Hello,
Using Aspose Words and PDF we saw that both APIs create files EPUB 2 and not EPUB 3.
We found these posts that explain that the support of EPUB 3 is not expected:
- epub - Is there any way to convert epub2 to epub3 using Python? - Stack Overflow
- Convert Word Document to EPUB 3.0 File Format C# .NET Java
Have you got any news?
Is there a release plan?
Thanks,
Giulio