适用于各种书面文件，例如手稿、印刷品、书籍、期刊文章、使用说明和标准。如果能够澄清各个部门和分部的顺序、重要性和相互关系，则建议对部门和分部进行编号简化文本中某些段落的搜索和检索；-可以引用文本的单个部分；-促进书面作品中的参考文献。

Applies to all kinds of written documents, for example manuscripts, printed works, books, journal articles, directions for use and standards. Numbering of divisions and subdivisions is advocated if this - clarifies the sequence, importance and interrelation of individual divisions and subdivisions; - simplifies search and retrieval of certain passages in the text; - makes possible the citation of single parts of the text; - facilitates references within a written work.