ckanext-dcat

ckanext-dcat

Ckanext-dcat is a CKAN extension that helps data publishers expose and consume metadata as serialized RDF documents using DCAT.

This extension is currently supported in CKAN 2.10 and CKAN 2.11.

[!IMPORTANT] Read the documentation for a full user guide: https://docs.ckan.org/projects/ckanext-dcat

Overview

In terms of CKAN features, this extension offers:

• Pre-built CKAN schemas for common Application Profiles that can be adapted to each site requirements to provide out-of-the-box DCAT support in data portals, including tailored form fields, validation etc. (currently supporting DCAT AP v1, v2, and v3).

• DCAT Endpoints that expose the catalog datasets in different RDF serializations (dcat plugin).

• An RDF Harvester that allows importing RDF serializations from other catalogs to create CKAN datasets (dcat_rdf_harvester plugin).

• Other features like Command Line Interface, support for indexing in Google Dataset Search or endpoints for exposing datasets in the Croissant ML format.

These are implemented internally using:

• A base mapping between DCAT and CKAN datasets and viceversa (compatible with DCAT-AP v1.1, DCAT-AP v2.1 and DCAT-AP v3).

• An RDF Parser that allows to read RDF serializations in different formats and extract CKAN dataset dicts, using customizable profiles.

• An RDF Serializer that allows to transform CKAN datasets metadata to different semantic formats, also allowing customizable profiles.

Running the Tests

To run the tests do:

pytest --ckan-ini=test.ini ckanext/dcat/tests

Note that there are tests relying on having ckanext-harvest, ckanext-scheming and ckanext-fluent installed.

Releases

To create a new release, follow these steps:

• Determine new release number based on the rules of semantic versioning
• Update the CHANGELOG, especially the link for the “Unreleased” section
• Update the version number in setup.py
• Create a new release on GitHub and add the CHANGELOG of this release as release notes

Acknowledgements

Work on ckanext-dcat has been made possible in part by:

• the Government of Sweden and Vinnova, as part of work on Öppnadata.se, the Swedish Open Data Portal.
• FIWARE, a project funded by the European Commission to integrate different technologies to offer connected cloud services from a single platform.

If you can fund new developments or contribute please get in touch.

Copying and License

This material is copyright © Open Knowledge.

It is open and licensed under the GNU Affero General Public License (AGPL) v3.0 whose full text may be found at:

http://www.fsf.org/licensing/licenses/agpl-3.0.html