Morph-KGC is an engine that constructs RDF knowledge graphs from heterogeneous data sources with the R2RML and RML mapping languages. Morph-KGC is built on top of pandas and it leverages mapping partitions to significantly reduce execution times and memory consumption for large data sources.

Features

• Supports the R2RML and RML mapping languages.
• User-friendly mappings with YARRRML.
• Transformation functions with RML-FNML, including Python user-defined functions.
• RDF-star generation with RML-star.
• RML views over tabular data sources and JSON files.
• Integration with RDFLib and Oxigraph.
• Optimized to materialize large knowledge graphs.
• Remote data and mapping files.
• Input data formats:
  • Relational databases: MySQL, PostgreSQL, Oracle, Microsoft SQL Server, MariaDB, SQLite.
  • Tabular files: CSV, TSV, Excel, Parquet, Feather, ORC, Stata, SAS, SPSS, ODS.
  • Hierarchical files: JSON, XML.
  • In-memory data structures: Python Dictionaries, DataFrames.
  • Cloud data lake solutions: Databricks.

Organizations That Use Morph-KGC

Licenses

Morph-KGC is available under the Apache License 2.0.

The documentation is licensed under CC BY-SA 4.0.

Author

• Julián Arenas-Guerrero - julian.arenas.guerrero@upm.es

Ontology Engineering Group, Universidad Politécnica de Madrid.

Citing

If you used Morph-KGC in your work, please cite the SWJ paper:

@article{arenas2022morph,
  title   = {{Morph-KGC: Scalable knowledge graph materialization with mapping partitions}},
  author  = {Arenas-Guerrero, Julián and Chaves-Fraga, David and Toledo, Jhon and Pérez, María S. and Corcho, Oscar},
  journal = {Semantic Web},
  year    = {2022},
  doi     = {10.3233/SW-223135}
}