Mozillazine.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
The “profile” attribute on the “head” element is obsolete.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.
Bad value “archives” for attribute “rel” on element “link”: The string “archives” is not a registered keyword.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “g:plusone” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “fb-root”.
No “p” element in scope but a “p” end tag seen.
Element “strong” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
The text content of element “script” was not in the required format: Expected space, tab, newline, or slash but found “{” instead.
Warnings:
Element name “g:plusone” cannot be represented as XML 1.0.
The first occurrence of ID “fb-root” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in Japanese. Consider adding “lang="ja"” (or variant) to the “html” start tag.
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