[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 
http://fixprotocol.org/discuss/read/1804ee83 - PLEASE DO NOT REPLY BY MAIL.]

Mike,

you don't process a mantissa field if the exponent value is NULL.

Section 10.6.2: "If a scaled number is nullable, the exponent is nullable and 
the mantissa is non-nullable. A NULL scaled number is represented as a NULL 
exponent. The mantissa is present in the stream iff the exponent is not NULL."

(This includes any pmap bit that would be present in the pmap as a result of an 
operator defined for the mantissa part. i.e., the pmap bit will be absent as 
well in the case of a null exponent. This is the only time you have a varying 
number of pmap bits for a field.)

/Rolf

> Rolf,
> 
> My question in example 2 is basically: Do you NOT continue processing
> the mantissa if after the result of processing the exponent, the
> exponent's current value in the dicationary is set to EMPTY. (either
> from previous value or NULL encoding)?
> 
> Thanks again, Mike


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