Leanmanufacturingtools.org W3C HTML Markup Validation
HTML markup errors and warnings
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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”.
Bad value “http://fonts.googleapis.com/css?family=Euphoria+Script|Poly” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “name” not allowed on element “div” at this point.
Element “fb:like” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “http://leanmanufacturingtools.org/39/lean-thinking-lean-principles/ noopener” for attribute “rel” on element “a”: The string “http://leanmanufacturingtools.org/39/lean-thinking-lean-principles/” is not a registered keyword.
Bad value “attachment wp-att-917” for attribute “rel” on element “a”: The string “wp-att-917” is not a registered keyword.
Stray end tag “aside”.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Element name “fb:like” cannot be represented as XML 1.0.
Empty heading.
The “contentinfo” role is unnecessary for element “footer”.
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).
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