use of mutual class number. For example, a philosopher’s book is generally a subject. There are two types of categorization by country and philosophical genre. Sheet music is generally a theme, there are