| http://www.w3.org/ns/prov#value | - degrade gracefully when scripts are disabled).For a simple example of progressive enrichment, look at the Twitter home page in a modern browser such as Chrome or Firefox, compared to Internet Explorer 8 or below.Rounded corners in Firefox (left) and square corners in IE8 (right)As you can see,the white box and the ???sign in??? button have nice rounded corners in Firefox, and slightly pointier squ
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