Tabulex.dk W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
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.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Attribute “about” not allowed on element “article” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “\” not allowed on element “img” at this point.
Attribute “datatype” not allowed on element “span” at this point.
Attribute “content” not allowed on element “span” at this point.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
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).
Attribute “\” is not serializable as XML 1.0.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Denmark DK