Is DOI and ISBN the same?

DOI and ISBN are two different identification numbers and can not be translated into each other. A (digital) book need not have a DOI number, and e.g. a journal article that has a DOI need not have an ISBN number.

How do I use ISSN?

The ISSN Standard, ISO 3297:2007, provides internationally accepted recommendations to use ISSN as suffix for title-level DOIs: “To construct a DOI suffix using an ISSN, precede the ISSN (including the hyphen) with the lowercase letters “issn” and a period”.

Is ISSN the issue number?

The ISSN identifies the title of a serial and stays the same from issue to issue unless the title changes, at which point a new ISSN needs to be assigned.

Do I need an ISSN number?

Do I Need a Separate ISSN for Each Issue? No. ISSN are assigned to the entire serial and stay the same from issue to issue unless you change the title of your serial in any way except to increment the date (e.g., The World of Serials 1996 to The World of Serials 1997).