SPARQL View Unfold answers SPARQL 1.2 queries posed over views, by rewriting them into queries over the data those views are defined on. Views are SPARQL CONSTRUCT queries that get unfolded into the user query, after which a pipeline of optimisations produces a query any SPARQL engine can answer. This allows, for example, running SPARQL 1.2 queries over RDF 1.1 data.

Traqula is a highly flexible TypeScript framework for parsing, transforming, and generating structured languages, with an initial focus on the SPARQL query language. It ships pre-built engines for SPARQL 1.1 and 1.2, and lets you customise parsers, transformers, and generators through a builder pattern.

Comunica is a knowledge graph querying framework for JavaScript, enabling flexible SPARQL and GraphQL querying over decentralized RDF on the Web. Its modular architecture allows engines to be assembled from independent building blocks, making it a platform for research on query processing.

OR-Set RDF Store is a proof-of-concept RDFjs-compliant triple store implementing an add-wins OR-Set CRDT. It lets multiple clients read and write the same RDF graph concurrently, even while offline, and later reconcile their changes over HTTP without conflicts. The CRDT metadata is stored inline using RDF 1.2 triple terms.

Mush ID is a progressive web app that allows you to identify mushrooms native to Belgium and the Netherlands. It takes the idea of a field guide and makes it digital. In this digitalisation, I saw the potential to handle the uncertainty that comes with identifying mushrooms.

Plan-A is a flutter based web app that allows parents to track day-to-day progress of their children with Autism Spectrum Disorder. For the children, it not only provides them with a visual schedule, but also empowers them throughout the day.

In this project, I helped with the development and deployment of the Rust backend.