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

Hi,

the Eurex Spec. says (Page 19):
Please note, that EBS uses global dictionary scope far FAST operators. All the operator share the same dictionary regardless of the template and application type. ...

Bye
Zoltan

> 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