Pdfbooksworld.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Duplicate ID “logo”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad element name “class="img-responsive"”: Code point “U+003D” is not allowed
End tag “a” violates nesting rules.
End tag “header” seen, but there were open elements.
Unclosed element “div”.
Element “p” not allowed as child of element “h4” in this context. (Suppressing further errors from this subtree.)
The “center” element is obsolete. Use CSS instead.
Element “column” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Warnings:
The first occurrence of ID “logo” was here.
Element name “class="img-responsive"” cannot be represented as XML 1.0.
Empty heading.
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