Net4u.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
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The “profile” attribute on the “head” element is obsolete.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 “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “lyteframe” for attribute “rel” on element “a”: The string “lyteframe” is not a registered keyword.
The “rev” attribute on the “a” element is obsolete. Use the “rel” attribute instead, with a term having the opposite meaning.
Bad value “lytebox[about-2]” for attribute “rel” on element “a”: The string “lytebox[about-2]” is not a registered keyword.
Warnings:
This document appears to be written in Japanese. Consider adding “lang="ja"” (or variant) to the “html” start tag.
Japan JP