LUBM4OBDA Benchmark dataset

The proposed dataset is intended to be used for testing SPARQL query relaxation techniques in a way that considers a user-centric point of view. In this context, it seeks to determine how close the results of SPARQL query relaxation are to user expectations rather than focusing only on system efficiency. The dataset contains various forms of SPARQL query relaxation, including instance-based relaxation, class-based relaxation, property-based relaxation, and literal relaxation applied over RDF data and RDF ontologies. It also incorporates RDF-star annotations to support real-world use cases involving reified RDF statements and annotated RDF triples (Fakih et al., 2025).