How doi is assigned to a Journal?

Best regard

How doi is assigned to a journal ?

I have assigned doi to articles from the Journal, but I could not generate the xml because I do not understand how I allocate Doi Journal as the field to place the suffix and prefix in the details 1.1 did not appear module. How do you turn ?

No hablo inglés, he traducido todo en google.

Un saludo

Have you configured the DOI Public Identifier plugin?

User Home → Journal Manager → System Plugins → Public Identifier Plugins → DOI → Settings

Área personal → Gestor/a de la revista → Módulos del sistema → Módulos de identificador público → Identificador de objeto digital (DOI) → Configuración