Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Attribute “src” without an explicit value seen. The attribute may be dropped by IE7.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Empty heading.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
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.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Attribute “property” not allowed on element “meta” at this point.
Attribute “itemprop” not allowed on element “meta” at this point.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Element “img” is missing required attribute “src”.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Element “div” not allowed as child of element “figure” in this context. (Suppressing further errors from this subtree.)
End tag “br”.
No “p” element in scope but a “p” end tag seen.
Element “header” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
The element “header” must not appear as a descendant of the “header” element.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “itemprop” attribute was specified, but the element is not a property of any item.
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