WissKI needs a triple store as a RDF graph database. We recommend Ontotexts GraphDBfree. You have to register on the website to get your downloadfile, but the software itself is free of charge.
As soon as you receive your download email, you can install GraphDB as a desktop Installation or a stand alone server. For Ubuntu 20.04 just download the *.deb package and install it. After the installation you can start GraphDBfree and open the workbench at
http://localhost:7200 if you are on your localhost.
On the GraphDB Workbench, click on Setup Repositories Create new repository, select GraphDB Free, enter your repository-id a administrative name in the Discription field and select no inference as the ruleset. Click Create and note your repository-endpoint .
Configure WissKI Salz Adapter
Go to Configuration WissKI Salz Adapters and click on + Add WissKI Salz Adapter. Select Sparql 1.1 With Pathbuilder. Enter an repository-id as your Adapter Name, and check Preferred Local Store. Fill the field Endpoint URI for reading with your repository-endpoint and the field Endpoint URI for writing with repository-endpoint /statements. As default-graph-uri , enter a unique namespace related to your project or site. Click Save.