Re: [rdf4j-dev] Query bnode

[Jeen Broekstra <jeen.broekstra@xxxxxxxxx>]

We don't support this kind of thing directly in SPARQL. 

However, there is a workaround you can use, which is to add a binding to a BNode via the API instead:

    TupleQuery query = conn.prepareTupleQuery("select * where { ?a ?b ?c }");
    query.setBinding("a", bnode);

The usual caveats about the scope of bnode identifiers and over-reliance on them remaining stable apply :)

Jeen

On Sat, Feb 16, 2019 at 6:27 AM Håvard Ottestad <hmottestad@xxxxxxxxx> wrote:

Hi,

I’m wondering if there is a way of querying a bnode?

I’m used to the following working from working with Stardog:

select * where {<_:bnode1> ?b ?c}

Any way of doing something similar in rdf4j directly? I realised that the SHACL sail is fairly broken when working with bnodes because of its use of SPARQL.

Cheers,
Håvard
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