XHTML

Extensible Hypertext Markup Language (XHTML), or simply XTML, is a markup language that has the same expressive possibilites as HTML, but conforms to the XML standard which is more strict. XHTML has been recommended by the World Wide Web Consortium (W3C) since January 26, 2000.

XHTML is regarded as the next version of HTML. The need for a more strict version of HTML was felt primarily as now web content needs to be delivered to many other devices (like mobile devices) apart from traditional computers, where extra resources cannot be devoted to support the generosities of HTML (for example, support for both upper-case and lower-case elements). The XHTML DTD is defined within the XML DTD to enforce the strict rules of XML.

Most of the recent versions of popular web browsers render XHTML properly, and many older browsers will also render XHTML as it is mostly a subset of HTML and most browsers do not require valid HTML. Similarly, almost all web browsers that are compatible with XHTML also render HTML properly. Some say this is slowing the switch from HTML to XHTML.

XHTML's true power is realized when used in conjunction with Cascading Style Sheets. Although HTML can be used with CSS, XHTML moves to force its use for layout and style. This makes the separation of content and form an integral part of the web page's code.

The changes from HTML, to transitional XHTML, are minor, and are mostly just in conformance with XML. The most important change is the requirement that all tags are well-formed. Additionally, in XHTML, all elements must be lowercased. This is in direct contrast to HTML 4.0, which prefers that elements are uppercased. In XHTML, all attributes, even numerical ones, must be quoted. Attribute minimization (i.e., <table border>) is also prohibited. More differences are detailed at the W3C XHTML specification.

Versions of XHTML

; XHTML 1.0 Transitional : Basically HTML 4.0 with XML conformance. Intended for easy migration ; XHTML 1.0 Strict : Separates the content from layout markup ; XHTML 1.0 Frameset : For splitting the browser window into several frames ; XHTML 1.1 : Module-based XHTML; authors can import additional features (such as framesets) into their markup

Work on XHTML 2.0 is still underway.

External Links



In the News

Moderate Exercise Yields Big Benefits
What's the key to looking and feeling better and enhancing your health? Exercise. Moderately strenuous exercise, about 30 minutes a day, can lead to enormous benefits in terms of your mood, health, weight and the ability to live an independent and fulfilling life. The exercise doesn't need to be athletic or difficult. Studies have shown that simply walking at a brisk pace for 30 minutes or more on most days can lead to significant health improvements. Add simple strengthening exercises two or three times a week and the benefits are even greater.

Nicotine Creates Stronger Memories, Cues To Drug Usehttp://feeds.scien

Resurrecting Pluto
As Sciencebase reported recently, a session of the International Astronomical Union (IAU), meeting in Prague, during August passed a resolution re-defining the nature of the planets of our solar system. Apparently, only about 428 of the IAU's almost 10000 membership was involved in the voting. The original proposal would have ...

[Funny] A referee has sent himself off in an English amateur league ma
Andy Wain had to abandon the Sunday league match between Peterborough North End and a Royal Mail side in the 63rd minute after throwing down his whistle and marching up to confront North End's keeper.

Self-cannibalizing cancer cells targeted
Scientists have embarked on a major new project to unravel the secret lives of cancer cells that go dormant and self-cannibalize to survive periods of stress. The work may help produce new cancer therapies to stem changes that render cancer cells dangerous and resistant to treatment.

[Ironic] An Italian pensioner committed suicide after his wife fell in
Recalling the end of Romeo and Juliet, the 70-year-old man, Ettore, who had sat by his wife's bedside for four months after she slipped into a coma following a heart attack, finally gave up hope and gassed himself in the garage of his family home.Less than a day later, his wife, Rossana, woke up in her hospital bed in Padua and immediately asked for him.

[Odd] A Romanian couple has named their son Yahoo as a sign of gratitu
Daily Libertatea said on Thursday Cornelia and Nonu Dragoman, both from Transylvania, met and decided they were meant for each other following a three-month relationship over the net.They married and had a baby this Christmas, whom they decided to name after one of the worldwide web's most popular portals."We named him Lucian Yahoo after my father and the net, the main beacon of my life,"Cornelia Dragoman was quoted as saying.

Symphony Of Colours In The Tarantula
The Tarantula Nebula is the most vigorous star forming region known in the local Universe. Using the power of the freely available ESA/ESO/NASA Photoshop FITS Liberator package a young amateur astronomer has created an amazing panorama of the centre of the Tarantula.

National Flag Day of Canada, February 15 /Jour du Drapeau du Canada, L
The maple leaf flag was raised for the first time on Parliament Hill in Ottawa on February 15, 1965, as the national flag of Canada. This annual holiday has been celebrated since 1996. Includes a history of the flag, flag facts, a quiz, and PDF versions of the Proclamation of the National Flag of Canada and the Declaration of National Flag Day ("suitable for display and/or framing"). In English and French. From Canadian Heritage.

Artificial Butterfly: Wing Scales Provide Template For Complex Photoni
By replicating the complex micron- and nanometer-scale photonic structures that help give butterfly wings their color, researchers have demonstrated a new technique that uses biotemplates for fabricating nanoscale structures that could serve as optical waveguides, optical splitters and other building blocks of photonic integrated circuits.




MP3 Music Downloads

Preview songs, Download Free Music,Burn CDs at ITunes.com
iTunes_RGB_9mm

 


Google




InformationQuickFind.com - Find Information Fast

Links | Privacy Policy | News |