I received SAS code that contains a regular expression and I'm having a hard time understanding it. I need to make some edits to it (output isn't correct), but first I need to know what exactly what it is saying. I've used cheat sheets but it's hard for me to put the whole expression together. Any help would be appreciated! PRXPARSE("/((\D{1,2}.?\D{0,2}\S?) (X) ?\S?) {1,3} (MM|CM)/I")
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