Spark-packages.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray doctype.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
The “align” attribute on the “h3” element is obsolete. Use CSS instead.
The “align” attribute on the “h4” element is obsolete. Use CSS instead.
Bad value “/?q=tags%3A%22Data Sources%22” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/?q=tags%3A%22Machine Learning%22” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
No “p” element in scope but a “p” end tag seen.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
End tag for “body” seen, but there were unclosed elements.
Unclosed element “div”.
Warnings:
The “navigation” role is unnecessary for element “nav”.
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