Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
Bad value “Expires” for attribute “http-equiv” on element “meta”.
Element “container” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
The “center” element is obsolete. Use CSS instead.
End tag “div” seen, but there were open elements.
Unclosed element “span”.
Duplicate ID “table_paging”.
No space between attributes.
Bad value “off-canvas” for attribute “role” on element “section”.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The “textbox” role is unnecessary for an “input” element that has no “list” attribute and whose type is “text”.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “complementary” role is unnecessary for element “aside”.
Empty heading.
The first occurrence of ID “table_paging” was here.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
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