On Thursday 29 May 2003 00:36, Yen-Ming Mark Lai wrote:
> in this case, what is smts? just some arbitrary variable?

yes, this is an arbitrary variable or expression.

>
> also,  how do we know the name of the SFR or do we define the name of the
> SFR ourselves?

all SFRs are defined in appropriate headers. They have names as mentioned in 
'slau049'.

~d

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