The tool translates mapping rules from YARRRML in a turtle-based serialization of RML or R2RML.

pip install yatter

To execute from command line run the following:

• From YARRRML to [R2]RML

python3 -m yatter -i path_to_input_yarrrml.yml -o path_to_rdf_mapping.ttl [-f R2RML]

• From [R2]RML to YARRRML

python3 -m yatter -i path_to_input_rdf_mapping.ttl -o path_to_output_yarrrml.yml [-f R2RML]

-f R2RML is an optional parameter for translating input YARRRML to R2RML (and inverse)

If you want to include the module in your implementation:

• for translating YARRRML mapping to RML mappings (and inverse):

import yatter
from ruamel.yaml import YAML
# YARRRML to RML
yaml = YAML(typ='safe', pure=True)
rml_content = yatter.translate(yaml.load(open("path-to-yarrrml")))
# RML to YARRRML
yarrrml_content = yatter.inverse_translate("rdf_mapping_content")

• for translating YARRRML mappings to R2RML mappings (and inverse):

import yatter
from ruamel.yaml import YAML

R2RML_URI = 'http://www.w3.org/ns/r2rml#'
# YARRRML to R2RML
yaml = YAML(typ='safe', pure=True)
rml_content = yatter.translate(yaml.load(open("path-to-yarrrml")), mapping_format=R2RML_URI)
# R2RML to YARRRML
yarrrml_content = yatter.inverse_translate("rdf_mapping_content", mapping_format=R2RML_URI)

• for merging TriplesMap based on id:

import yatter
list_yarrrml_mappings = ["content_mapping_yarrrml1", "content_mapping_yarrrml1"]
yarrrml_content = yatter.merge_mappings(list_yarrrml_mappings)

These are the following specifications used by the translation process:

• YARRRML: https://w3id.org/kg-construct/yarrrml
• R2RML: https://www.w3.org/TR/r2rml/
• RML: https://rml.io/spec
• RML-star: https://w3id.org/rml/star/spec
• RML-IO: https://w3id.org/rml/io/spec
• RML-FNML: https://w3id.org/rml/fnml/spec

To be implemented soon:

• RML-core: https://w3id.org/rml/core/spec
• RML-CC: https://w3id.org/rml/cc/spec

If you used Yatter in your work, please cite the ICWE2023 paper:

@inproceedings{iglesias2023human,
  title={Human-Friendly RDF Graph Construction: Which One Do You Chose?},
  author={Iglesias-Molina, Ana and Chaves-Fraga, David and Dasoulas, Ioannis and Dimou, Anastasia},
  booktitle={International Conference on Web Engineering},
  pages={262--277},
  year={2023},
  doi={10.1007/978-3-031-34444-2_19},
  organization={Springer}
}

Ontology Engineering Group:

• David Chaves-Fraga
• Marino González García (Final bachelor thesis - Systematic Testing)
• Luis López Piñero (Final bachelor thesis - v0.1)