Re: RSP Query Semantics - RDF Stream Processing Community Group

Hi all,
I also like the proposal, it is a solution that allow to have both 
interval-based and point-based cases (the second as special case of the 
first).

I have a question: are in scope of this group discussions about 1) how 
to serialise  this data model (e.g. Trig) and 2) how to transmit it 
(e.g. WebSocket and HTTP Chunked encoding)?
In the case, I think we should put these items in our agenda.

Daniele

On 04/04/2014 01:36 PM, Manfred Hauswirth wrote:
> Dear all,
>
> Avi is right IMHO! We discussed this a number of times and I thought 
> we had agreed that intervals are essential (also from our practical 
> experience in a lot of projects).
>
> So, I fully support Avi's proposal.
>
> Cheers,
>
> Manfred
>
> On 04/04/14 09:30, Abraham Bernstein wrote:
>> Dear all
>>
>> I just to the Query semantics page
>> (http://www.w3.org/community/rsp/wiki/RSP_Query_Semantics ). Reading the
>> text I saw that the page says:
>>
>> G = {( subj, pred, obj)}
>>
>> and
>>
>> A stream is a sequence (G, τ ) where τ ∈ T the set of all timestamps.
>>
>> This worries me!
>>
>> As we discussed a number of time (I believe I raised the issue back last
>> September
>> http://lists.w3.org/Archives/Public/public-rsp/2013Sep/0027.html and it
>> seemed to me that we got agreement on the issue
>> http://lists.w3.org/Archives/Public/public-rsp/2013Dec/0010.html)
>> */intervals are elemental/*. Many things do not happen in one moment of
>> time but are really things that are happening over time. Hence, I would
>> prefer a formulation like the following:
>>
>> A stream is a sequence (G, τ ) where τ ∈ T the set of all *intervals*.
>>
>> τ = [t_s, t_e], where t_s denotes the start time and t_e denotes the end
>> time.
>>
>> As a short hand notation we could say that when t_s = t_e then one can
>> only write one of them.
>>
>> What do you guys think?
>>
>> Avi
>>
>>
>> -----------------------------------------------------------------
>> |  Professor Abraham Bernstein, PhD
>> |  University of Zürich, Department of Informatics
>> |  web: http://www.ifi.uzh.ch/ddis/bernstein.html
>>
>

Received on Friday, 4 April 2014 11:53:29 UTC