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CODEN是一种国际上通用的识别连续出版物和专著的字母数字式代码,由美国试验与材料学会(ASTM)在1963年制定、用于识别科技出版物。以后,美国化学学会(ACS)在ASTM5位CODEN代码(前4个数字常取自题名,第5个字母是任意选定的)的基础上增设一个校验码,用以提高计算机处理的准确性,并扩大代码的容量,校验码由字母A-Z和数字0-1充当,为避免同字母“I”与“O”相混,数字中不包括“1”与“0”。从1975年起,ACS下属的化学文摘服务社(CAS)的国际CODEN中心负责对世界各国期刊进行审批分配CODEN。目
CODEN is an internationally accepted alphanumeric code for identifying serial and monographs developed by the American Society for Testing and Materials (ASTM) in 1963 to identify scientific publications. Later, the American Chemical Society (ACS) added a verification code based on the ASTM 5-digit CODEN code (the first four digits are usually taken from the title and the fifth letter is arbitrarily selected) to improve the accuracy of computer processing , And expand the capacity of the code. The check digit is acted on by the letters AZ and numbers 0-1. To avoid the mismatch between the letters “I” and “O”, the numbers do not include “1” and “0”. Since 1975, the International CODEN Center of the Chemical Abstracts Service (CAS) affiliated with ACS is responsible for the approval of CODEN for journals in different countries. Head