Errors:
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 “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Attribute “width” not allowed on element “div” at this point.
Attribute “height” not allowed on element “div” at this point.
Attribute “frameborder” not allowed on element “div” at this point.
Attribute “allowfullscreen” not allowed on element “div” at this point.
Bad value “” for attribute “name” on element “select”: Must not be empty.
Element “img” is missing required attribute “src”.
Duplicate attribute “id”.
Attribute “href” not allowed on element “button” at this point.
Attribute “about” not allowed on element “article” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
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 “navigation” role is unnecessary for element “nav”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “article” role is unnecessary for element “article”.
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