AddThis xmlns
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This plugin adds the xmlns:addthis="http://www.addthis.com/help/api-spec" entry to the HTML tag. This head entry is required to make it Val …
This plugin adds the xmlns:addthis=”http://www.addthis.com/help/api-spec” entry to the HTML tag. This head entry is required to make it Valid XHTML. More info at http://www.addthis.com/help/client-api#valid-xhtml
Esse plugin está disponível para download para o seu .