Hi, Hope someone can help me over the initial hurdles I am facing with Joseki. I am trying to set up a TDB dataset in Joseki - using a directory of RDF files....
I think it's because <#lewist> rdf:type ja:DatasetTDB ; should be <#lewist> rdf:type tdb:DatasetTDB ; (All these namespaces and extending them does make it a...
... One way to improve performance is to materialize all the inferred triples and store them in the model as part of creating the data to published. That way,...
Your description isn't complete but I think all you need to do is use the "RDF/XML-ABRREV" writer. Are you printing in "RDF/XML"? That outputs very simple...
Would TDB work for you? it runs same-process as the application - it needs access to the filing system. As I understand it, you don't want to use a persistent...
With SPARQL 1.0, you can' return anything that is not in the graph because BGP matching is the only way to set a variable. With extensiosn ARQ provides, these...
Hello, I am afraid I am not very familiar with TDB - it is actually time I get acquainted with it.  But is it for triple-store databases, or is it something...
Hi, If you need to save memory, then to have thing on a file won't help that much, as this would be read and held in memory. The best solution is to use a...
Thank you Andrea and Andy, I am reading about TDB as we speak :) It looks like it might be exactly what I needed - thank you for putting me on the right path! ...
... Ah, no. The TDB directory is where the various files -- indexes, data -- that make up the TDB store are located. You can load things into it via your...
Hi, I have two quick question: TDB loader: does this work only on the default graph, or is it possible to bulk-load to named graphs ? BGP optimizer: I get the...
Hello, I am going through the SDB and TDB documentation I can find, but is there something someone could recommend with some good code examples and a tutorial...
Hi Andy, Thanks a lot for responding. On using RDF/XML-ABRREV I see one problem.. It merges one node inside the other node. i.e. say ther are 4 nodes A, B, C,...
... Add the argument --graph=<IRI> to load into a named graph. ... BGP = basic graph pattern, the bit which matches triples in sparql queries. An optimizer...
What sort of thing are you looking for? Once setup up (TDBFactory.create...), it should just be the Jena API and SPARQL query without any special TDB-isms. ...
Hi, Is there any assumption about the order of the variable names accessed in a SPARQL query through the QuerySolution.varNames() iterator? In particular,...
The query solution does not guarantee the order of varaibles but the metho Query.getResultVars does preserve it. A query solution may not have every variable...
... What is the exact command arguments you are using? I tried to recreate a call to the command line tdbloader with a --graph argument to get a NPE but...
If you want the full dataset including adding new graphs you'll need to describe a TDB dataset - you have anon-TDB dataset with a single TDB graph. TDB can...
... Yes, it will do that. The wrapper datasets has exactly the graphs described but does not allow new graphs to be implicitly created just by naming them....
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