Ubuntuguide.net W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
The “profile” attribute on the “head” element is obsolete.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.
Bad value “archives” for attribute “rel” on element “link”: The string “archives” is not a registered keyword.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
Element “input” is missing required attribute “alt”.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “widgetwidget_text”.
No “li” element in scope but a “li” end tag seen.
Stray end tag “ul”.
Warnings:
The first occurrence of ID “widgetwidget_text” 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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