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Re: dictionaries in EUREX-FAST
Alessio Mazzanti / List
4 Aug 2008 6:29AM ET

Hi,
I'm a little bit confused about this issue...
Taking into account both the FAST documentation, and the FAST Message Templates provided as Appendix of the Eurex - Enhanced Broadcast Solution handbook, I would say there is no a global dictionary, but one dictionary per Application Type (that in the case of EBS it should correspond to one dictionary per Template).
In fact w.r.t. the FAST handbook sections [5 Application Types], [6.1 Instruction Context] and [6.3.1 Dictionaries and Previous Values], each time the FAST engine encounters an element containing a element it should change dictionary...

Please let me know if I'm making a mistake.
Thanks in advance,
-- Ale

> Hi Martin,
>
> yes, there is only one global dictionary in Eurex EBS. Because Eurex EBS
> distributes the information in form of multicast datagrams, the
> dictionary is valid only for one datagram. Inside one datagram there can
> be more FAST reset message, which resets the dictionary. There is no
> template specific dictionary.
>
> Bye Zoltan
>
> > Hey everybody.
> >
> > Just got confused about dictionaries. Do I have to maintain one (and
> > just one) global dictionary for decoding EUREX EBS-FAST-message
> > streams? In the EBS-Specification is a sentence that says: All the
> > operators share the same dictionary regardless of the template and
> > application type. and there is another: For the same message type,
> > FAST compression will be applied to the fields from the second
> > message.
> >
> > What I did not get is: is there one dictionary for each message type
> > or not? Is message type matching to templates in this case? But then
> > there would be a hint to different ditionaries for each template in
> > the template, well there is no one... *confused*
> >
> > Bye Martin

dictionaries in EUREX-FAST
Martin Gag / nobody   1 Aug 2008 3:41AM ET

Re: dictionaries in EUREX-FAST
Zoltan Vekony   1 Aug 2008 4:18AM ET

Re: dictionaries in EUREX-FAST
Alessio Mazzanti / List   4 Aug 2008 6:29AM ET

Re: dictionaries in EUREX-FAST
Zoltan Vekony   4 Aug 2008 6:48AM ET