Libpng.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Internal encoding declaration “iso-8859-1” disagrees with the actual encoding of the document (“utf-8”).
Bad value “text/html; charset=iso-8859-1” for attribute “content” on element “meta”: “iso-8859-1” is not a preferred encoding name. The preferred label for this encoding is “windows-1252”.
Element “link” is missing one or more of the following attributes: “itemprop”, “rel”.
The “rev” attribute on the “link” element is obsolete. Use the “rel” attribute instead, with a term having the opposite meaning.
The “bgcolor” attribute on the “body” element is obsolete. Use CSS instead.
The “text” attribute on the “body” element is obsolete. Use CSS instead.
The “link” attribute on the “body” element is obsolete. Use CSS instead.
The “vlink” attribute on the “body” element is obsolete. Use CSS instead.
The “align” attribute on the “h1” element is obsolete. Use CSS instead.
The “align” attribute on the “h2” element is obsolete. Use CSS instead.
The “center” element is obsolete. Use CSS instead.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
The “font” element is obsolete. Use CSS instead.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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