Errors:
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
The text content of element “script” was not in the required format: Expected space, tab, newline, or slash but found “&” instead.
Attribute “metanavigation” not allowed on element “ul” at this point.
Attribute “search” not allowed on element “ul” at this point.
Attribute “search-input” not allowed on element “input” at this point.
Attribute “search-button” not allowed on element “a” at this point.
Attribute “submit-button” not allowed on element “button” at this point.
Attribute “main-navigation” not allowed on element “ul” at this point.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
A slash was not immediately followed by “>”.
Attribute “corporate” not allowed on element “img” at this point.
Attribute “responsibility"” not allowed on element “img” at this point.
Attribute “collage” not allowed on element “img” at this point.
Attribute “for:” not allowed on element “img” at this point.
Attribute “http:” not allowed on element “img” at this point.
Attribute “www.the-linde-group.com” not allowed on element “img” at this point.
Attribute “en” not allowed on element “img” at this point.
Attribute “news_and_media” not allowed on element “img” at this point.
Attribute “index.html"” not allowed on element “img” at this point.
Element “dl” is missing a required child element.
Attribute “newslist” not allowed on element “article” at this point.
Attribute “prev-news” not allowed on element “a” at this point.
Attribute “pause-news” not allowed on element “a” at this point.
Attribute “play-news” not allowed on element “a” at this point.
Attribute “next-news” not allowed on element “a” at this point.
Attribute “tracking” not allowed on element “div” at this point.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
Attribute “responsibility"” is not serializable as XML 1.0.
Attribute “for:” is not serializable as XML 1.0.
Attribute “http:” is not serializable as XML 1.0.
Attribute “index.html"” is not serializable as XML 1.0.
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).
The “contentinfo” role is unnecessary for element “footer”.
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