I don't believe there's a custom notification arrangement for InfModels
so indeed you'd have to attach the listener to both the base model and
the deductions model.
For pure forward chaining rules that should be sufficient.
If you are using backward chaining rules, or the hybrid rule system (as
used for the all the default configurations for RDFS and OWL), then it's
not possible to get notifications for everything. In those setups then
some of the triples you see from listStatements have been implicitly
generated on-demand prompted by the query pattern and are never
materialized or stored anywhere and so can't trigger a listener.
Dave
On 20/09/2020 15:13, Jenson Joseph wrote:
HI,
I'm hoping I could get some help on this. I have an InfModel that I add a
listener to where I'm looking for all changes to the model, whether it was
inferred or not. On the model, I only get notified of changes that were
directly added, inferred changes are not notified. I switched to listening to
the deductions model and I don't get any notifications when I add new
statements.
I tried using combinations of the .rebind, .reset, .prepare functions with no
luck and I searched the internet on this with no luck.
I know the inferences are being made because they show up if I list the
statements of the inference model. I would like to know if it is currently
possible to have a listener that receives all changes made to n InfModel. The
reason for this is I want to keep track of the incremental changes and perform
queries on a small subset of the model. If I do the queries on the entire model
it would be more expensive while returning redundant results that have already
been seen and processed.
If this is an expected use case in Jena, that's handled differently I'm open to
hearing about that but I would love to have this meticulous listener within the
InfModel if you can help me figure that out.
Thanks,
Jenson
