Errors:
Legacy doctype. Expected “<!DOCTYPE html>”.
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The “version” attribute on the “html” element is obsolete.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The “profile” attribute on the “head” element is obsolete.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.
A “charset” attribute on a “meta” element found after the first 1024 bytes.
A document must not include more than one “meta” element with a “charset” attribute.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “seamless” not allowed on element “iframe” at this point.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “for” attribute of the “label” element must refer to a non-hidden form control.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Empty heading.
This document appears to be written in Dutch. Consider adding “lang="nl"” (or variant) to the “html” start tag.
Netherlands NL