While DAISY 2.02 is a stable recommendation, it does not reflect advancements in the technology upon which it is based. DAISY is dependent upon recommendations established by the World Wide Web Consortium (W3C). DAISY 2.02 is based upon the XHTML recommendation; whereas the DAISY/NISO Standard is based on a book oriented XML tag set.
What is important to remember is that a valid 2.02 DTB is future safe because it can be updated using tools under development that are based upon standards accepted worldwide.
At this time, a migration path is being established. A DAISY upgrade system requires that the content be examined by several pieces of software. The path would look something like this: