Šejla Čebirić: Structural and Semantic Summarization of RDF Graphs

Šejla Čebirić will give a talk on Friday, April 14, at 2 pm, in the Turing building, room Grace Hopper.

Title:
Structural and Semantic Summarization of RDF Graphs

Abstract:
The Resource Description Framework (RDF) is the W3C’s graph data model for Semantic Web applications. RDF graphs are often large and heterogeneous, thus users may have a hard time getting familiar with the structure and semantics of a graph.
We consider the problem of building automatically, with no user input, compact RDF graph summaries which represent the complete structure and semantics of the graph, and are representative and accurate for a large useful dialect of SPARQL. We build out of an RDF graph, a summary of its explicit and implicit data (the latter is due to RDF semantic constraints); a summary for which this is possible is termed complete. Four novel summaries are introduced and it is shown that two of them are complete. Further, we provide a sufficient condition for RDF summarization completeness, and show that bisimulation summaries, previously studied, satisfy this condition.

 

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