ckanext-kgcreation

ckanext-kgcreation is a CKAN plugin that adds the ability to generate RDF triples from datasets, services, resources, and organization. KGCreation uses SDM-RDFizer (https://github.com/SDM-TIB/SDM-RDFizer) as a knowledge graph creation engine.

Installation

To install ckanext-kgcreation:

1. Activate your CKAN virtual environment, for example:

   . /usr/lib/ckan/default/bin/activate
   

2. Install the ckanext-LDM_SPARQL Python package into your virtual environment:

   pip install ckanext-kgcreation
   

3. Add kgcreation to the ckan.plugins setting in your CKAN config file (by default the config file is located at /etc/ckan/default/ckan.ini).

4. Set up Enviroment Variables in the .env file. CKAN_KG_DOMAIN sets the value for the Domain of knowledge graph. ENDPOINT_URL sets the value of the url of the endpoint. For ENDPOINT_URL, only add the domain (i.e. http://localhost), the port will be added in the code.

5. When using the Docker image for CKAN and a docker container endpoint, replace the line 40 in file Virtuoso_Util.py:

   self.virtuosoGraph = config.get("LDMSPARQL_ENDPOINT_GRAPH", os.environ.get('CKAN_KG_DOMAIN') + ':8890/')
   

   with:

   self.virtuosoGraph = config.get("LDMSPARQL_ENDPOINT_GRAPH", 'http://endpoint:8890/')
   

   endpoint is the variable in docker-compose that represents the endpoint.

6. Restart CKAN. For example if you've deployed CKAN with Apache on Ubuntu:

   sudo service apache2 reload