Sib-science.info W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad start tag in “div” in “head”.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “_#= dataContainerId =#_” for attribute “id” on element “span”: An ID must not contain whitespace.
Duplicate ID “_#= dataContainerId =#_”.
End tag “footer” seen, but there were open elements.
Unclosed element “div”.
End tag for “body” seen, but there were unclosed elements.
Warnings:
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “_#= dataContainerId =#_” was here.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
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