# Definitions of declarative transformation functions using the Functions Ontology

We follow the Function Ontology to define transformation functions that are using in the rml mappings for improving the data quality of a Knowledge Graph Creation process.

The repository is opened for contributions.

- SQL functions defined by OEG (UPM)
- GREL functions defined by IDLab (UGhent)


## Contact

David Chaves-Fraga (dchaves@fi.upm.es)