ZedAI or EPUB3 as a master format?
So, ZedAI is DAISYs proposed master format in a single-source publishing workflow. But as far as I can tell, you can't describe an audio book with ZedAI. So for narrated audio books (full-text or not), I fail to see how it can be used as the master format.
However, EPUB3 can be used as a master format for narrated audio books. So then I wonder, why not use EPUB3 as a master format for text-only books as well? What is there to gain from choosing ZedAI over EPUB3?
Is there any blog-posts or articles comparing EPUB3 and ZedAI? What are the advantages and disadvantages of choosing one or the other as a master format? In what situation would one choose one or the other?