On Wed, 26 Aug 2015 at 21:15 Andy Seaborne <[email protected]> wrote: > On 26/08/15 10:24, Kim A. Jakobsen wrote: > > Hi > > > > I have created a property table and I would like to query it using > SPARQL. > > My code looks as follows: > > > > PropertyTable propertytable = new PropertyTableArrayImpl(1, 1); > > Column something = propertytable.createColumn(NodeFactory.createURI(" > > http://example.org/"; + "something")); > > Row row = propertytable.createRow(NodeFactory.createURI(" > http://example.org/"; > > + "apple")); > > row.setValue(something, NodeFactory.createLiteral("JOHN")); > > > > How do I query the property table? > > Hi there, > > You can make the property table appear as an RDF graph with > > GraphPropertyTable > > and make that a model > > ModelFactory.createModelForGraph > if you want to. > > You can query it with SPARQL or the RDF API. > > Andy > > > > > Additionally then I would also like to make my property table persistent, > > i.e. save it to the disk. > > As fare as I know then it is only possible to save it as a CSV file, is > > there any other options? > > You can write the RDF graph. > I suspect that if I simply write the model to the disk it will save it in a statement table and not in a property table, how does it actually work? I would like to play around with different indexes for the property table but I do not know how much is implemented in Jena already.
Thanks Kim In fact, what might work for you is to convert the CSV file with > riotcmdx.csv2rdf and work in RDF from there on. > > Andy > > > Regards > > Kim A. Jakobsen > > > >
