After carrying out tests to update books on Amazon using the ONIX 2.1 used for EBSCO, adjustments were identified as necessary to make ONIX 2.1 compatible with the ONIX specifications used by Amazon.
ONIX Metadata Specification.pdf
<RecordReference>: up to 32 characters (recommended) - Amazon has successfully accepted Thoth's ID for book identification. However, it is recommended that when the book has an ISBN in EPUB format, the ReferenceID should ideally match the ISBN of the EPUB. This practice ensures consistency, as both the EPUB and cover files are advised to follow the same nomenclature as the ReferenceID.
<ProductIdentifier>: Ensure correct identification of EPUB version ISBN.
After carrying out tests to update books on Amazon using the ONIX 2.1 used for EBSCO, adjustments were identified as necessary to make ONIX 2.1 compatible with the ONIX specifications used by Amazon. ONIX Metadata Specification.pdf
<RecordReference>: up to 32 characters (recommended) - Amazon has successfully accepted Thoth's ID for book identification. However, it is recommended that when the book has an ISBN in EPUB format, the ReferenceID should ideally match the ISBN of the EPUB. This practice ensures consistency, as both the EPUB and cover files are advised to follow the same nomenclature as the ReferenceID.<ProductIdentifier>: Ensure correct identification of EPUB version ISBN.<EpubType>: Use code 029 (EPUB) instead of 002 (PDF) for Amazon compatibility. (List 10: Epublication type code)<NamesBeforeKey>and<KeyNames>tags are not accepted. It must be<PersonName>.<Subject>: Inclusion of keywords impacts book distribution in Amazon catalogues and search engines.<TextFormat>: Use code 02 for synopsis identification.<RelationCode>: Apply code 13 for epublication based on a printed product.<AvailabilityCode>: Use code IP for the book to be considered available.Example ONIX file with the indicated adjustments: here