Received during the UBL 2.5 CSD02 public review (https://groups.oasis-open.org/discussion/fwd-tc-comment-list-comments-on-ubl-v25-csd02-from-coordination-office-for-it-standards-germany):

https://docs.oasis-open.org/ubl/csd02-UBL-2.5/UBL-2.5.xml#S-MINOR-REVISION-UBL-2.4:
 i.     Issue: "Because it preserves backward compatibility with UBL 2.3, UBL 2.2, UBL 2.1, and UBL 2.0, UBL 2.5 is technically a minor release,"

ii.     I think it might read "Because it preserves backward compatibility with UBL 2.3, UBL 2.2, UBL 2.1, and UBL 2.0, UBL 2.4 is technically a minor release,"