Hey Andy, yeah at first we thought about doing text processing - but the triples in the current dump are not grouped in the way we want. It's just a serialization of the SQL tables. There's no way to know what graph URIs to add. That's why we want to use SPARQL match patterns.
Martynas On Mon, Sep 26, 2011 at 5:25 PM, Andy Seaborne <[email protected]> wrote: > On 26/09/11 15:16, Martynas Jusevicius wrote: >> >> Hey list, >> >> we have a dump from D2RQ currently in N-Triples format. However we >> want to group the triples into named graphs, and since D2RQ doesn't >> seem to support it, we probably need to do some post-processing. >> >> Does anyone have experience with such translation? My thought is to >> define a match pattern that would group the necessary triples >> together, and write them into named graphs with synthetic URI names >> using SPARQL Update. This would probably mean URI generation inside >> SPARQL query, but I think I've seen examples of this working in Jena? > > Yes - the URI(string) SPARQL function creates URIs from string expressions. > It must be an absolute URI. > > URI("http://example/a";) => <http://example/a> > > SPARQL Update could be used to place triples into named graphs. > > But do you need to do this? Can you use text processing to add graph URI to > the end of the lines of the NT data? > > Andy > >> >> Comments and tips and links welcome, >> >> Martynas >> semantic-web.dk > >
