… graphs introduce unique requirements when aggregating the data. In this work, we propose
Gagg, an RDF graph aggregation operator … We provide a formal definition of Gagg on top of …

… aggregation graph (GAG) that exploits incremental computation. A GAG is composed of nodes
that maintain the aggregate … [52]: we traverse the operator tree and append instructions to …

… resentations, ie, using morphological image operators or graph neural networks to extract the
connectivity between different roads within the … into a globally consistent lane graph Gagg. …

… subquery blocks and aggregates. First, we show how to construct query graphs for these …
the graft and prune operators on trees by the G-Join and GAgg operations on relations. Then…

… operator, an attention operator, a pooling operator, etc. Jk(·) is a differentiable graph mapping
which transforms the aggregated graph … the ClusterGCN graph convolutional operator [21]. …

… The third part also describes a proposal to extend SPARQL with a graph aggregation
operator that is part of RDF.co, the data model described in this thesis. The next subsections …

… GAG and pGCG are taken as the graph-structured data inputs for DtGNN, denoted as
DtGNN-GAG … noise if a well-designed aggregation GNN operator is not available. In contrast, the …

… Gait Age and Gender dataset (MMU GAG). Next, the body joint … as compact gait graphs via
a novel part aggregation scheme. … a part aggregation scheme that groups the body graph into …

… GAG dataset contains less than 1000 instances (Table 6.1). … As we can see from the graph,
Strabon seems to be faster for … The parameters of a aggregation operator are the following: …

… Gagg [18] introduces an RDF graph aggregation operator that is both expressive and … an
algorithm to answer graph aggregation queries. Gagg achieves significant improvements in …