Persee.fr W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “value” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “content”, “property”.
CSS: “border-width”: Parse Error.
CSS: “border-style”: Parse Error.
Bad value “sidebar” for attribute “role” on element “header”.
Bad value “https://twitter.com/intent/tweet?text=Persée : Accéder à des milliers de publications scientifiques&via=perseefr&url=http://www.persee.fr/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “navigation” for attribute “role” on element “header”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “http://” for attribute “href” on element “a”: Invalid host: empty host.
Start tag “a” seen but an element of the same type was already open.
Stray end tag “a”.
Bad value “footer” for attribute “role” on element “footer”.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “banner” role is unnecessary for element “header”.
Empty heading.
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