Errors:
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “version” attribute on the “html” element is obsolete. You can safely omit it.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
Attribute “about” not allowed on element “meta” at this point.
Attribute “datatype” not allowed on element “meta” at this point.
Duplicate ID “header”.
Element “input” is missing required attribute “alt”.
Bad value “/search/advanced?f[0]=im_field_topics:81281” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
The element “button” must not appear as a descendant of the “a” element.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
No “p” element in scope but a “p” end tag seen.
Element “p” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
End tag “div” seen, but there were open elements.
Unclosed element “h3”.
Saw U+0000 in stream.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “footer”.
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
The first occurrence of ID “header” was here.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “footer” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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