W3C XHTML Activities
HTML is the lingua franca for publishing hypertext on
the World Wide Web.
XHTML is the latest version of HTML.
XHTML Tutorial
To see how this Web Site was converted to XHTML, read our XHTML
tutorial.
XHTML Versions
XHTML 1.0
XHTML 1.0 was released as a W3C Recommendation 20. January 2000.
XHTML 1.0 Second Edition
XHTML 1.0 Second Edition was released as a W3C Recommendation 1. August 2002.
It is not a new version, but an update and a "bug fix".
About XHTML 1.0
XHTML 1.0 was the first major change to HTML since 1997, and a very important
step on the way to create a standard that will provide richer web pages on a wider
range of user agents (browsers), like desktop PCs, mobile (wireless) devices,
and cell phones.
XHTML is an XML application with a clean migration path from HTML 4.01. W3C's
first step was to reformulate HTML 4.01 into XML, resulting in XHTML 1.0. XHTML
1.0 relies on HTML 4.01 for the meanings of HTML tags.
The next step includes modularization of XHTML into smaller element
collections, to make it easier to combine XHTML with other markup languages like
vector graphics and multimedia.
Modularization of XHTML also gives reduced development costs, improved
cooperation with other applications (like databases), easier communication with
different user agents (browsers), and cleaner integration between HTML and
different XML standards.
W3C XHTML Activities
XHTML 1.0
XHTML 1.0 is a reformulation of HTML 4.01 in XML.
To learn more about XHTML visit our XHTML
tutorial.
XHTML 1.1 (Modular XHTML)
Small devices (like mobile devices) cannot support all XHTML functions. XHTML 1.1 divides the specification into modules with limited
functionality. Small browsers can reduce their complexity by
supporting only selected modules (but once a module has been chosen, all of its
features must be supported).
XHTML 1.1 is a strict language. XHTML 1.1 is not backward compatible with HTML 4.
XHTML Basic
XHTML Basic is a small subset of XHTML 1.1. It contains only
basic XHTML features like text structure, images, basic forms, and basic
tables. It is designed for small browsers (like in handheld devices).
XHTML Events
With the support for the W3C Document Object Model level 2 in XHTML, event
handlers can be attached to XHTML elements so that parent elements can handle
events before and after child elements.
To learn more about the DOM, study our DOM tutorial.
XHTML Print
XHTML-Print is a part of XHTML 1.1 (Modular XHTML).
XHTML-Print is designed for mobile devices and low-cost printers that
generally print from top to bottom of a page with no printing buffer and without
a device specific printer driver.
XForms
With HTML forms, a user can visit a Web page, add information to the page,
and submit the page to a Web server.
XForms are the successors to HTML forms, providing a much richer and
presentation independent way of handling interactive Web transactions. Designed
to be integrated with XHTML, we can expect that future e-commerce applications
will demand the use of XForms.
To learn more about XForms, study our XForms tutorial.
XHTML Modularization
XHTML Modularization is about splitting XHTML 1.0 into a collection of small
modules that provide specific functionality.
Modularization of XHTML 1.0 is implemented using the XML DTD (Document Type
Definition)
Modularization of XHTML 2.0 will be implemented using XML Schemas.
To learn more about DTD, visit our DTD tutorial.
To learn more about XML Schemas, visit our Schema tutorial.
XHTML 2.0
XHTML 2.0 is a next generation markup language. The functionality is expected
to remain similar to XHTML 1.1, but the markup language may be altered to
conform to the requirements of XML standards like XML Linking and XML
Schema.
XLink
XLink is a language for creating hyperlinks in XML documents. XLink is
similar to HTML links - but it is a lot more powerful
XLink supports simple links (like HTML) and extended links (for linking multiple
resources together).
You can learn more about XLink in
our XLink tutorial.
HLink
HLink adds the ability to specify which attributes of elements represent
hyperlinks in XHTML, and specifies how hyperlinks should be traversed.
HLink is an extension to XLink.
W3C HTML Specifications and Timeline
W3C Reference:
W3C HTML Home Page
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