What ePub specification is aspose.words outputting? If it is not ePub3 are there any plans to implement this in the future?
I endorse the urgent need to upgrade to epub3 support. It is becoming the format of choice for publishers and already well supported by iBooks, for example. http://www.bisg.org/what-we-do-12-152-epub-30-support-grid.php is a good reference on the current state of support and is regularly updated.
It is also particularly valuable for people with a reading impairment as it allows support for and integration with speech.