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FAST Protocol
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Proposal For New FAST Operator Default-Delta
Clive Browning / Rapid Addition Ltd
29 Apr 2006 5:50PM ETWe are seeing the following "general" conclusions for FAST field operators:
Defaults, Increments, Copys and Deltas (when sequence is always increasing) all work well for numerics.
Defaults and Copys are also good for strings, but Deltas do not work so well in practice…
e.g.
AAAA (transmit AAAA)
AAAAB (transmit B)
AAAABC (transmit C)
AAAABC (transmit nothing)
AAAABCD (transmit D)
Above does work fine for string delta operator
But…
AAAA
AAAAB
AAAABC
AA
Does not work as there is currently no way to “reset” to a new starting delta value.
What might be useful is a Default-Delta operator – e.g. just pass the difference from a default value …
Default = AAAA
AAAA (transmit nothing)
AAAAB (transmit B)
AAAABB (transmit BB)
AAAAC (transmit C)
This might also be useful for numerics, e.g. default = 225
227 (transmit 2)
229 (transmit 4)
226 (transmit 1)
230 (transmit 5)
Is it worth investigating this for the next FAST release?
Clive Browning
Rapid Addition Ltd
Proposal For New FAST Operator Default-Delta
Clive Browning / Rapid Addition Ltd 29 Apr 2006 5:50PM ET
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