Skimap.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Obsolete doctype. Expected “<!DOCTYPE html>”.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
Attribute “xmlns:dc” not allowed here.
Attribute “xmlns:cc” not allowed here.
Bad value “cc:attributionURL” for attribute “rel” on element “a”: The string “cc:attributionURL” is not a registered keyword.
Bad value “dc:source” for attribute “rel” on element “a”: The string “dc:source” is not a registered keyword.
Bad value “cc:morePermissions” for attribute “rel” on element “a”: The string “cc:morePermissions” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.
Attribute with the local name “xmlns:cc” is not serializable as XML 1.0.
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