Historicphiladelphia.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Element “title” not allowed as child of element “head” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “_blank"” for attribute “target” on element “a”: Reserved keyword “blank"” used.
Element “span” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “h1” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “h2” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Bad element name “fb:like-box”: Code point “U+003A” is not allowed
No “p” element in scope but a “p” end tag seen.
The text content of element “script” was not in the required format: Content contains a line starting with the character sequence “//” but not ending with a newline.
Warnings:
Element name “fb:like-box” cannot be represented as XML 1.0.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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