- Defines a new XHTML document type
- based upon the module framework and modules defined in Modularization of XHTML
- serve as the basis for future extended XHTML 'family' document types
- removes the deprecated legacy functionality of HTML 4 that was brought forward into the XHTML 1.0 document types.
- Introduces a
Ruby module.
What is the difference between XHTML 1.0, XHTML Basic and XHTML 1.1?
The first step was to reformulate HTML 4 in XML, resulting in XHTML 1.0. By following the HTML Compatibility Guidelines set forth in Appendix C of the XHTML 1.0 specification, XHTML 1.0 documents could be compatible with existing HTML user agents.
The next step is to modularize the elements and attributes into convenient collections for use in documents that combine XHTML with other tag sets. The modules are defined in Modularization of XHTML. XHTML Basic is an example of fairly minimal build of these modules and is targeted at mobile applications.
XHTML 1.1 is an example of a larger build of the modules, avoiding many of the presentation features. While XHTML 1.1 looks very similar to XHTML 1.0 Strict, it is designed to serve as the basis for future extended XHTML Family document types, and its modular design makes it easier to add other modules as needed or integrate itself into other markup languages. XHTML 1.1 plus MathML 2.0 document type is an example of such XHTML Family document type.