The Future: XHTML Basic
XHTML Basic is defined by the World Wide Web Consortium, as a subset of XHTML designed specifically for small devices such as mobile phones that can't support the full functionality of XHTML.
XHTML Basic is the basis for the specifications for both WAP2 and enhanced i-mode in the future. There are already announcements from the leading mobile Microbrowser vendors to include support for XHTML Basic in their future versions. It is assumed that XHTML Basic will be the common mobile markup language, unifying the WAP and i-mode camps.