Errors:
Legacy doctype. Expected “<!DOCTYPE html>”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “version” attribute on the “html” element is obsolete. You can safely omit it.
The “profile” attribute on the “head” element is obsolete.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 “_tab” for attribute “target” on element “a”: Reserved keyword “tab” used.
Duplicate ID “newsfeed”.
Duplicate ID “user-block”.
Duplicate ID “profile-name”.
Duplicate ID “timestamp”.
Duplicate ID “contentblock”.
Duplicate ID “picture”.
Duplicate ID “article-headline”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “align” attribute on the “img” element is obsolete. Use CSS instead.
Stray end tag “a”.
End tag for “body” seen, but there were unclosed elements.
Unclosed element “div”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “article” role is unnecessary for element “article”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The first occurrence of ID “newsfeed” was here.
The first occurrence of ID “user-block” was here.
The first occurrence of ID “profile-name” was here.
The first occurrence of ID “timestamp” was here.
The first occurrence of ID “contentblock” was here.
The first occurrence of ID “picture” was here.
The first occurrence of ID “article-headline” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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