Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “div” not allowed as child of element “hgroup” in this context. (Suppressing further errors from this subtree.)
Stray end tag “span”.
Element “hgroup” is missing a required instance of one or more of the following child elements: “h1”, “h2”, “h3”, “h4”, “h5”, “h6”.
Duplicate ID “not_single_page”.
No space between attributes.
Duplicate ID “pr_flg”.
Bad value “” for attribute “id” on element “form”: An ID must not be the empty string.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Duplicate ID “information”.
Duplicate ID “info_title”.
Duplicate ID “”.
Bad value “” for attribute “id” on element “nav”: An ID must not be the empty string.
No “li” element in scope but a “li” end tag seen.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
The “banner” role is unnecessary for element “header”.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The first occurrence of ID “not_single_page” was here.
The first occurrence of ID “pr_flg” was here.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The first occurrence of ID “information” was here.
The first occurrence of ID “info_title” was here.
The first occurrence of ID “” was here.
The “contentinfo” role is unnecessary for element “footer”.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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