HTML5 Conformance Checker

html w3c-validation
Joel picture Joel · Oct 21, 2010 · Viewed 32.7k times · Source

I got the following warning using the W3C validator:

Using experimental feature: HTML5 Conformance Checker

What exactly does it mean? That I can't count on this validator?

Answer

Jo Sprague picture Jo Sprague · Oct 21, 2010

The warning "Using experimental feature: HTML5 Conformance Checker." means that the validator is checking your markup as HTML5, but since the w3c hasn't agreed on every part of the HTML5 standard, you should take what the validator says with a grain of salt, because it is prone to change until the standard is complete. The warning does not mean that there is anything wrong with your code, but if you want to get rid of the warning, try validating with a Doctype of "HTML 4.01 Strict".

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