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The XHTML modularization-model defines the modules of XHTML.

XHTML contains most of the functionality a web developer will need.

For some purposes XHTML is too large and complex, and for other purposes it's too simple.

By splitting XHTML into modules, the W3C (World Wide web Consortium) has created small and well-defined sets of XHTML elements that can be used separately for small devices, or combined with other XML standards in more complex applications.

With modular XHTML, designers can:

• Choose the elements to be supported by a device
• Simplify XHTML for small devices
• Extend XHTML for complex applications by adding new XML functionality (like MathML, SVG, Voice and Multimedia)
• Define XHTML profiles like XHTML Basic (a subset of XHTML for mobile devices)

Tutorial

• XHTML
• XHTML - Introduction
• XHTML - Why
• XHTML - vs HTML
• XHTML - Syntax
• XHTML - DTD
• XHTML - Validation
• XHTML - Modules
• XHTML - Summary

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