This section is normative.
The XHTML 1.1 document type is a fully functional document type with rich semantics. It is not, however, as varied in functionality as the XHTML 1.0 Transitional or Frameset document types. These document types defined many presentational components that are better handled through style sheets or other similar mechanisms. Moreover, since the XHTML 1.1 document type is based exclusively upon the facilities defined in the XHTML Modules, it does not contain any of the deprecated functionality of XHTML 1.0 nor of HTML 4.0. Despite these exceptions, or perhaps because of them, the XHTML 1.1 document type is a solid basis for future document types that are targeted at varied user agent environments.
The XHTML 1.1 document type is made up of the following abstract modules: Structure, Basic Text, Hypertext, List, Applet, Presentation, Edit, BDO, Forms, Tables, Image, Image Map, Intrinsic Events, Metainformation, Scripting, Stylesheet, and Link as defined in [XHTMLMOD], and the Ruby Annotation module as defined in [RUBY]. There are no additional definitions required by this document type. An implementation of this document type as an XML DTD is defined in Appendix C.