[PlanetKR] NMR Online Seminar – Next Talk on October 22 by Vanina Martinez

[Jonas Haldimann]

      NMR Online Seminar


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What?    Next talk in the NMR online talk series by Vanina Martinez
When?    Wednesday, 22. October 2025, 16:00 CEST (UCT+2)
Where?   Online (Zoom): 
https://uct-za.zoom.us/j/92600685092?pwd=ErqWWWKrljbjxLi0CNsgEZr4WR7ZHN.1

https://nmrseminar.krportal.org/
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We are happy to announce that the NMR online talk series restarts after 
the summer break with a talk given by
*Vanina Martinez* (IIIA-CSIC, Spain)
    on *Wednesday, 22. October 2025*, 16:00 CEST:

Making Sense of Messy Graphs: Addressing Uncertainty in Data-Graphs
Graph databases are becoming widely successful as data models that allow 
for effective representation and processing of complex relationships 
among various types of data. Data graphs are a particular type of graph 
database whose representation enables both data to values in the paths 
and in the nodes to be treated as first-class citizens by the query 
language. As with any other type of data repository, data graphs may 
suffer from errors and discrepancies with respect to the real-world data 
they intend to represent.
In this talk, I will present part of the work we have been doing 
exploring the notion of probabilistic unclean data-graphs, to capture 
the idea that the observed (unclean) data-graph is actually the noisy 
version of a clean one that correctly models the world, but that we know 
only partially. As the factors that lead to such a state of affairs may 
be many, e.g., all different types of clerical errors or unintended 
transformations of the data, and depend heavily on the application 
domain, we assume an epistemic probabilistic model that describes the 
distribution over all possible ways in which the clean (uncertain) 
data-graph could have been polluted. Based on this model, we define two 
computational problems: data cleaning and probabilistic query answering, 
and study their computational complexity and limitations.

The talk will be given via Zoom.

The plan of this series to have a talk roughly once per month. If you 
are interested in learning the next speakers, please visit the website at
https://nmrseminar.krportal.org/

We are still looking for speakers for future talks. If there is 
something you would like to present in this seminar series, please do 
not hesitate to contact us.

Kind regards,
Jonas and Giovanni


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