multi-user access control

[jmvanel]

One use case is switching to a classical CMS workflow, where article proposals are only visible by content managers.

User U1 must not be able to access data of user U2. We don't need for now a complete Access Control mechanism, like in Virtuoso. A simple API must give access to a Banana-RDF graph store ( dataset ) that contains only data of user U1, and contains also background knowledge and ontologies. This way, it is not possible that a badly writen SPARQL query accesses data of other users. This API could leverage on this utility to create such an in-memory graph store:

trait DatasetUtils[Rdf <: RDF]
    extends DatasetFactory
    with RDFOpsModule {

  /** merge given datasets */
  def merge(datasets: Seq[Dataset]) : GraphStore[Rdf, Try, Dataset]= {

This API could be:

    def makeUserDataset( userURI:string ) : GraphStore[Rdf, Try, Dataset]

[jmvanel]

There is a nice security implementation for Jena, that work as a interceptor wrapper that calls an application provided check for graph and then for each triple :
https://jena.apache.org/documentation/security/

This URL has disappeared, but there is:
https://jena.apache.org/documentation/permissions/
and this in Fuseki: https://jena.apache.org/documentation/fuseki2/fuseki-security.html

The performance is of course diminished, but not too much if putting restrictions at graph level only.
This wrapper architecture could be put into Banana-RDF .

[jmvanel]

What has been done for project https://github.com/jmvanel/corporate_risk should be made modular and reusable.

[jmvanel]

This use case surfaced recently;

• Have a named graph, or a separate database, per user for private data (in addition to the named graph for his/her public data that is already in use)
• Have an admin account, which can see everything
• Keep the possibility for the user X to annotate the data of Y, but without being able to remove from data créeated by Y
• Visualize in the views (and services / form, / form-data, ...) the origin of these triplets annotated by others