Codelist Issue 54 for ONIX 3.0 has been released.* Complete listings of the ONIX codelists in PDF and HTML formats can be downloaded from the EDItEUR website:

Issue 54 stand-alone codelist documentation as readable PDF or HTML file (open and read it in your web browser)
Issue 54 TXT, CSV, XML, JSON files for loading into your data management applications
Issue 54 XSD, RNG, DTD schema modules for use with existing XML schema files (but note that it is better to download the latest 3.0.8 schemas since they incorporate a couple of small improvements as well as the new Block 8)
The ‘strict’ XSD 1.1 with Issue 54 (the strict XSD must be updated each time there is a new issue of the codelists, as It includes some codelists within the XSD itself)
The online browser for the ONIX code lists at ns.editeur.org/onix has been updated to issue 54

Need help finding and using the documentation? Read this.

It should go without saying that everyone should review the document summarizing the changes and update their systems, but we've highlighted some changes of particular note for you below.

List 21 Edition type

Code: PBO
Label: Paperback original
Note: A product published in any form of soft cover, that at the time of publication, has or had no counterpart in any other format, and that is or was not expected to have such a counterpart for a reasonable time (recommended at least 30 days following publication). For use in ONIX 3.0 only.

List 23 Extent type

Code: 17
Label: Number of cards
Note: In a pack of educational flash cards, playing cards, postcards, greeting cards etc. For use in ONIX 3.0 only.

List 24 Extent unit

Code: 00
Label: Physical pieces
Note: For example a count of the individual number of cards in a pack. For use in ONIX 3.0 only.

List 175 Product form detail

The changes made to this list include the addition of multiple audio codes to support average bit rate e.g. of an mp3 or AAC audio files, codes to describe aspect ratio — useful for fixed format digital books, and the following code:

Code: B520
Label: Rounded corners
Note: Usually die-cut rounding to foredge corners of cover (and/or to foredge page corners). See B212 for elaborate die-cutting.

List 203 ONIX Adult Audience rating

Code: 08
Label: Content warning (abuse)
Note: The publisher warns the product includes content involving sexual or extreme domestic abuse (including both mental and physical abuse).

Code: 09
Label: Content warning (self-harm)
Note: The publisher warns the product includes content involving severe self-harm (including serious eating disorders).

*A note to ONIX 2.1 users

ONIX 2.1 users should note that codelist updates no longer apply to ONIX 2.1 and users should continue to use Issue 36. ONIX 3.0 code lists and schema modules no longer contain codes or lists unique to ONIX 2.1. You can still obtain the correct ONIX 2.1 schema and codelists from the Archived Previous Releases page.

BookNet Canada still recommends that you use and periodically update your copy of EDItEUR's best practices guide. It’s an essential ONIX 3.0 guide, but much of the information in it applies equally to ONIX 2.1.