## Section: New Results

### Quotient summaries of RDF graphs

We have continued and finalized our work on the question of efficiently computing informative summaries of large, heterogeneous RDF graphs. Such summaries simplify the users' efforts to understand and grasp the content of an RDF graph with which they are not familiar. For instance, Figure 1 shows the summary constructed fully automatically out of a benchmark graph of a bit more than 100 million triples.

We have presented, together with co-authors, a tutorial on the problem of summarizing RDF graphs, at the EDBT 2019 conference [21].

We have demonstrated new algorithms for efficiently building RDF quotient summaries out of large RDF graphs, in an incremental fashion, in [19].

Last but not least, a VLDB Journal submitted article systematizing most of our contributions in this area has been accepted (pending a minor, strictly cosmetic revision which will be sent out in January 2020).