Big Picture
For JRE 1.5, Sun has included with the JRE new, standardized versions of the XML APIs. These APIs are available for JRE 1.4 via jars that can be downloaded and installed into JRE 1.4.
uPortal 2.5 will standardize upon and use the APIs.
What specific APIs are we talking about
What about our legacy APIs?
IPortalDocument, PortalDcoumentImpl, and the uPortal DocumentFactory API become formally deprecated by this change. Instead, code using XML functionality in uPortal 2.5 should move to use the new standard XML APIs.