Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Text not allowed in element “iframe” in this context.
Bad value “https://www.w3.org/2000/svg” for the attribute “xmlns” (only “http://www.w3.org/2000/svg” permitted here).
Bad value “https://www.w3.org/1999/xlink” for the attribute “xmlns:link” (only “http://www.w3.org/1999/xlink” permitted here).
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Attribute “about” not allowed on element “article” at this point.
Duplicate ID “edit-secondary”.
Duplicate ID “edit-actions”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “h4” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “banner” role is unnecessary for element “header”.
Attribute “xmlns” is not serializable as XML 1.0.
Attribute “xmlns:xlink” with a value other than “http://www.w3.org/1999/xlink” is not serializable as XML 1.0 without changing document semantics.
The “navigation” role is unnecessary for element “nav”.
The “button” role is unnecessary for element “summary”.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
The first occurrence of ID “edit-secondary” was here.
The first occurrence of ID “edit-actions” was here.
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