Errors:
The “profile” attribute on the “head” element is obsolete.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 “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “cleartype” for attribute “http-equiv” on element “meta”.
A “charset” attribute on a “meta” element found after the first 1024 bytes.
A document must not include more than one “meta” element with a “charset” attribute.
Attribute “about” not allowed on element “meta” at this point.
Attribute “rel” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “content”, “name”, “property”.
Attribute “pubdate” not allowed on element “time” at this point.
Bad value “” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “/all-news?solrsort=ds_search_date desc” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Attribute “about” not allowed on element “article” at this point.
Attribute “content” not allowed on element “span” at this point.
Attribute “datatype” not allowed on element “span” at this point.
Bad value “/search?fq[]=entity_type:comment” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Bad value “/conference-calendar?fq[]=ds_search_date:[2018-07-14T01:03:02Z TO 2018-07-21T01:03:02Z]” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Warnings:
The “banner” role is unnecessary for element “header”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The “navigation” role is unnecessary for element “nav”.
The “contentinfo” role is unnecessary for element “footer”.
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