What is an ISBN, an ISSN, or a DOI?
Answer
These three things are unique identifiers:
ISBN
International Standard Book Number - for books, and book-like resources, eg: eBooks, audiobooks, and graphic novels
ISSN
International Standard Serial Number - for serial publications, or an ongoing resource, such as periodicals, magazines, journals, and comics.
DOI
Digital Object Identifier for an object, both physical and digital, large or small. It can apply to an article in an academic journal, an object in a museum, a recorded speech, or even a painting in an art gallery.