Hi there, thank you for your quick support! I changed all the URIs to absolute URIs (full file path in format "file:///C:/path/to/file/ds-ng-1.ttl") and now it works - in windows cmd, as well as in Java code.
My question is, is this the only way for me to execute this kind of queries, or is there a solution which makes me able to use the "relative" URIs in cases like this one? Is there any fix to force the program to expand the URI or whatever - simply, for me, to be able to use these features like it is being used in the tutorial? Just because this : sparql.bat --graph dft.ttl --namedgraph 1.ttl --namedgraph 2.ttl --query q.rq is much more compact and tidy like this one: sparql.bat --graph dft.ttl --namedgraph file:///C:/very/long/and/awful/path/to/file/1.ttl --namedgraph file:///C:/very/long/and/awful/path/to/file/2.ttl --query q.rq Thank you in advance. Michal 2018-07-09 22:42 GMT+02:00 Andy Seaborne <[email protected]>: > Michal, > > It looks like the use of "--namedgraph" isn't expanding the URI > > In "--namedgraph ds-ng-1.ttl", "ds-ng-1.ttl" isn't an absolute URI and it > isn't being expanded. If it had, it would be file:///whatever/ds-ng-1.ttl > and because <.> is really <file:///whatever/> it would be abbreviated. > > A work aroung is to use file://$PWD/ds-ng-1.ttl (Linux, MacOS) or the > Windows equivalent. > > When a query is parsed, GRAPH :ds-ng-1.ttl is expanded. > > You might find it helpful to try the queries without "PREFIX : <.>" so > the full URIs are printed. > > If you get FILE in the --namedgraph FILE to be the absolute URI (same > characters) then the abbreviation should work. > > Andy > > > On 08/07/18 22:57, michal.r.256 wrote: > >> Good evening, >> I am trying to get through the tutorial (I am beginner) and I am >> experiencing unexpected behavior of these queries (even if Im copypasting >> the tutorials): >> Here is the link to referenced tutorial page: >> https://jena.apache.org/tutorials/sparql_datasets.html >> >> First attempt, this query works fine: >> >> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> >> PREFIX dc: <http://purl.org/dc/elements/1.1/> >> PREFIX : <.> >> >> SELECT * >> { ?s ?p ?o } >> >> Results: >> >> ---------------------------------------------------------------------- >> | s | p | o | >> ====================================================================== >> | :ds-ng-2.ttl | dc:date | "2005-09-22T05:53:05+01:00"^^xsd:dateTime | >> | :ds-ng-1.ttl | dc:date | "2005-07-14T03:18:56+01:00"^^xsd:dateTime | >> ---------------------------------------------------------------------- >> >> Second, this works pretty good too: >> >> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> >> PREFIX dc: <http://purl.org/dc/elements/1.1/> >> PREFIX : <.> >> >> SELECT * >> { >> { ?s ?p ?o } UNION { GRAPH ?g { ?s ?p ?o } } >> } >> >> Results not absolutely the same (the referenced named graph names are not >> exactly the same in the first and the third column (the colon missing and >> the <> instead), and I was not able to change this, although I was trying >> pretty hard as I thought that there could be the cause of my issue) >> >> ------------------------------------------------------------ >> --------------------------------- >> | s | p | o | >> g | >> ============================================================ >> ================================= >> | :ds-ng-2.ttl | dc:date | "2005-09-22T05:53:05+01:00"^^xsd:dateTime | >> | >> | :ds-ng-1.ttl | dc:date | "2005-07-14T03:18:56+01:00"^^xsd:dateTime | >> | >> | _:b0 | dc:title | "Harry Potter and the Chamber of Secrets" | >> <ds-ng-1.ttl> | >> | _:b1 | dc:title | "Harry Potter and the Philospher's Stone" | >> <ds-ng-1.ttl> | >> | _:b2 | dc:title | "Harry Potter and the Sorcerer's Stone" | >> <ds-ng-2.ttl> | >> | _:b3 | dc:title | "Harry Potter and the Chamber of Secrets" | >> <ds-ng-2.ttl> | >> ------------------------------------------------------------ >> --------------------------------- >> >> Now, this query is the first that doesnt work at all: >> >> PREFIX dc: <http://purl.org/dc/elements/1.1/> >> PREFIX : <.> >> >> SELECT ?title >> { >> GRAPH :ds-ng-2.ttl >> { ?b dc:title ?title } >> } >> >> Results are blank all the time: >> --------- >> | title | >> ========= >> --------- >> >> Same result with this query: >> >> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> >> PREFIX dc: <http://purl.org/dc/elements/1.1/> >> PREFIX : <.> >> >> SELECT ?date ?title >> { >> ?g dc:date ?date . FILTER (?date > "2005-08-01T00:00:00Z"^^xsd:dateTime >> ) >> GRAPH ?g >> { ?b dc:title ?title } >> } >> >> I have tried many things I googled out (but no exact solution for this >> problem) and nothing worked, I have no idea what could be wrong. >> >> Thanks for every support. >> >>
