Mobile Web defined in terms of Markup Language

The ‘Mobile Web’ consists [ mostly ] of three types of Markup Language that we need to know about:

WML (often called WAP 1.0) - based on XML - a content formatting standard.

xHTML Mobile Profile (often called WAP 2.0) - derived from xHTML 1.1 Basic but with additional modules.

cHTML or Compact HTML (often called iMode) - uses a subset of the standard HTML 2.0, 3.2 or 4.0 specifications.

A page coded in one of the above Markup Standards would normally identify itself in the DTD. Mobile user agents (browser and crawler) will look for this ‘mobile’ page declaration. Example:

<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.1//EN" "http://www.openmobilealliance.org/tech/DTD/xhtml-mobile11.dtd">

Google Mobile Web crawls only content declared as mobile compliant - hence a different index and a different set of search results.

Google Web (on a mobile) uses the regular datacentre indexes - where results match the desktop.

mobile SEO