A more people with the traditional paper publication ID marginsin, you can obtain by ID readers in electronic form (online version), and so the resources to take charge and free of charge, and so on.

• 一个较为人们所认同的方案是在传统的纸质出版物中附加ID，读者通过ID可以获取电子版(网络版)等资源，可采取免费和收费等方式。