Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “name” on element “button”: Must not be empty.
Bad value “menu” for attribute “role” on element “a”.
Bad value “” for attribute “id” on element “a”: An ID must not be the empty string.
Bad value “” for attribute “name” on element “a”: An ID must not be the empty string.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Duplicate ID “”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “h4” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Duplicate attribute “id”.
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “about” not allowed on element “article” at this point.
Warnings:
The “link” role is unnecessary for element “a”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The first occurrence of ID “” was here.
The “article” role is unnecessary for element “article”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “contentinfo” role is unnecessary for element “footer”.
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