Bkool.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
Bad value “related” for attribute “rel” on element “link”: The string “related” is not a registered keyword.
Bad value “handheld” for attribute “media” on element “link”: Deprecated media type “handheld”. For guidance, see the Media Types section in the current Media Queries specification.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
End tag “a” violates nesting rules.
Duplicate ID “second_nav”.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “second_nav” was here.
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