Sigmacare.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Legacy doctype. Expected “<!DOCTYPE html>”.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
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.
Bad value “navigation” for attribute “role” on element “ul”.
Attribute “about” not allowed on element “article” at this point.
End tag “section” seen, but there were open elements.
Unclosed element “article”.
Duplicate ID “block-menu-menu-nav-main-menu”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “navigation” role is unnecessary for element “nav”.
The “button” role is unnecessary for element “button”.
The first occurrence of ID “block-menu-menu-nav-main-menu” was here.
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