[This message was posted by Rolf Andersson of Pantor Engineering 
<[email protected]> to the "FAST Protocol" discussion forum at 
http://fixprotocol.org/discuss/46. You can reply to it on-line at 
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Douglas,

alternative 2 is correct.

exponent=0 represents a NULL value (in which case no mantissa follows)
exponent=1 represents a zero value

(with delta coding, mantissa=35 is correct given that it is the first 
occurrence or the previous mantissa value is 0 (zero))

/Rolf

> I have following decimal in a template:
> 
>   (decimal name="MDEntryPx" id="270" presence="optional") (exponent)
>   (/exponent) (mantissa) (delta /) (/mantissa) (/decimal)
> 
> if MDEntryPx= 35 which of following encode is correct?
> 1) exponent = 0 mantissa = 35
> 2) exponent = 1 mantissa = 35 (because MDEntryPx optional)


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