Teorema.com.mx W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “http://ogp.me/ns/fb#” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Bad element name “fb:comments-count”: Code point “U+003A” is not allowed
Duplicate ID “fb-root”.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “center” element is obsolete. Use CSS instead.
Bad value “60%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
Element name “fb:comments-count” cannot be represented as XML 1.0.
The first occurrence of ID “fb-root” was here.
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