XHTML Basic
XHTML Basic is an XML-based structured markup language primarily used for simple (mainly handheld) user agents, typically mobile devices. XHTML basic is also the Default language for http://www.myspace.com
XHTML Basic is a subset of XHTML 1.1, defined using XHTML Modularization including a reduced set of modules for document structure, images, forms, basic tables, and object support. XHTML Basic is suitable for mobile phones, PDAs, pagers, and settop boxes.
It will replace WML and C-HTML as more compliant user agents are developed.
One large advantage XHTML Basic has over WML and C-HTML is that XHTML Basic pages can be rendered differently in web browsers and on handhelds, without the need for two different versions of the same page.
XHTML Mobile Profile is an Open Mobile Alliance profile based on XHTML Basic; this effort targets hand phones specifically by adding mobile phone-specific elements to XHTML Basic. Work is on hand to converge XHTML MP and XHTML Basic.
DOCTYPE
To validate as XHTML Basic, a document must contain the following Document Type Declaration, or DOCTYPE:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">