When one can call oneself expert

Hi, this is a conceptual question, if you can please

I want to expose a course about 10g new features, and I was thinking when I
could say
Juan Carlos Reyes  ORACLE EXPERT (I'm not going to say that still)

I only want to know 

What have to pass to use such credential.

how much books write?
How years of experience?
Which kind of recognition?
etc,

Could you giveme some clue?

Thanks

 
Juan Carlos Reyes Pacheco
 
 
Oracle Certified Professional 9i,10g
 
Developer Certified Professional 6i
--
http://www.freelists.org/webpage/oracle-l

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