Hi Andy and Jena,
So glad to see you here.
I just upload my code to GitHub
https://github.com/analyticservicedev/dgraph-jena
<https://github.com/analyticservicedev/dgraph-jena>
It’s short and a little dirty .
I have `class DgraphTripleTable implements TripleStore`.
And do CRUD with add() delete() find() or findXxxMethods()
Then I have DgraphTripleTable in `class StorageDgraphDB implements
StorageRDF`
And then wrap the StorageDgraphDB with ds= DatasetFactory.wrap(db);
Finally, I have FusekiServer.create().add("/ds",
ds).port(6384).build().start()
I have a test file in src/test/java/com/jena/app/Inf.java
There are three methods named main tdbmain memoryMain
for different storage backend: Dgraph 、 TDB、 Memory
Could you check my code and give me some advice to help me make it run?
Thank you very much.
> On Jan 12, 2022, at 9:45 PM, Andy Seaborne <a...@apache.org> wrote:
>
>
> On 12/01/2022 09:10, brain wrote:
>> Hello,
>> I need some help.
>> With this guide,
>> https://jena.apache.org/documentation/fuseki2/fuseki-embedded.html,
>> <https://jena.apache.org/documentation/fuseki2/fuseki-embedded.html,>
>> I created an embeded-fuseki server to provide a SPARQL service .
>> I make an implemention of `org.apache.jena.dboe.storage.StorageRDF`
>> interface in Java, so I can store rdf triples with my own storage engine(a
>> distributed database). And it works. I can query the rdfs with SPARQL.
>> However, I have some problems.
>> When I try to change my model to a `InfGraph` , the reasoner can't
>> works. It must be some bugs in my code. but I can't find it .
>> Is there any guide or something else to help me fix the bug .
>> Our data stored in a distributed database. We want to do SPARQL Query
>> and Inference.
>> Thanks
>
> Hi there,
>
> Could you give some details of your setup?
>
> + How do you query with RDFS?
>
> + What level of inferencing are you setting for the InfGraph?
>
> + Are you using an assembler or setting up the InGraph with code?
>
> If it is RDFS you are wanting, there's a different approach that might work
> better for you:
>
> https://jena.apache.org/documentation/rdfs/
>
> This is fixed schema, data-centric (so it is not full RDFS reasoning - there
> are no axiomatic triples, and iyt assumes that vocabulary like subproperty or
> subclass isn't being subproperty'ed.)
>
> But keeps no in-memory state from the data itself so it scales and you can
> directly update the data and see new inferred triples.
>
> Andy
>
