Codiceappalti.it W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Start tag “head” seen but an element of the same type was already open.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “rel” not allowed on element “ul” at this point.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Empty heading.
This document appears to be written in Italian. Consider adding “lang="it"” (or variant) to the “html” start tag.
Italy IT