Sapphireventures.com 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”.
Stray end tag “link”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “1” for attribute “version” on element “svg”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “Capa_1”.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “Capa_1” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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