Patents.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Element “meta” is missing one or more of the following attributes: “http-equiv”, “itemprop”, “name”, “property”.
Element “meta” is missing one or more of the following attributes: “content”, “property”.
Stray end tag “meta”.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
A “charset” attribute on a “meta” element found after the first 1024 bytes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “name” on element “input”: Must not be empty.
The “center” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
Attribute “type” not allowed on element “textarea” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate attribute “value”.
Element “br” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Warnings:
Empty heading.
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