[This message was posted by David Hait of  <[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/9d2f2c1b - PLEASE DO NOT 
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Rolf, this was a custom feed provided by one of our vendors.

> David, which feed are you referring to? /Rolf
> 
> > In Fast 1.0, it was possible to assign two different fields (say,
> > BID_PRICE and TRADE_PRICE) to the same PMAP slot, but different
> > templates, with the particular template chosen at encode/decode time.
> > So, a user could decode the first field (QUOTE_TRADE_INDICATOR, for
> > example), and use its value to determine how a later field in the same
> > message should be treated (continuing this example, as a BID_PRICE or
> > a TRADE_PRICE).
> >
> > How would you structure this in Fast 1.1 using the templates? It seems
> > that you would need a template to become active during encoding or
> > decoding, based on the VALUE of an already encoded/decoded field. This
> > is different from a dynamic template, where the identifier of the
> > template to be activated is explicitly coded in the stream.
> >
> > The motivation behind this, by the way, is to try to decode an
> > existing Fast 1.0 stream using a Fast 1.1 decoder. I believe that this
> > could be done relatively easily if the non-existent Template
> > Identifier field is skipped when encoding/decoding messages; but I
> > have run into the issue described above.


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