Agastya Research

Research


Projects


The SPARQL-Gremlin compiler (Gremlinator), transforms SPARQL queries into Gremlin traversals. It bridges the query interoperability gap between the RDF data model and Property graph data model (github, Apache Tinkerpop reference documentation). 

It is a java application to transform RDF databases into Property Graph (PG) databases. RDF2PG implements three transformation methods described in the journal article "Mapping RDF Databases to Property Graph Databases" (IEEE Access, May 2020), which is available at  (publication, github).

LITMUS Benchmark Suite, is an open extensible framework for benchmarking a plethora of RDF and Property graph Data Management Systems (website, github, docker).



Publications



Conference Articles & Industry White Papers:

  • Harsh Thakker. "The Landscape of Cloud-based Semantic and Property Graph Databases" published by OSTHUS GmbH (2022) [paper]

  • Harsh Thakker. "Let’s talk about Graph Data models and why they are relevant for your Data and IT Strategy" published by OSTHUS GmbH (2022) [paper]

  • Joan, Plepi, Endri Kacupaj, Kuldeep Singh, Harsh Thakkar, and Jens Lehmann. "Context Transformer with Stacked Pointer Networks for Conversational Question Answering over Knowledge Graphs" In Proceedings of the 18th ESWC, (2021) [pub] 

  • Endri Kacupaj, Joan Plepi, Kuldeep Singh, Harsh Thakkar, Jens Lehmann, and Maria Maleshkova. "Conversational Question Answering over Knowledge Graphs with Transformer and Graph Attention Networks" In Proceedings of the 16th EACL, (2021). [pub]

  • Harsh Thakkar, Renzo Angles, Marko Rodriguez, Stephen Mallette, and Jens Lehmann. "Let’s Build Bridges, not Walls – SPARQL Querying of TinkerPop Graph Databases with sparql-gremlin" in Proceedings of the 14th IEEE ICSC, (2020). [Best Resource Paper Award, pub]


Journal Articles:


  • Renzo Angles, Harsh Thakkar, and Dominik Tomaszuk. "Mapping RDF Databases to Property Graph Databases" in Proceedings of the IEEE Access, Vol. 8 (2020) [pub] 

  • Dominik Tomaszuk, Renzo Angles, and Harsh Thakkar. "PGO: Describing Property Graphs in RDF" in Proceedings of the IEEE Access, Vol. 8 (2020) [pub]


Workshop/Demo Papers:


  • Renzo Angles, Harsh Thakkar, and Dominik Tomaszuk. "RDF and Property Graphs Interoperability: Status and Issues" To appear in the proceedings of the 13th Alberto Mendelzon Workshop (AMW) on Foundations of Data Management, (2019). [pub] 

  • Harsh Thakkar, Sören Auer, and Maria-Esther Vidal. "Formalizing Gremlin Pattern Matching Traversals in an Integrated Graph Algebra" in Proceedings of the 2nd International Contextualised Knowledge Graph workshop (CKG) of the International Semantic Web Conference (ISWC), (2019). [pub] 

  • Vinh Nguyen, Hong Yung Yip, Harsh Thakkar, Qingliang Li, Evan Bolton, and Olivier Bodenreider. "Singleton Property Graph: Adding A Semantic Web Abstraction Layer to Graph Databases" in Proceedings of the 2nd International Contextualised Knowledge Graph workshop (CKG) of the International Semantic Web Conference (ISWC), (2019). [pub]


Note: A full list of publications can be referred by visiting the Google Scholar profile of the corresponding authors such as Dr. Harsh Thakker, Dharmen Punjani, etc.