https://github.com/dalito/dcat-in-linkml
An experiment to derive LinkML models for DCAT2 and DCAT3 automatically
https://github.com/dalito/dcat-in-linkml
dcat dcat-ap linkml
Last synced: 2 months ago
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An experiment to derive LinkML models for DCAT2 and DCAT3 automatically
- Host: GitHub
- URL: https://github.com/dalito/dcat-in-linkml
- Owner: dalito
- License: mit
- Created: 2024-08-15T22:41:13.000Z (9 months ago)
- Default Branch: main
- Last Pushed: 2024-08-19T23:01:54.000Z (9 months ago)
- Last Synced: 2025-01-07T10:30:12.350Z (4 months ago)
- Topics: dcat, dcat-ap, linkml
- Language: Jupyter Notebook
- Homepage:
- Size: 336 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# DCAT in (to) LinkML
An experiment to create a linkML model that matches dcat 2.2 and dcat 3 from dcat specification in rdf.
DCAT as Owl ontology in RDF:
- DCAT, Version 2:
- Specification, v2.2: https://www.w3.org/ns/dcat#
- Turtle file url: https://www.w3.org/ns/dcat2.ttl
- DCAT, Version 3: https://www.w3.org/standards/history/vocab-dcat-3/ (RDF serializations are in [DXWG GitHub repository](https://github.com/w3c/dxwg/tree/gh-pages/dcat/rdf))
- Latest version: https://www.w3.org/TR/vocab-dcat-3/
- Turtle file url: https://raw.githubusercontent.com/w3c/dxwg/gh-pages/dcat/rdf/dcat3.ttl (Proposed recommendation 2024-06-13, but file is last changed 2023-02-02)
Here we try a conversion with [schema-automator](https://github.com/linkml/schema-automator) from the linkML team.
First, create a virtual environment and install schema-automator.
```cmd
py -3.12 -m venv .venv
.venv/scripts/activate
pip install schema-automator notebook
```
The exact versions of all packages used are documented in `requirements_frozen.txt` (created by `pip freeze > requirements_frozen.txt`).
With schema-automator it is possible to import from a schema-style OWL ontology. This must be in functional syntax which can be created with [robot](https://robot.obolibrary.org/) ahead of time:
```cmd
robot convert -i dcat-source-rdf/dcat2.ttl -o dcat-source-rdf/dcat2.ofn
schemauto import-owl dcat-source-rdf/dcat2.ofn -o linkML/dcat2.yaml
```
See [linkml/README.txt](linkml/README.txt) for details of the conversion process. The obtained LinkML models (in yaml) are in [linkml/](linkml/).
**This is only a first experiment without any validation or polishing.**
It demonstrates the outcome of using standard commands/tools without tweaking options.