Nowadays more and more users are accessing web services using mobile phones, therefore the wesites must be optimized for that.


Some of the main limitations when accessing a webpage from a mobile phone are:

  • Small screen size
  • Lack of windows - On a desktop computer, the ability to open more than one window at a time allows for multi-tasking. On mobile web, only one page can be displayed at a time.
  • Navigation - Mobile devices do not use a mouselike pointer
  • Types of pages accessible - Many devices cannot access pages with a secured connection, Flash or other similar software, PDFs, or video sites.
  • Speed - On most mobile devices, the speed of service is very slow


For this reason, a new domain namely ".mobi" was born.


.mobi (also known informally as dotMobi) is a top-level domain approved by ICANN and managed by the mTLD global registry dedicated to delivering the Internet to mobile devices via the Mobile Web. The  100% of .mobi sites must be optimized for viewing on a mobile phone. From the  users'  perspective, they are guaranteed a site optimized for their devices.

To develop mobile web sites, the Extensible HyperText Markup Language, or XHTML, is used. It is a markup language that has the same depth of expression as HTML, but also conforms to XML syntax.


Useful links for XHTML tutorials:




XHTML: example page

"http://www.wapforum.org/DTD/xhtml-mobile10.dtd" >
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<style type="text/css">
p {text-align: left }
p.big {font-size: 120%}
p.normal {font-weight: normal}</style>
<title>  XHTML TEST </title>
<p class = "big">Here goes the header<br />

<img src="images/mdd.jpg" width="145" height="123" alt="" />
<br />
<p class = "normal">
Test page </p>

Page validating

After developing the website, it can be tested and validated using some of the online validators. Here you find some links to them:




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Last update:06-02-2008