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XHTML Modules

An XHTML Module is designed in such a way that it can tell any browser how best to display site content, regardless of what kind of browser it is, and regardless of what kind of hardware requirements happen to limit the content in size and function. To make this easier, XHTML is currently partitioned into two module sections:

  • Abstract Modules— An abstract module defines a type of data that is distinct from others within the document type. One example of an abstract module would be frames, and another would be forms.

  • DTD Modules— A document type definition module details elements, attributes, and content declarations. In XHTML 1.0, there are only three DTDs. But modularization of XHTML enables the development of unique DTDs using a DTD module.


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