Re: RSP Data Model

Dear all

One additional comment. I have said previously that defining things in relation to a single timestamp has the huge disadvantage over using intervals. I have encountered the need to trat intervals in almost all real-world scenarios that I have worked with. I know that time stamps are easier, but often neither accurate nor practical.

I hope this helps

Cheers

Avi

ps. One outline of a language that uses intervals rather than timestamps is TEF SPARQL (http://www.merlin.uzh.ch/publication/show/8467 <http://www.merlin.uzh.ch/publication/show/8467>)



> On 12 Jun 2015, at 09:49, Emanuele Della Valle <emanuele.dellavalle@polimi.it> wrote:
> 
> Dear Alasdair, and all
> 
> thanks for the report. I would like to point out that the sentence “There can be multiple graphs with the same timestamp” is, in my opinion, a bad choice. It will prevent graphs to be interpreted as a form of punctuation [1] and this was one of the most important gain of the version of RSP Data Model discussed in Berlin (i.e., graphs with strictly increasing timestamps). The lack of punctuation is a problem of the “traditional" timestamped triples data model where contemporary triples must be admitted.
> 
> Best regards,
> 
> Emanuele
> 
> [1] http://link.springer.com/referenceworkentry/10.1007%2F978-0-387-39940-9_285 <http://link.springer.com/referenceworkentry/10.1007%2F978-0-387-39940-9_285>
> 
> 
>> On 11 Jun 2015, at 18:37, Gray, Alasdair J G <A.J.G.Gray@hw.ac.uk <mailto:A.J.G.Gray@hw.ac.uk>> wrote:
>> 
>> Hi All,
>> 
>> During the ESWC RSP Workshop we had a breakout group focus on defining the RSP data model. I was charged with the action of updating the semantics document with the agreed model.
>> 
>> You can find the updated data model at
>> https://github.com/streamreasoning/RSP-QL/blob/master/Semantics.md <https://github.com/streamreasoning/RSP-QL/blob/master/Semantics.md>
>> 
>> Best regards,
>> 
>> Alasdair
>> 
>> -- 
>> Alasdair J G Gray
>> Lecturer, Heriot-Watt University
>> Web: http://www.alasdairjggray.co.uk <http://www.alasdairjggray.co.uk/>
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>> 
>> 
>> 
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> 

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|  University of Zürich, Department of Informatics
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