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@NUMERIC


@NUMERIC[string]:  Returns "1" if the argument is composed entirely of 
digits (0 to 9), signs (+ or -), and the thousands and decimal separators. 
 Otherwise, returns "0".  If the string begins with a decimal separator it 
is not considered numeric unless the next character is a digit, and there 
are no more decimal separators within the string.  For example, ".07" is 
numeric, but ".a" and ".07.01" are not. 

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