Fder.edu.uy W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “banner” role is unnecessary for element “header”.
The “complementary” role is unnecessary for element “aside”.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “navigation” role is unnecessary for element “nav”.
Errors:
Attribute “about” not allowed on element “article” at this point.
Attribute “content” not allowed on element “span” at this point.
Attribute “rel” not allowed on element “span” at this point.
Attribute “about” not allowed on element “span” at this point.
Attribute “datatype” not allowed on element “span” at this point.
Duplicate attribute “lang”.
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