Minedu.fi W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “yja-child-class” not allowed on element “div” at this point.
Attribute “yja-child-element” not allowed on element “div” at this point.
Attribute “yja-include-vocabularies” not allowed on element “div” at this point.
Attribute “yja-show-description” not allowed on element “div” at this point.
Attribute “yja-classname” not allowed on element “div” at this point.
Attribute “yja-userealsite” not allowed on element “div” at this point.
Attribute “yja-classpk” not allowed on element “div” at this point.
Element “img” is missing required attribute “src”.
Attribute “type” not allowed on element “menu” at this point.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The “contentinfo” role is unnecessary for element “footer”.
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