Re: RSP next calls

Thanks to all,

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Topic: 4th Telco of RSP - Danh Le Phuoc
Date: Friday, 22 November 2013
Time: 14:00, GMT Time (London, GMT)


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2013/11/14 Emanuele Della Valle <emanuele.dellavalle@polimi.it>

>  Hello Jean-Paul, Eva, Avi and all,
>
>  what Eva says and Jean-Paul confirm is also what I think, sorry to
> create confusions.
>
>  My answer to Avi was putting emphasis on the fact that by "time-series"
> I do not mean a *sequence of numbers ordered by recency*, but a *sequence
> of RDF triples ordered by recency*.
>
>  Concerning how to describe time from the application perspective, my
> position is the following one:
> - 0 timestamps (i.e., relying on the temporal distance between the
> received triples ) makes compatibility with RDF straight forward, but it
> may hide problems (e.g., the temporal distance between two triples may be
> influenced by network delays)
> - 1 (point in time semantics for application time) allows for handling out
> of orders and for basic temporal operators (e.g., follows, precedes,
> contemporaryWith)
> - 2 (interval based semantics for events) allows for expressive temporal
> operators, but, at least in many scenarios I target, it is an overkill
>
>  Most of the commercial DSMS/CEP take either 0 or 1. The only commercial
> CEP that I know supporting 2 is Microsoft StreamInsight.
>
>  Time from the system perspective is a different issue. Whether system
> time should be externalised is something I still wonder.
>
>  Cheers,
>
>  Emanuele
>
>
>  On Nov 14, 2013, at 1:58 AM, Jean-Paul <jp.calbimonte@upm.es>
>  wrote:
>
>   Hello all,
>
>  Yes, I think Oscar's diagram (check it here:
> http://www.w3.org/community/rsp/wiki/Meeting_22.10.2013) more or less
> reflects part of the discussion we had about the scope.
>
>  We seem to agree that ordered streams of elements (infinite or
> 'recorded' streams as well) are in scope (green ticks in the diagram). In
> these cases the order might be of different natures but we agreed to focus
> on time-based order. I don't think we agreed yet on focusing only in point
> in time timestamps or intervals. For the moment it is just time-based
> order, I believe.
>
> Then there are datasets which may not be streaming in nature but might be
> needed to processed in a streaming fashion (e.g. a very large dataset). I
> understood we are not ruling this case out, but might not focus on it in a
> first stage.
>
>  Thanks to Emanuele for the input about the scope. As Eva pointed out,
> there are some discrepancies that we can fix in the wiki. I am also a bit
> unconfortable with calling the streams in our scope as 'time-series', I
> think this term has other connotations in related areas.
>
>  well, this is just a personal comment as well, but I'm happy to continue
> this discussion. We can also continue modifying the wiki until we have the
> Telco, and afterwards.
>
>  best
> jp
>
>
>
>
>
>
>
>
> 2013/11/13 Eva Blomqvist <evabl444@gmail.com>
>
>> Hi!
>> I think that some of those who were in the meeting also might have
>> slightly differing interpretations of what was said... I agree to that
>> there were two alternative interpretations of "data stream" discussed, but
>> as far as I understood those differed in the sense that 1) was an
>> *infinite* stream, where the elements of the stream could somehow be
>> *associated with time* (whether a timestamped triple, a timestamped graph,
>> or just a stream where time is implicit from the arrival times of elements
>> etc), and 2) was a *finite* stream of elements where *time is not
>> necessarily an aspect*, e.g. triples from a data store being processed in a
>> streaming fashion.
>>
>> I would be reluctant to at this stage limit ourselves to a specific
>> model, e.g. RDF statements with a single timestamp each.
>> Just my 2c..
>> /Eva
>>
>>
>> On 12/11/2013 17:33 , Emanuele Della Valle wrote:
>>
>> Hi Abram,
>>
>>  I mean a list of tuples <s,t> where s is an RDF statement and t is a
>> non decreasing timestamp.
>>
>>  Cheers,
>>
>>  Emanuele
>>
>> --
>> prof. Emanuele Della Valle
>> DEIB - Politecnico di Milano
>> m. +393389375810
>> w. http://emanueledellavalle.org
>>
>>  On Nov 12, 2013, at 12:27 PM, Abraham Bernstein <bernstein@ifi.uzh.ch>
>>  wrote:
>>
>>  Emanuele, all
>>
>>  I am slightly confused.... so just to clarify When you talk about
>> time-series: do you mean a series of numbers (expressed in triples) or a
>> time-ordered series of triples?
>>
>>  Cheers
>>
>>  Avi
>>
>>
>>  On 12.11.2013, at 03:05, Jean-Paul <jp.calbimonte@upm.es> wrote:
>>
>>    Hello,
>>
>>  Thanks for your input. 4th Telco will be on nov 22 15:00 CET.
>>  We will be discussing about the Streams concepts and definitions that we
>> have started drafting in the wiki.
>>  Please feel free to provide your input there already:
>>
>> http://www.w3.org/community/rsp/wiki/Concepts_and_Definitions
>>
>>  ...specialy if there is a key concept missing that you consider we
>> should include.
>>
>>  Cheers,
>>  jp
>>
>>
>>  PS
>> Please, if Danh or Manfred can help us again with Webex, we will be very
>> thankful.
>>
>>
>>
>>
>>
>>
>> 2013/11/6 Jean-Paul <jp.calbimonte@upm.es>
>>
>>>   Yes, I see. That will make everyone's life easier.
>>>  We'll dicuss it.
>>>
>>>  thanks
>>>
>>>  jp
>>>
>>>
>>> 2013/11/6 Axel Polleres <axel@polleres.net>
>>>
>>>> Thanks, BTW, may I suggest that instead of a single doodle per Telco,
>>>> to doodle for one fixed timeslot per week, e.g. "Tue 15:00" or alike, as
>>>> usual in other WGs? I think this should make planning easier. Maybe we can
>>>> discuss this in the Telco.
>>>>
>>>> thanks & best regards,
>>>> Axel
>>>>
>>>> --
>>>> Prof. Dr. Axel Polleres
>>>> Institute for Information Business, WU Vienna
>>>> url: http://www.polleres.net/  twitter: @AxelPolleres
>>>>
>>>> On Nov 2, 2013, at 11:40 PM, Jean-Paul <jp.calbimonte@upm.es> wrote:
>>>>
>>>> > Hello All,
>>>> >
>>>> > Thanks to all who could attend the meeting at ISWC, and specially to
>>>> those who made it through WebEx (although couldn't interact too much,
>>>> unfortunately)
>>>> >
>>>> > The meeting went quite well, and we received input from people of
>>>> other sub-communities and with different background. Others showed
>>>> interest, at least as 'observers' of what we are trying to do.
>>>> >
>>>> > One result of the meting is the intention of clarifying the scope of
>>>> our work. A first step to do this is to have written some of the key
>>>> concepts and definitions that we should agree on. Mikko has already
>>>> provided a first version as he already commented, and the purpose of the
>>>> next telecon will be to discuss them:
>>>> >
>>>> > http://www.w3.org/community/rsp/wiki/Concepts_and_Definitions
>>>> >
>>>> > Until then, I invite you all to contribute to that ( I see some have
>>>> already started, great!) so that we can have material for discussion.
>>>> >
>>>> > Please, also indicate your preferences for the next calls:
>>>> >
>>>> > http://doodle.com/a8ggni2v4su7c88b
>>>> >
>>>> > http://doodle.com/6i97qvmaqiwnwvsa
>>>> >
>>>> > http://doodle.com/hixgfbv9drxbu4in
>>>> >
>>>> >
>>>> > Thanks to all,
>>>> >
>>>> > jp
>>>> >
>>>> > --
>>>> > Jean-Paul Calbimonte
>>>> > Ontology Engineering Group
>>>> > Universidad Politécnica de Madrid
>>>>
>>>>
>>>
>>>
>>> --
>>> Jean-Paul Calbimonte
>>> Ontology Engineering Group
>>> Universidad Politécnica de Madrid
>>>
>>
>>
>>
>> --
>> Jean-Paul Calbimonte
>> Ontology Engineering Group
>> Universidad Politécnica de Madrid
>>
>>
>> -----------------------------------------------------------------
>> |  Professor Abraham Bernstein, PhD
>> |  University of Zürich, Department of Informatics
>> |  web: http://www.ifi.uzh.ch/ddis/bernstein.html
>>
>>
>>
>>
>
>
> --
> Jean-Paul Calbimonte
> Ontology Engineering Group
> Universidad Politécnica de Madrid
>
>
>


-- 
Jean-Paul Calbimonte
Ontology Engineering Group
Universidad Politécnica de Madrid