Errors:
Attribute “rel” not allowed on element “meta” at this point.
Attribute “href” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Attribute “datatype” not allowed on element “span” at this point.
Attribute “content” not allowed on element “span” at this point.
Bad value “https://cnes.fr/fr/page-intermediaire/Dossiers d'actualite” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “https://cnes.fr/fr/page-intermediaire/Les Mardis de l'espace” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “https://cnes.fr/fr/page-intermediaire/Dossiers de vulgarisation” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
Bad value “https://cnes.fr/fr/page-intermediaire/Nos autres sites” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “gallery-fil_media” for attribute “rel” on element “a”: The string “gallery-fil_media” is not a registered keyword.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Text not allowed in element “iframe” in this context.
Duplicate attribute “class”.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “actinspace""” not allowed on element “a” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Attribute “actinspace""” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
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