I mean ?date everywhere...
On Tue, Sep 27, 2011 at 5:04 PM, Martynas Jusevicius <[email protected]> wrote: > Hey Andy, > > I'm trying to implementing it now, and wondering if the whole > transformation could be packed into one SPARQL Update query? I mean > both the matching and the graph creation and insertion. > > I tried the following: > > CREATE GRAPH IRI(fn:concat('http://host/graphs/', string(?date))); > INSERT { > GRAPH IRI(fn:concat('http://host/graphs/', string(?date))) > { > ?post dct:created ?data > # more > } > } > WHERE { > ?post dct:created ?data > # more > } > > but I get a parse error where IRI() is: > Was expecting one of: > <IRIref> ... > <PNAME_NS> ... > <PNAME_LN> ... > > at > com.hp.hpl.jena.sparql.lang.ParserARQUpdate._parse(ParserARQUpdate.java:58) > ... > > Or will I have to retrieve the match results first and then iterate > them to create named graphs? > > 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 >> >> >
