[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/af6a87aa - PLEASE DO NOT REPLY BY MAIL.]

> That's why I was suggesting that if
> there is to be another FAST version, it might be a good update to move
> the template id to the beginning of the message and you can even set it
> to NULL if it is to be copied from a previous message.

That doesn't make sense.   A NULL value means the field is not present in this 
record.  The TID must be present.

A zero PMAP bit for a field means the field is not present _on the wire_.  To 
answer your earlier question, "Yes there are FAST data sources that omit the 
TID on the wire, relying on the implicit copy operator for the template ID.  
For this to work, the PMAP must come first.

If this is a problem for your implementation, I might respectfully suggest you 
change your implementation rather than trying to change the protocol.

Dale


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