Re: RSP Telco 06.11.2015

Hi guys,

I have a meeting at 2pm and will most likely not be able to join. In case I won’t, here is my concern for the next step:

I talked to Daniele and Jean-Paul, the next issue to consider is: after applying the window operators on the streams, we get a set of graphs, do we want to join these graphs using the patterns specified in the window ops?

I go for not joining. Things to consider are:

(a) treatment at graph level must generalize treatment at triple level 
(b) you can always take the same window of the same stream with 2 different patterns and then join them later. If you want to have the in-stream join effect, can you exclude it when you don't want to?
(c) towards having CEP operators inside a window operator like SEQ,…, it looks odd for me to join the graph. Have a look at [1] where Danh and I started with SEQ for CQELS.

[1] Minh Dao-Tran and Danh Le-Phuoc.
Towards Enriching CQELS with Complex Event Processing and Path Navigation.
http://www.kr.tuwien.ac.at/staff/dao/pub/2015/TowardsEnrichingCQELSWithComplexEventProcessingAndPathNavigation2015-hidest.pdf

Best,
Minh.

On 06 Nov 2015, at 00:27, Jean Paul Calbimonte <jpcalbimonte@delicias.dia.fi.upm.es> wrote:

> Dear all,
> 
> The bi-weekly call will take place on Friday 06.11 at 15:00 CET.
> https://collab.switch.ch/rsp/
> 
> - The main proposed topic is the drafting of the
> query semantics definition. Drafting already started, based on this formalization: 
> 
> RSP-QL Semantics: a Unifying Query Model to Explain Heterogeneity of RDF Stream Processing Systems. D. Dell’Aglio, E. Della Valle, J.-P. Calbimonte, O. Corcho. Int. J. Semantic Web Inf. Syst, 10(4). 2015.
> LARS: A Logic-based Framework for Analyzing Reasoning over Streams. Beck, H., Dao-Tran, M., Eiter, T., Fink, M. In AAAI. 
> 
> the idea is to extend SPARQL-like semantics to include the windows and continuous evaluation.
> 
> We can also have feedback for the RSP model that already integrates the changes suggested in the last call:
> https://www.w3.org/community/rsp/wiki/Telecon_23.10.2015
> 
> 
> 
> 
> best regards,
> Jean-Paul