GET variable for css files?

bobbylime

New Member
I've noticed some sites when they link to their css they pass what appears to be a GET variable in addition to the link, for example the http://html5boilerplate.com html template, \[code\]?v=2\[/code\]\[code\]<link rel="stylesheet" href="http://stackoverflow.com/questions/4905853/css/style.css?v=2">\[/code\]Is this a flag for some server rewrite or something more?
 
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