Errors:
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “content-style-type” for attribute “http-equiv” on element “meta”.
Bad value “content-script-type” for attribute “http-equiv” on element “meta”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “div” seen, but there were open elements.
Unclosed element “nav”.
Duplicate ID “img”.
Bad value “150px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
Bad value “mailto:info@proantic.com?subject=Questions au webmestre Proantic.com” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The “navigation” role is unnecessary for element “nav”.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The first occurrence of ID “img” was here.
Text run is not in Unicode Normalization Form C.
This document appears to be written in French. Consider adding “lang="fr"” (or variant) to the “html” start tag.
France FR