Mtmary.edu W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
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.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Attribute “xmlns:ouc” not allowed here.
The “language” attribute on the “script” element is obsolete. Use the “type” attribute instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
Attribute with the local name “xmlns:ouc” is not serializable as XML 1.0.
The “navigation” role is unnecessary for element “nav”.
The “button” role is unnecessary for element “input” whose type is “submit”.
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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