Knowledge Bases

Every Knowledge Base is an RDF Model, which is a set of RDF statements of subject, predicate and object.

Knowledge Base Window

The main function of the Knowledge Base Window is to do actions on model scope. This window lists all models where you have at leat read access.

By using the context menu of a model, you can choose from one of these actions.

Select a Knowledge Base

This is the default action. If you select a Model, every action in the current session uses this model. This means, if you select the SPARQL shell afterwards and query the model, your query will be evaluated in that model.

Delete the Knowledge Base

If you have access for the action “Model Management” and write access to that model, you can delete that model. If you delete a model, all statement, the popularity, the ratings and the cache of that model will be deleted.

Export the Knowledge Base as RDF/XML

This is a link to the RDF/XML representation of that model. You can download the XML file or put the link to another Semantic Web application.

Additional to these model specific actions, you can choose these actions from the context menu of the Knowledge Base Box (the white circle):

Show / Hide Hidden Knowledge Bases

This Feature is not implemented yet. You can hide a model by setting the attribute SysOnt:hidden to true. By default, hidden models are not displayed in the Knowledge Bases Window. You can choose “Show Hidden Knowledge Bases” in the window context menu to show all hidden models.

Create a new Knowledge Base

If you have access for the action “Model Management”, you can create a new Knowledge Base here.
You can choose from these options:

• Create an empty Knowledge Base
• Import an RDF document from the Web
• Import a local RDF document by uploading it 
• Paste RDF/XML source code to a text box

You have to provide a resource identifier (URI) for your new model. The name of the model, which is displayed in the Knowledge Bases Window, is taken from the model itself (e.g. an rdf:label).