Errors:
Attribute “xmlns:dc” not allowed here.
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:article” not allowed here.
Attribute “xmlns:book” not allowed here.
Attribute “xmlns:product” not allowed here.
Attribute “xmlns:profile” not allowed here.
Attribute “xmlns:video” not allowed here.
Bad value “” for attribute “id” on element “a”: An ID must not be the empty string.
Bad value “” for attribute “name” on element “a”: An ID must not be the empty string.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Duplicate ID “”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate attribute “id”.
Warnings:
Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:article” is not serializable as XML 1.0.
Attribute with the local name “xmlns:book” is not serializable as XML 1.0.
Attribute with the local name “xmlns:product” is not serializable as XML 1.0.
Attribute with the local name “xmlns:profile” is not serializable as XML 1.0.
Attribute with the local name “xmlns:video” is not serializable as XML 1.0.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The first occurrence of ID “” was here.
The “main” role is unnecessary for element “main”.
The “complementary” role is unnecessary for element “aside”.
Attribute “aria-required” is unnecessary for elements that have attribute “required”.
The “contentinfo” role is unnecessary for element “footer”.
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