databasedoi

maximum length of Digital Object Identifier?

I want to add a field to my database that stores DOIs. But I can't seem to find out what their maximum length is. Does anyone know if there is a maximum length?

Solution

  • never mind, I found it:

    https://www.doi.org/the-identifier/resources/handbook/1_introduction#1.6.3

    DOI names have two components, known as the prefix and the suffix. These are separated by a forward slash. The two components together form the DOI name:

    10.1000/123456

    In this example, the prefix is "10.1000" and the suffix is "123456".

    There is no technical limitation on the length of either the prefix or the suffix; in theory, at least, there is an infinite number of DOI names available.