Toyokeizai.net 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>”.
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:fb” not allowed here.
Attribute “xmlns:website” not allowed here.
Attribute “xmlns:article” not allowed here.
Attribute “xmlns:twitter” not allowed here.
Bad value “content-script-type” for attribute “http-equiv” on element “meta”.
Bad value “content-style-type” for attribute “http-equiv” on element “meta”.
Bad value “mixi-check-image” for attribute “rel” on element “link”: The string “mixi-check-image” is not a registered keyword.
Attribute “height” not allowed on element “a” at this point.
Warnings:
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Attribute with the local name “xmlns:website” is not serializable as XML 1.0.
Attribute with the local name “xmlns:article” is not serializable as XML 1.0.
Attribute with the local name “xmlns:twitter” is not serializable as XML 1.0.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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