The release note document describes what has change in each new version of Open Inventor:
Each release note also includes a "Compatibility notes" section. It describes the API differences between a new version of Open Inventor and its previous version. Any API change that may impact the compilation of your application code are mentionned. The following changes are mentionned in the compatibility section:
The following changes are not mentionned in the compatibility paragraph:
List of release notes per version of Open Inventor: