Each new user of Echo Link must provide proof of license before access is granted.
Server side validation is performed by a web server, after input has been sent to the server.
Client side validation is performed by a web browser, before input is sent to a web server.
The formal approval successfully brought to a close more than two years of effort, and provided the infrastructure for trusted Web site identity on the Internet.
Then, in April 2008, the Forum announced version 1.1 of the Guidelines, building on the practical experience of its member CAs and Relying-Party Application Software Suppliers gained in the months since the first version was approved for use.
If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, Mobile OK content, or to find broken links, there are other validators and tools available.