Mashery.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “ImageToolbar” for attribute “http-equiv” on element “meta”.
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Text not allowed in element “iframe” in this context.
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 “”.
Start tag “a” seen but an element of the same type was already open.
End tag “a” violates nesting rules.
Cannot recover after last error. Any further errors will be ignored.
Warnings:
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The “name” attribute is obsolete.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.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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