exp direct parameter can have more than 1 character?

From: "Guang Mei" <gmei@xxxxxxxxxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
Date: Thu, 12 Mar 2009 15:56:38 -0400

It seems when doing exp, oracle (at least 10gR2) only looks for the first 
character of DIRECT parameter. For example,

exp user/passwd direct=YN
exp user/passwd direct=NY
exp user/passwd direct=Y111
exp user/passwd direct=N111

all are working. I would not expect that based on what I get from 

exp help=y

Any comments?

Guang Mei
www.eversave.com

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