Verifying and Addressing W3C Validity
One of the functions of the W3C is to maintain a set of standards that define valid code. You can visit the W3C Web site at http://w3c.org. Expression Web 4 is predisposed to meet those standards by writing valid HTML/XHTML code as required by the DOCTYPE declaration in the page, as you saw in the previous exercise. By ensuring that your page’s code complies with validity standards, you will automatically make sure that it renders as consistently as possible in various browsers, and you’ll also make it more understandable for search engines and alternative browsers.
Check page validity procedure
In this exercise, you will check the validity of the source code in the sample page, examine very old and invalid ...