Re: Using Jena for OBDA to access non-relational datastores

2016-01-08 Thread Andy Seaborne
http;//d2rq.org/ is dynamic and translates at query time. On 08/01/16 16:33, Benedikt Tröster wrote: Hello everyone, I know Jena is not exactly made for OBDA, but I guess you could achive sth. that is very close to what I want to do: I have an ontology for a process inside the medical domain. T

Re: CONSTRUCT + Blank nodes

2016-01-08 Thread Andy Seaborne
To make a connection here ... SHACL [*] seems to have a similar issue; it needs to apply shape constraints to resources which are potentially bnode-subject structures. [*] http://www.w3.org/TR/shacl/ On 06/01/16 16:50, Paul Houle wrote: This is a simple scenario, I can accomplish the specif

Re: Using Jena for OBDA to access non-relational datastores

2016-01-08 Thread Claude Warren
Benedikt, There are a number of ways to achieve this. It is possible to create an instance of Graph. Assuming you only want to read (not write) the documents via the Jena interface this would be fairly straight forward as you could extend the GraphBase class (org.apache.jena.graph.impl.GraphBase

Re: question about TDB loader of Jena-Fuseki

2016-01-08 Thread Andy Seaborne
You can use the simpler tdbloader --loc DIRECTORY files where DIRECTORY is the database location. tdbloader only works on a complete TDB datasets so while you can pass the assembler in as Adam and Osma say, you can also load (all tdbloader is going to do is unpick the assembler built de

Re: Using Jena for OBDA to access non-relational datastores

2016-01-08 Thread kumar rohit
I am new to Ontop but I think it is suitable here in this scenario and you can then use owl API implemented as maven. Best regards On Fri, Jan 8, 2016 at 4:33 PM, Benedikt Tröster < troes...@stud.uni-heidelberg.de> wrote: > Hello everyone, > > I know Jena is not exactly made for OBDA, but I gues

Using Jena for OBDA to access non-relational datastores

2016-01-08 Thread Benedikt Tröster
Hello everyone, I know Jena is not exactly made for OBDA, but I guess you could achive sth. that is very close to what I want to do: I have an ontology for a process inside the medical domain. The idea is to use the ontology and query for the instances of data (which are located inside doc, xls fi

transactions and docProducers

2016-01-08 Thread Chris Dollin
Dear All (Not sure if this is really an @dev or @users question) When Fuseki handles a query (or update), is that query (or update) handled by a single thread or might it be handled by multiple threads over the lifetime of the query (or update)? I ask because * we have a TextDocProducer implem

Re: CONSTRUCT + Blank nodes

2016-01-08 Thread Martynas Jusevičius
Blank nodes are local to the graph. Why don't you relabel them as URIs and the problem should go away? (if I understood your use case correctly) On Wed, Jan 6, 2016 at 5:50 PM, Paul Houle wrote: > This is a simple scenario, I can accomplish the specific thing I am trying > to di by other means,

Re: question about TDB loader of Jena-Fuseki

2016-01-08 Thread Osma Suominen
Dear Sandor, You can use the same .ttl file that you used for the Fuseki database and text index configuration, i.e. the one documented here: https://github.com/NatLibFi/Skosmos/wiki/InstallFusekiJenaText#configuration -Osma On 08/01/16 16:12, Sandor Kopacsi wrote: Dear Support List, We are

Re: question about TDB loader of Jena-Fuseki

2016-01-08 Thread A. Soroka
Jena Assemblers are recipes (written in RDF) for constructing RDF stores: https://jena.apache.org/documentation/assembler/index.html https://jena.apache.org/documentation/assembler/assembler-howto.html You will use a set of RDF vocabularies to write RDF describing how you want TDB to ingest your

question about TDB loader of Jena-Fuseki

2016-01-08 Thread Sandor Kopacsi
Dear Support List, We are at the University of Vienna developing an archiving system where we are going to use Jena-Fuseki (and a tool, called Skosmos based on that) for storing and displaying data sets for classifications. We had problems with uploading the RDF file to Fuseki through the memor

CONSTRUCT + Blank nodes

2016-01-08 Thread Paul Houle
This is a simple scenario, I can accomplish the specific thing I am trying to di by other means, but if I can get this to work it leads to a strategy inspired by SPIN, I'm showing it though because it is a simple and clear example. I have two graphs, G1: [] a :DatasetArtifact ; :name e:tdb