Razm.info W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “hy-HY” for attribute “lang” on element “html”: Bad region subtag.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
Element “tbody” not allowed as child of element “table” in this context. (Suppressing further errors from this subtree.)
Bad value “designer” for attribute “rel” on element “a”: The string “designer” is not a registered keyword.
Bad value “generator” for attribute “rel” on element “a”: The string “generator” is not a registered keyword.
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