Dear Andy,
thanks for looking into it. Too bad it doesn't work, but I can work around the problem (parsing the RDF directly in Python instead) for my current purposes, so at least we got a bug report out of it. Best, Andreas ________________________________ Von: Andy Seaborne <a...@apache.org> Gesendet: Donnerstag, 14. Februar 2019 12:17:56 An: users@jena.apache.org Betreff: Re: AW: AW: Using FROM on external RDF files in Fuseki I looked - there are a couple of problem bocking its use which need fixing: https://issues.apache.org/jira/browse/JENA-1671 Sorry about that, Andy On 13/02/2019 13:42, Andy Seaborne wrote: > Andreas, > > I'll take a look - one of the problems of running that service has been > (unsurprisingly) it getting trashed. A public endpoint reading files > from the web is a DOS vector. People trying to load DBpedia etc. (no, > that does not work!). > > (The VM it runs on is also quite locked down which may be the issue as > well). > > If you are using the apache-jena-fuseki dwn and service scripts, that is > the webapp server. The standalone form is Jetty+Fuseki as webapp. > > It will be better to run the general query endpoint in a separate server > - that isolates it from the handling of the datasets. > > Andy > > On 13/02/2019 10:51, Walker, Andreas wrote: >> Hi Andy, >> >> >> I am running Fuseki as a service (i.e. with "fuseki start"), without >> any modifications to the configuration. I have added a dataset with >> multiple named graphs through the web interface, and I tried running >> the queries through the web interface as well, although I am later >> planning to query the SPARQL endpoint via Python. >> >> >> When I try the following minimal query in >> <http://www.sparql.org/sparql.html>, it also doesn't work: >> >> >> SELECT ?s ?p ?o >> FROM <http://id.loc.gov/vocabulary/iso639-2/deu.rdf> >> WHERE { ?s ?p ?o } >> >> Do I understand you correctly that this should work? If yes, any idea >> what I might be doing wrong? And how would I tell my own server to >> allow queries like that? >> >> Thanks for your help, >> Andreas >> >> >> ________________________________ >> Von: Andy Seaborne <a...@apache.org> >> Gesendet: Mittwoch, 13. Februar 2019 11:20:16 >> An: users@jena.apache.org >> Betreff: Re: AW: Using FROM on external RDF files in Fuseki >> >> Fuseki does support loading FROM URLs from the web in the "main" version >> of Fuseki. If the service is backed by a dataset it will use the graphs >> from the dataset but there is the "general" query service as well. >> >> It is --general in Fuseki.main and that is what >> http://www.sparql.org/sparql.html >> is using. >> >> Andreas - were you looking for it in the webapp version? >> >> Andy >> >> On 12/02/2019 19:52, Charles Abela wrote: >>> Hehe >>> >>> On 12 Feb 2019 20:14, "Walker, Andreas" < >>> andreas.wal...@sub.uni-goettingen.de> wrote: >>> >>> Hi ajs6f, >>> >>> yes, what I am aiming for is what the FROM statement would do if it >>> could >>> target graphs outside my own dataset. >>> >>> The only thing I have come up with so far - as an idea, not tested - is >>> loading the RDF file into a named graph, querying it and then >>> dropping it >>> again. What I am asking is whether there is a simpler way of instructing >>> Fuseki to temporarily load that graph just for the purposes of one >>> query. >>> >>> Best, >>> Andreas >>> ________________________________ >>> Von: ajs6f <aj...@apache.org> >>> Gesendet: Dienstag, 12. Februar 2019 19:06:36 >>> An: users@jena.apache.org >>> Betreff: Re: Using FROM on external RDF files in Fuseki >>> >>> I'm not quite sure what you are asking about here: Do you mean to query >>> both a new graph and the main dataset at the same time, and to do that >>> without using anything other than SPARQL, and without loading the new >>> graph >>> into your dataset? >>> >>> >>> ajs6f >>> >>>> On Feb 12, 2019, at 10:58 AM, Walker, Andreas < >>> andreas.wal...@sub.uni-goettingen.de> wrote: >>>> >>>> Dear all, >>>> >>>> >>>> after trying for a while, I found out that Fuseki does not temporarily >>> add external RDF files to the default graph when they are included >>> through >>> a FROM statement in the SPARQL query, which was also confirmed on >>> StackExchange [1]. >>>> >>>> >>>> Since this option isn't available, is there a good way of querying an >>> external RDF file without permanently adding it to the graph by >>> loading it? >>> For example, my own graph might contain a link to an RDF file like >>> [2], and >>> I want to query that file from my application (through Fuseki), but not >>> store it in my own triple store. >>>> >>>> >>>> Any help and/or advice would be welcome, >>>> >>>> >>>> Andreas >>>> >>>> >>>> [1] >>> https://stackoverflow.com/questions/36532737/sparql-queries-with-from-clause-in-fuseki2 >>> >>>> >>>> and >>> https://stackoverflow.com/questions/54358099/fuseki-sparql-service-not-able-to-refer-to-external-rdf-resources >>> >>>> >>>> [2] http://id.loc.gov/vocabulary/iso639-2/deu.rdf >>>> <https://s> >>> >>
