obda

Ontop is a platform to query relational databases as Virtual RDF Knowledge Graphs using SPARQL

OpenStreetMap for the Semantic Web

GTFS-Madrid-Bench: A Benchmark for Knowledge Graph Construction Engines

Enhancing virtual KG access over tabular data with RML and CSVW

Online Mapping Editor

Material for VKG2019 tutorial at ESWC2019

Inference and Meta Knowledge Benchmarking of OBDA Systems

ontopEO is an extension of Ontop to query openEO data as a Virtual Knowledge Graph

knowledge graph application designed to integrate and reason over food-related data using a domain-specific ontology and advanced semantic techniques

Docker image for ontop OBDA framework

Ontology for wastewater and stormwater networks

This application annotate numeric columns in tabular data with properties from HDT-compressed knowledge bases.

Website for Virtual Knowledge Graph morph suite

Test OntopSpark's OBDA datatype conversions to be compliant with W3C standards

TV content knowledge graph with OWL ontology, Ontop OBDA, R2RML mapping and SPARQL queries.