[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 
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Hi gu gang,

When you're learning how FAST encoding works, there is no substitute for 
reading and understanding the standard; however, once you understand it, this 
cheat-sheet may come in handy as a reference:

   http://code.google.com/p/quickfast/wiki/FastFieldRules

To take one of your examples:

   <uInt32 name="RptSeq" id="83"><increment /></uInt32>

Find the row that starts Increment Mandatory 
Reading across that row you can see that it uses a pmap bit.  If the bit is 
zero then there is no value in the stream and the result is the dictionary + 1; 
if the pmap bit is one then the value comes from the stream.

Hope this helps,

Dale Wilson
Principal Software Engineer
Object Computing, Inc.


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