Germanamerican.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
No space between attributes.
Duplicate attribute “name”.
End tag “article” seen, but there were open elements.
Unclosed element “div”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “main” role is unnecessary for element “main”.
The “region” role is unnecessary for element “section”.
The “contentinfo” role is unnecessary for element “footer”.
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