Question on I-140 about "the same or similar field"

Is there any official definition on the term "the same of similar filed" when someone changes job after 180 days of the I-140 approval? Thanks a lot for the answers in advance.

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• 給你個Link作參考。但是不是Similar很靈活。我一個朋友... -aegeanboat- ♂ (159 bytes) () 07/16/2008 postreply 10:39:21

• Link 在這裏... -aegeanboat- ♂ (37 bytes) () 07/16/2008 postreply 10:43:30

• Thanks -time2do_something- ♂ (14 bytes) () 07/16/2008 postreply 12:05:23

• 回複：Question on I-140 about "the same or similar field" -ninohu- ♀ (272 bytes) () 07/16/2008 postreply 10:43:45

• appreciated -time2do_something- ♂ (0 bytes) () 07/16/2008 postreply 12:06:52