1/ The data is likely wrong.
Get it working with a query string in your program exactly like the
tutorial.
You have a graph name of
in the code and
in the data. The relative URIs will be resolved to absolute ones.
Try using
path.../src/main/resources/dataset-named-graph-1.ttl>
in b
Hi Andy,
Many thanks for your support.
> To understand the algebra, I suggest looking at the code.
I cloned Jena repo and I’m now looking at the jena-arq-examples module, thanks.
> You don't need to manaipulate the algebra to build querys.
It was in the tutorial, I thought it was more performa
On 19/12/2018 12:43, Stefano Mariani wrote:
Hi Andy,
Many thanks for your prompt reply.
Mine is below.
It's OpGraph for GRAPH.
Thanks. Any documentation reference?
To understand the algebra, I suggest looking at the code.
You don't need to manaipulate the algebra to build querys. Jena
Hi Andy,
Many thanks for your prompt reply.
Mine is below.
> It's OpGraph for GRAPH.
Thanks. Any documentation reference?
I tried the code in updated gist (lines 37-41) but I get error
org.apache.jena.sparql.ARQInternalErrorException:
QueryIterGraphInner.buildIterator: Not a URI or blan
Hi there.
It's OpGraph for GRAPH.
I can't see where the dataset is loaded.
You don't get a "title" because the BGP is "?g dc:date ?date". Just
adding it to project doesn't cause it to be set.
Andy
On 19/12/2018 10:58, Stefano Mariani wrote:
Dear everybody,
I’m learning to use Jena AR
Dear everybody,
I’m learning to use Jena ARQ, and I stumbled upon the following.
I’m trying to re-create query q-ds-4.rq at
http://jena.apache.org/tutorials/sparql_datasets.html programmatically using
Sparql algebra, but I can’t find any clue in the documentation about how to add
the GRAPH par
