Hi A general way of extracting parts of an RDF file into a new file is to use Jena to:
- Load the file into a model - Run a CONSTRUCT SPARQL query - The query returns a new model - Write the new model to file Dbpedia has a sparql endpoint, so if you need to query dbpedia from your own SPARQL query, you can use the SERVICE keyword. If you are unfamiliar with the CONSTRUCT or SERVICE keywords, then look at these - http://www.w3.org/TR/sparql11-query/ - http://www.w3.org/TR/2013/REC-sparql11-federated-query-20130321/ Regards, Håvard M. Ottestad > On 20 Aug 2016, at 09:51, neha gupta <[email protected]> wrote: > > Hello Soroka thanks for your reply. > > Actually I know these basics. I have read the owl file in Jena, run SPARQL, > execute it and display the question/answers(required output). > > What I need is to download/show the rdfs:comment or rdfs:abstract of the > ten resources(ten cities of Europe Berlin, London) from dbpedia in a > page/document . > > Can I do it if I hard code them in the rdfs:comment in Protege with each > question and display it along the answer of the question? > >> On Fri, Aug 19, 2016 at 11:58 AM, A. Soroka <[email protected]> wrote: >> >> If you have not written any Jena code than you should begin with the >> tutorials provided exactly for that purpose: >> >> https://jena.apache.org/getting_started/index.html >> >> --- >> A. Soroka >> The University of Virginia Library >> >>> On Aug 19, 2016, at 2:49 PM, neha gupta <[email protected]> wrote: >>> >>> Dear Soroka, I do not know how to use Gist etc but if this mailing list >>> support attachment , I can attach the owl file.. Jena code, I did not try >>> it because I am totally clueless how can I do it? >>> >>> In one statement, my question is can I get rdfs:comments of , say ten >>> resources, of dbpedia using Jena methods? >>> Thanks. >>> >>>> On Fri, Aug 19, 2016 at 7:42 AM, A. Soroka <[email protected]> wrote: >>>> >>>> No, please provide _actual data_. You are describing your data in words. >>>> That is not helpful. Make your OWL data available somewhere using a >> service >>>> like Gist or at the very least, include an excerpt. Also please include >> the >>>> code you have written so far. >>>> >>>> --- >>>> A. Soroka >>>> The University of Virginia Library >>>> >>>>> On Aug 19, 2016, at 10:34 AM, neha gupta <[email protected]> >> wrote: >>>>> >>>>> I am working on undergrad project. The detail is I have owl file where >> I >>>>> included ten questions about European cities like Born city belongs to >>>>> which country? The resources/answers are imported from dbpedia in >> Protege >>>>> Individual tab. I then used Jena API. The questions/answers work fine. >>>>> >>>>> The point where I have problem is I want a document/file etc where I >>>>> include the rdfs:comments or rdfs:abstract of these cities so that the >>>>> users knows about the resources. >>>>> >>>>> I mean when users finishes all the ten questions, at the end he/she >> gets >>>>> rdfs:comment details about these resources in a document or so.If this >> is >>>>> not possible, then please suggest me some soloutions which is near to >> it. >>>>> >>>>> I hope I conveyed my message? >>>>> >>>>>> On Fri, Aug 19, 2016 at 7:12 AM, A. Soroka <[email protected]> wrote: >>>>>> >>>>>> Please give us an actual example with data and your attempts at code. >> As >>>>>> for "dereferencing": >>>>>> >>>>>> https://www.w3.org/wiki/DereferenceURI >>>>>> >>>>>> --- >>>>>> A. Soroka >>>>>> The University of Virginia Library >>>>>> >>>>>>> On Aug 19, 2016, at 4:36 AM, neha gupta <[email protected]> >>>> wrote: >>>>>>> >>>>>>> I want the rdfs:comment of European capital cities in one file using >>>>>> Jena. >>>>>>> While studied a lot about it, I still have no idea how to do this. I >>>> can >>>>>> do >>>>>>> it of individual resource using Virtuoso but combining these into one >>>>>> file >>>>>>> using Jena is currently beyond my knowledge. >>>>>>> Also what is Dereference URI to RDF? >>>>>>> >>>>>>> Kindly if some one can help me here. >> >>
