<meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE" />

  1. Actually what is the meaning of this statement ?

  2. Some of the examples use , to separate versions of IE, while some use ;; which is correct?

  3. The order IE=9; IE=8; IE=7; IE=EDGE has some importance, I wish to know that.

Edit: I am using <!DOCTYPE html>

html internet-explorer x-ua-compatible
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