[This message was posted by Dale Wilson of Object Computing, Inc 
<[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/9ed28fc1 - PLEASE DO NOT REPLY BY MAIL.]

And of course when I said "segment" in my message below, I meant "Sequence".   

Dale

> Hi Naresh,
> 
> > > Is it possible to have a sequence as below where the pmap bit is set
> > > to false for the length of the sequence.
> > >
> > > [sequence name="MDEntries"] [typeRef name="MDIncGrp"/] [length
> > > name="NoMDEntries" id="268"] [copy/] [/length] [string
> > > name="MDUpdateAction" id="279"] [copy value="0"/] [/string] [!-- 0:
> > > New --] ....
> > >
> > > The field [length name="NoMDEntries" id="268"] [copy/] [/length]
> > >
> > > has a false in the pmap bit
> > >
> > > Therefore am not sure who many times to iterate through the sequence
> > >
> 
> The pmap bit associated with a segment applies to the length field of
> the segment. This pmap bit tells you whether the length appears on-the-
> wire. What it means when the length does not appear on-the-wire is
> determined by the operator associated with the length field.
> 
> In your case the length field of the sequence has a copy operator. The
> zero pmap bit is telling you that the sequence length does not appear
> on-the-wire. Instead you should re-use the previous length value from
> the appropriate dictionary.
> 
> Dale
> --
> Dale Wilson Principal Software Engineer Object Computing, Inc.
> (www.ociweb.com) Lead developer for QuickFAST (http:www.quickfast.org)


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