Baru saja saya temukan tentang kriteria untuk memperoleh ISSN. Media online bisa memperoleh ISSN.
http://www.issn.org:8080/English/pub/faqs/issn How can I obtain an ISSN for my publication(s)? You should first check whether your publication is a serial. You should then contact the ISSN national Centre of your country or the ISSN International Centre if your country has no such Centre. If the publication is published by an international organisation, you should contact the ISSN International Centre. You will be asked to fill in a form requesting basic bibliographical information about the publication. Are ISSN assigned to electronic publications ? Yes, ISSN are assigned to electronic publications. An ISSN can be assigned to any serial publication, whether it is printed or available on any other medium (CD-ROM, floppy disk, online publications). The fundamental criteria which define a serial publication are, that its component parts are published as an open set of documents under the same title for a period of time which is not limited in advance.
