Overview
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beyond a skeleton set were grouped into individual modules. User agent (UA)
developers could then decide which extensions to support. A simple user
agent can be considered a fully compliant user agent by supporting only the
Basic module, whereas a more powerful browser can support all the official
modules, as well as those developed by third parties.
Modularization is also intended to help content creators. As more and more
devices become web-enabled, the number of platforms a content creator will
be asked to support will become unreasonable. By dividing HTML up into
different ‘building blocks’ content creators can supply a minimal version of
their site for user agents that only support the Basic module, a moderate
version of their site for user agents who support the additional modules, and
a full version of their site for user agents that support the full range of the
XHTML specification.
Finally the X in XHTML was intended to help people who wish to extend
HTML. The use of XML brought a standard grammar with which they could
define their extension, and the modularization meant that their extension
would be just another module that a user agent developer or content creator
could choose to support. Additionally, since XHTML pages should state what
modules are required to accurately render them, the user agent software could
dynamically load a ‘plug-in’ that it could use to render a module that was
defined after the user agent had been originally released.
For more information, go to:
•HTML 4.0—http://www.w3.org/TR/1999/REC-html401-19991224
•XHTML™ 1.0—http://www.w3.org/TR/2002/REC-xhtml1-20020801
•XHTML™
Basic—http://www.w3.org/TR/2000/REC-xhtml-basic-20001219/
•XHTML™ 1.1—http://www.w3.org/TR/2001/REC-xhtml11-20010531/
•XHTML Tables Module -
XHTML™2.0—http://www.w3.org/TR/2004/WD-xhtml2-20040722/m
od-tables.html
For the purposes of this guide, it is assumed that you have experience in
HTML and XHTML programming or access to someone who has such
experience.
How to Create Applications
You can design the following examples of applications:
•Web browser