Amp.org W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “navTestDirectory” was here.
The first occurrence of ID “navValidationResources” was here.
The first occurrence of ID “navGiveToAmp” was here.
The first occurrence of ID “topnavlist” was here.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Attribute “expr:content” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Errors:
Duplicate ID “navTestDirectory”.
Duplicate ID “navValidationResources”.
Duplicate ID “navGiveToAmp”.
Duplicate ID “topnavlist”.
Attribute “name” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
Attribute “expr:content” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “content”, “itemprop”, “property”.
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