4.3. Publication types
ISO standards can be obtained from ISO members, a list of which is available from the ISO website
According to these standards and agreements, publications can be divided into two major categories: monographs and continuing resources.
Pursuant to ISO 2108:2005 (ISBN), monographs are non-serial publications, which may be complete in one volume or intended to be complete in a limited number of separate volumes, which may or may not be published simultaneously, and made available to the public in any product format (hardback, paperback, audiobook on cassette, CD, DVD, Braille book, website, electronic book, etc.).
Monographs in several volumes consist of a predetermined number of physically separate parts (separate volumes), with the exception of publications in instalments. They are intended to form or are published as a complete work. The separate parts may have their own title and statement of responsibility.
Each monograph is identified by an international standard book number (ISBN) (see Section 4.4.1).
Each continuing resource is identified by an international standard serial number (ISSN) (see Section 4.4.2).
Some serial publications, such as yearbooks and monographic collections, can also be considered as monographs for certain purposes, such as marketing. It must be possible to purchase them either individually or through a subscription.
These publications must be considered first and foremost as serial publications and be assigned an ISSN. They are then assigned an ISBN as monographs.