Hi Chris Chris Clarke wrote: > I'm trying to load some data into named graphs in TDB and then query back > with Fuseki. Perhaps I am doing something ridiculously stupid here having > never worked with quads and named graphs before.... > > For my test case I have about 5 million quads I am trying to load into one > named graph, here is a sample of some: > > <http://example.com/sections/FFF9AF7F-54DF-53A5-E2A1-E08F4F7C270F> > <http://www.w3.org/1999/02/22-rdf-syntax-ns#_8> > <http://example.com/items/6226E191-0A32-F348-8F38-AABDBC73EE83> > <http://example.com/> . > <http://example.com/sections/FFF9AF7F-54DF-53A5-E2A1-E08F4F7C270F> > <http://www.w3.org/1999/02/22-rdf-syntax-ns#_9> > <http://example.com/items/0FBFA283-11EB-1A04-1F68-F8B36E03F932> > <http://example.com/> . > <http://example.com/sections/FFF9AF7F-54DF-53A5-E2A1-E08F4F7C270F> > <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> > <http://purl.org/vocab/resourcelist/schema#Section> <http://example.com/> . > <http://example.com/sections/FFF9AF7F-54DF-53A5-E2A1-E08F4F7C270F> > <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> > <http://www.w3.org/1999/02/22-rdf-syntax-ns#Seq> <http://example.com/> . > > What I would expect is that each of these quads get loaded into a graph named > <http://example.com/> > > Using tdbloader2, I successfully loaded these into a fresh TDB database > location. > > Start Fuseki 0.2.1-snapshot using this manifest: > > @prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> . > @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . > @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . > @prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> . > @prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> . > > [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" . > tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset . > tdb:GraphTDB rdfs:subClassOf ja:Model . > > <#dataset> rdf:type tdb:DatasetTDB ; > tdb:location "/tmp/DBQ-test" ; > . > > I try and submit this test query via the Fueski web interface > (http://myfusekiserver:3030/sparql.jsp): > > select count(?s) > from named <http://example.com/> > where {?s ?p ?o} > > Fuseki says: > > Error 400: Query may not include a dataset description (FROM/FROM NAMED)
We have recently seen Tim asking a similar question (with a similar error). This is the relevant thread: http://markmail.org/message/igbs7uxlx5xtooyz As a work around, you could use this as an alternative: SELECT COUNT(?s) { GRAPH <http://example.com/ { ?s ?p ?o } } Does this work for you? > > > Fuseki - version 0.2.1-SNAPSHOT (Date: 2011-09-08T16:38:26+0000) > > Aside: I ran tdbstats on the location where I loaded the quads, I got the > results I would expect in the stats.opt file: > > (stats > (meta > (timestamp > "2011-10-13T10:22:47.351+00:00"^^<http://www.w3.org/2001/XMLSchema#dateTime>) > (run@ "2011/10/13 10:22:47 UTC") > (count 5669532)) > (<http://purl.org/vocab/resourcelist/schema#created> 5037) > (<http://purl.org/vocab/resourcelist/schema#uri> 21071) > (<http://lists.talis.com/schema/appConfig#feedbackFunction> 1) > (<http://purl.org/dc/terms/created> 144982) > .... > > Thus I would assume my TDB dataset has the correct data in it... Perhaps my > manifest file is not correct? I don't think that is the problem. Paolo > > Thanks, > > Chris > >
