Can you please share the output of the general query? Jjust that we can
see whether the triples have been loaded into a named graph or something
which ta least is not the default graph.
> Hi Lorenz,
>
> What I meant by Andy's query statement working is that it returned all the 11
> triples of my turtle file. His suggested query contained a union of graph
> within the SELECT statement.
>
> SELECT * { { ?s ?p ?o } UNION { GRAPH ?g {?s ?p ?o } } }
>
> Next, I tried the OWL version of the same file both in OWL and RDF/XML format
> with the query statement:
>
> prefix owl: <http://www.w3.org/2002/07/owl#>
> prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>
> SELECT DISTINCT ?class ?label ?description
> WHERE {
> ?class a owl:Class.
> OPTIONAL { ?class rdfs:label ?label}
> OPTIONAL { ?class rdfs:comment ?description}
> }
> LIMIT 25
>
> This did not return the query result as I expected it to return the only
> class it contained.
>
> Perhaps this clarifies it better. I also tried to simply the query (below)
> but no results.
>
> SELECT DISTINCT ?c
> WHERE {
> ?c a owl:Class.
> }
>
> Any suggestions, I'll appreciate.
> Regards
>
> Mahmood
> -----Original Message-----
> From: Lorenz B. [mailto:[email protected]]
> Sent: 20 October 2016 08:52
> To: [email protected]
> Subject: Re: Fuseki 2.4.0 web user interface
>
> Hello Mahmood,
>
> you said the general query from Andy "works" and now you say that there was
> no output. If this query doesn't return anything, your triple store is empty.
>
>
> ,
> Lorenz
>
>> There was no output at all through the general query.
>>
>> Now I am working with an OWL file and get all the concepts (It has only one
>> concept). The query I am running is:
>>
>> prefix owl: <http://www.w3.org/2002/07/owl#> prefix rdfs:
>> <http://www.w3.org/2000/01/rdf-schema#>
>>
>> SELECT DISTINCT ?class ?label ?description WHERE {
>> ?class a owl:Class.
>> OPTIONAL { ?class rdfs:label ?label}
>> OPTIONAL { ?class rdfs:comment ?description} } LIMIT 25
>>
>> The OWL file is uploaded successfully but there is no result of the query.
>>
>> Any thoughts, I'll appreciate.
>>
>> Regards
>>
>> -----Original Message-----
>> From: Andy Seaborne [mailto:[email protected]]
>> Sent: 19 October 2016 15:55
>> To: [email protected]
>> Subject: Re: Fuseki 2.4.0 web user interface
>>
>>
>>
>> On 19/10/16 15:44, Mahmood Ahmad wrote:
>>> Ah, your query works!
>>>
>>> I had just missed a '}' character in the end.
>>>
>>> Thanks Andy, but why did my query not work. It was:
>>>
>>> SELECT ?subject ?predicate ?object
>>> WHERE {
>>> ?subject ?predicate ?object
>>> }
>>> LIMIT 25
>> Please note that I can't see your screen so I can't see what the output to
>> the general query was.
>>
>> But I guess it has the G column set. Named graph not default graph.
>>
>>
>>> Regards
>>>
>>> -----Original Message-----
>>> From: Andy Seaborne [mailto:[email protected]]
>>> Sent: 19 October 2016 15:25
>>> To: [email protected]
>>> Subject: Re: Fuseki 2.4.0 web user interface
>>>
>>> The list does not pass attachments through.
>>>
>>> How are you runnign the server exactly?
>>>
>>>
>>> Ask this query:
>>>
>>> SELECT * { { ?s ?p ?o } UNION { GRAPH ?g {?s ?p ?o } } }
>>>
>>> and don't forget to press the "query" button (it caches results otherwise).
>>>
>>> Andy
>>>
>>>
>>>
>>> On 19/10/16 14:23, Mahmood Ahmad wrote:
>>>> Andy,
>>>>
>>>> I used a simple ulo.ttl file (owl file converted to ttl format) to
>>>> upload on dataset /ds (Fuseki 2.4.0) and ran a simple query to get
>>>> all triples. The file uploaded correctly but generated no result in
>>>> query results portion of the Fuseki v2.4.0 web UI, although there
>>>> are
>>>> 11 triples in ulo.ttl
>>>>
>>>> The ttl file is attached. There was no result from the execution of query,
>>>> nor a message of success/failure.
>>>>
>>>> Please can you suggest something so that I could get some output from the
>>>> query?
>>>>
>>>> Regards
>>>> Mahmood
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Andy Seaborne [mailto:[email protected]]
>>>> Sent: 19 October 2016 13:57
>>>> To: [email protected]
>>>> Subject: Re: Fuseki 2.4.0 web user interface
>>>>
>>>> Note what it says at the top of the page:
>>>>
>>>> """
>>>> This page covers Fuseki v1. As of Jena 2.13.0, there is also a new
>>>> version, Fuseki v2. See Fuseki2 documentation. Both Fuseki v1 and
>>>> Fuseki
>>>> v2 are currently active and maintained.
>>>> """
>>>>
>>>> You are looking at Fuseki1 documentation.
>>>>
>>>> Andy
>>>>
>>>> On 19/10/16 13:54, Andy Seaborne wrote:
>>>>> It is looking for a file called tdb.ttl which is not found.
>>>>>
>>>>> --desc is for a assembler file - you have to provide that, the
>>>>> documentation is out of date.
>>>>>
>>>>> If all you eant is some small data for experimentation:
>>>>>
>>>>> fuseki-server --file <YourData.ttl> /ds
>>>>>
>>>>> will work
>>>>>
>>>>> If you have a TDB database,
>>>>>
>>>>> fuseki-server --loc <YourDB> /ds
>>>>>
>>>>> Andy
>>>>>
>>>>> On 19/10/16 12:39, Mahmood Ahmad wrote:
>>>>>> Hi,
>>>>>>
>>>>>> [I am using Apache Jena Fuseki 2.4.0 on a Windows 10 machine]
>>>>>>
>>>>>> Can anyone please point me to the tdb.ttl for running a few
>>>>>> practice SPARQL queries? The Apache Jena says that TDB is a part
>>>>>> of Apache Jena
>>>>>> 3.1.0 on the following page:
>>>>>>
>>>>>> http://jena.apache.org/documentation/tdb/index.html
>>>>>>
>>>>>> I have installed Fuseki 2.4.0 and I am looking to run the Fuseki
>>>>>> Server with tdb.ttl using the command:
>>>>>> fuseki-server --desc tdb.ttl /ds
>>>>>>
>>>>>> as given on the page:
>>>>>> https://jena.apache.org/documentation/serving_data/
>>>>>>
>>>>>> The error I get is as follows:
>>>>>>
>>>>>> C:\Users\mahmo_myz922s\apache-jena-fuseki-2.4.0\apache-jena-fuseki-2.
>>>>>> 4.0>fuseki-server
>>>>>> --desc tdb.ttl /ds
>>>>>> [2016-10-19 12:14:49] Server INFO Dataset from assembler
>>>>>> org.apache.jena.sparql.ARQException: Failed reading assembler
>>>>>> description: Not found: tdb.ttl
>>>>>> at
>>>>>> org.apache.jena.sparql.core.assembler.AssemblerUtils.readAssembler
>>>>>> F
>>>>>> i
>>>>>> l
>>>>>> e(AssemblerUtils.java:91)
>>>>>>
>>>>>> at
>>>>>> org.apache.jena.sparql.core.assembler.AssemblerUtils.build(Assembl
>>>>>> e
>>>>>> r
>>>>>> U
>>>>>> tils.java:104)
>>>>>>
>>>>>> at arq.cmdline.ModAssembler.create(ModAssembler.java:72)
>>>>>> at
>>>>>> arq.cmdline.ModDatasetAssembler.createDataset(ModDatasetAssembler.
>>>>>> j
>>>>>> a
>>>>>> v
>>>>>> a:43)
>>>>>>
>>>>>> at
>>>>>> org.apache.jena.fuseki.cmd.FusekiCmd$FusekiCmdInner.processModules
>>>>>> A
>>>>>> n
>>>>>> d
>>>>>> Args(FusekiCmd.java:284)
>>>>>>
>>>>>> at jena.cmd.CmdArgModule.process(CmdArgModule.java:52)
>>>>>> at jena.cmd.CmdMain.mainMethod(CmdMain.java:92)
>>>>>> at jena.cmd.CmdMain.mainRun(CmdMain.java:58)
>>>>>> at jena.cmd.CmdMain.mainRun(CmdMain.java:45)
>>>>>> at
>>>>>> org.apache.jena.fuseki.cmd.FusekiCmd$FusekiCmdInner.innerMain(Fuse
>>>>>> k
>>>>>> i
>>>>>> C
>>>>>> md.java:102)
>>>>>>
>>>>>> at
>>>>>> org.apache.jena.fuseki.cmd.FusekiCmd.main(FusekiCmd.java:67)
>>>>>>
>>>>>> Any ideas, I'll appreciate.
>>>>>>
>>>>>> Regards
>>>>>> Mahmood
>>>>>>
>>>>>> Mahmood Ahmad, PhD
>>>>>> (Semantic Information Architect)
>>>>>>
> --
> Lorenz Bühmann
> AKSW group, University of Leipzig
> Group: http://aksw.org - semantic web research center
>
>
>
--
Lorenz Bühmann
AKSW group, University of Leipzig
Group: http://aksw.org - semantic web research center
