Grafomap.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “Page-1” was here.
The first occurrence of ID “01-grafo-index” was here.
The first occurrence of ID “references” was here.
The first occurrence of ID “Group-11” was here.
The first occurrence of ID “Shape” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “true” for attribute “autoplay” on element “video”.
Bad value “true” for attribute “loop” on element “video”.
Attribute “href” not allowed on element “button” at this point.
Bad value “01-grafo-index” for attribute “id” on element “g”: Not a valid XML 1.0 name.
Duplicate ID “Page-1”.
Duplicate ID “01-grafo-index”.
Duplicate ID “references”.
Duplicate ID “Group-11”.
Duplicate ID “Shape”.
United States US