Cmseducation.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “http_equip” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “http-equiv”, “itemprop”, “name”, “property”.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “banner” for attribute “role” on element “nav”.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Element “marquee” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “width” attribute on the “th” element is obsolete. Use CSS instead.
The “aria-controls” attribute must point to an element in the same document.
Warnings:
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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