1917.com 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.)
Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
Element “head” is missing a required instance of child element “title”.
Attribute “xmlns:sign” not allowed here.
Attribute “xmlns:mml” not allowed here.
Element “index” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
End tag “illustrations” seen, but there were open elements.
Unclosed element “media”.
Warnings:
Attribute with the local name “xmlns:sign” is not serializable as XML 1.0.
Attribute with the local name “xmlns:mml” is not serializable as XML 1.0.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
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