The issue number is based on the issue cycle. For example, if the periodical is a monthly magazine, it will issue 12 issues every year. For example, the periodicals issued in March 20 15 can be sorted into the third issue of volume 2, and the fourth issue of volume 2 issued in April 20 15 is called the fourth issue of volume 2.
The issue number is the next unit of the volume number, and the volume number contains the issue number.
Extended data:
In order to sort the periodicals for easy query, domestic periodicals are divided into volumes and issues according to time. Volume is the time classification above the cycle, volume is the number sorted by year since publication, and cycle is the number sorted by time this year.
For example, the papers published in March 2065438+2007 may be, according to the volume number and issue number, 23 volumes and 3 issues. The regulations on the volume number and issue number of periodicals in China are relatively uniform and easy to identify.
There is no uniform standard for the volume number and issue number of English periodicals. Generally speaking, foreign periodicals don't just take the year as the volume number. They can publish one book, several books or several books a year.
Therefore, English periodicals often only set volume numbers, not issue numbers. For example, an English periodical publishes a volume every half month, which is similar to that of China, so there is no issue number, and only the volume number is used to distinguish it.