Research

SPARQL Federated Query Processing

Can we still execute queries when the number of Knowledge Graphs increases? First, we created a new benchmark called FedShop that tests the scalability of existing engines in terms of the number of sources. Second, we created a new SPARQL federation engine that finds better source assignment than existing engines.

Enterprise Knowledge Graphs and Retrieval

The prior RAG system relied on hard-coded legal rules, reducing flexibility and increasing maintenance. By building a knowledge-graph-based retrieval system using a domain ontology and RDB-to-RDF mappings, we replaced these rules, achieving comparable performance through graph-based retrieval and embeddings.