The fact that one can use Jena's command line tool 'riot' to convert formats is perfectly true. A separate question was asked.
--- A. Soroka The University of Virginia Library > On Aug 23, 2016, at 3:34 AM, Lorenz Buehmann > <[email protected]> wrote: > > That does not solve the issue, the values are still string, not URIs resp. > RDF resources. The whole XSLT transformation has to be done again. > > > On 22.08.2016 13:36, A. Soroka wrote: >> You can use Jena's command line tool 'riot' to convert: >> >> https://jena.apache.org/documentation/io/#command-line-tools >> >> --- >> A. Soroka >> The University of Virginia Library >> >>> On Aug 22, 2016, at 4:54 AM, lookman sanni <[email protected]> wrote: >>> >>> Awesome ! >>> >>> The reason why I am using XML/RDF is that I have an input of >>> thousands/millions of lines in either CSV or XML. I chose XML, and >>> converted the XML to RDF/XML through XSLT. I can after that read the >>> RDF/XML either in memory or via TDB. Any chance I could be using TTL ? If >>> yes, I would be interested in learning how. >>> >>> Thank you. >>> >>> >>> >>> On Mon, Aug 22, 2016 at 10:20 AM, Dave Reynolds <[email protected]> >>> wrote: >>> >>>> Hi, >>>> >>>> The problem is with your RDF file. You have given the values of the >>>> aa:processedIn properties as strings instead of resources. To see this >>>> serialize as ttl. Better still, only use ttl and ignore rdf/xml! >>>> >>>> Using a corrected RDF file: >>>> >>>> <?xml version="1.0" encoding="UTF-8"?> >>>> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; >>>> xmlns:aa="http://www.abcd.org/ofdf#"; xmlns:owl="http://www.w3.org/2 >>>> 002/07/owl#" xmlns:html="http://www.w3.org/1999/xhtml"; xmlns:rdfs=" >>>> http://www.w3.org/2000/01/rdf-schema#";> >>>> <owl:Class rdf:about="http://www.abcd.org/ofdf#folder";> >>>> </owl:Class> >>>> <owl:Class rdf:about="http://www.abcd.org/ofdf#file";> >>>> </owl:Class> >>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#folder/001";> >>>> <aa:createdBy>MisterX</aa:createdBy> >>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#folder"/> >>>> </rdf:Description> >>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#file/AAA";> >>>> <aa:processedIn rdf:resource="http://www.abcd.org/ofdf#folder/001"; /> >>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#file"/> >>>> </rdf:Description> >>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#folder/002";> >>>> <aa:createdBy>MisterY</aa:createdBy> >>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#folder"/> >>>> </rdf:Description> >>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#file/AAA";> >>>> <aa:processedIn rdf:resource="http://www.abcd.org/ofdf#folder/002"; /> >>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#file"/> >>>> </rdf:Description> >>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#file/BBB";> >>>> <aa:processedIn>http://www.abcd.org/ofdf#folder/002</aa:processedIn> >>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#file"/> >>>> </rdf:Description> >>>> </rdf:RDF> >>>> >>>> and using your rule definitions then the ruleX fires fine and the >>>> resulting InfModel is: >>>> >>>> @prefix aa: <http://www.abcd.org/ofdf#> . >>>> @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . >>>> @prefix owl: <http://www.w3.org/2002/07/owl#> . >>>> @prefix html: <http://www.w3.org/1999/xhtml> . >>>> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . >>>> >>>> <http://www.abcd.org/ofdf#file/AAA> >>>> a aa:fileRequiringConflictCheck , >>>> aa:fileInManyFolders , aa:file ; >>>> aa:processedIn <http://www.abcd.org/ofdf#folder/002> , < >>>> http://www.abcd.org/ofdf#folder/001> . >>>> >>>> aa:file a owl:Class . >>>> >>>> <http://www.abcd.org/ofdf#file/BBB> >>>> a aa:file ; >>>> aa:processedIn "http://www.abcd.org/ofdf#folder/002"; . >>>> >>>> <http://www.abcd.org/ofdf#folder/002> >>>> a aa:folder ; >>>> aa:createdBy "MisterY" . >>>> >>>> aa:folder a owl:Class . >>>> >>>> <http://www.abcd.org/ofdf#folder/001> >>>> a aa:folder ; >>>> aa:createdBy "MisterX" . >>>> >>>> >>>> Dave >>>> >>>> >>>> On 21/08/16 19:34, lookman sanni wrote: >>>> >>>>> Ok Dave. Here is a minimal example: >>>>> >>>>> >>>>> *Java Code* >>>>> String rdfPath = "dataset/rdf/sample.rdf"; >>>>> String inRuleBase = "rules/sampleRule.txt"; >>>>> Model model = ModelFactory.createDefaultModel(); >>>>> FileInputStream fis = new FileInputStream(rdfPath); >>>>> model.read(fis,"ticket"); >>>>> Reasoner reasoner = new GenericRuleReasoner( >>>>> Rule.rulesFromURL(inRuleBase)); >>>>> InfModel infModel = ModelFactory.createInfModel( reasoner, model ); >>>>> StmtIterator si = infModel.listStatements(); >>>>> while ( si.hasNext() ) >>>>> { >>>>> Statement stmt = si.nextStatement(); >>>>> Resource subject = stmt.getSubject(); >>>>> Property predicate = stmt.getPredicate(); >>>>> RDFNode object = stmt.getObject(); >>>>> System.out.println(subject.toString() + " " + predicate.toString() + " " >>>>> + >>>>> object.toString()); >>>>> } >>>>> >>>>> *RDF File** (sample.rdf)* >>>>> >>>>> >>>>> <?xml version="1.0" encoding="UTF-8"?> >>>>> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; >>>>> xmlns:aa=" >>>>> http://www.abcd.org/ofdf#"; xmlns:owl="http://www.w3.org/2002/07/owl#"; >>>>> xmlns:html="http://www.w3.org/1999/xhtml"; xmlns:rdfs=" >>>>> http://www.w3.org/2000/01/rdf-schema#";> >>>>> <owl:Class rdf:about="http://www.abcd.org/ofdf#folder";> >>>>> </owl:Class> >>>>> <owl:Class rdf:about="http://www.abcd.org/ofdf#file";> >>>>> </owl:Class> >>>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#folder/001";> >>>>> <aa:createdBy>MisterX</aa:createdBy> >>>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#folder"/> >>>>> </rdf:Description> >>>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#file/AAA";> >>>>> <aa:processedIn>http://www.abcd.org/ofdf#folder/001</aa:processedIn> >>>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#file"/> >>>>> </rdf:Description> >>>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#folder/002";> >>>>> <aa:createdBy>MisterY</aa:createdBy> >>>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#folder"/> >>>>> </rdf:Description> >>>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#file/AAA";> >>>>> <aa:processedIn>http://www.abcd.org/ofdf#folder/002</aa:processedIn> >>>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#file"/> >>>>> </rdf:Description> >>>>> <rdf:Description rdf:about="http://www.abcd.org/ofdf#file/BBB";> >>>>> <aa:processedIn>http://www.abcd.org/ofdf#folder/002</aa:processedIn> >>>>> <rdf:type rdf:resource="http://www.abcd.org/ofdf#file"/> >>>>> </rdf:Description> >>>>> </rdf:RDF> >>>>> >>>>> >>>>> *Rule** (**sampleRule.txt)* >>>>> >>>>> @prefix aa: <http://www.abcd.org/ofdf#>. >>>>> >>>>> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>. >>>>> >>>>> @prefix owl: <http://www.w3.org/2002/07/owl#>. >>>>> >>>>> @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>. >>>>> >>>>> @prefix owl: <http://www.w3.org/2002/07/owl#>. >>>>> >>>>> >>>>> [ruleX: >>>>> >>>>> (?file1 aa:processedIn ?fld1) >>>>> >>>>> (?file1 aa:processedIn ?fld2) >>>>> >>>>> notEqual(?fld1, ?fld2) >>>>> >>>>> (?fld1 aa:createdBy ?auth1) >>>>> >>>>> (?fld2 aa:createdBy ?auth2) >>>>> >>>>> notEqual(?auth1, ?auth2) >>>>> >>>>> -> >>>>> >>>>> (?file1 rdf:type aa:fileRequiringConflictCheck) >>>>> >>>>> ] >>>>> >>>>> [ruleY: >>>>> (?file1 aa:processedIn ?fld1) >>>>> (?file1 aa:processedIn ?fld2) >>>>> notEqual(?fld1, ?fld2) >>>>> -> >>>>> (?file1 rdf:type aa:fileInManyFolders) >>>>> ] >>>>> >>>>> >>>>> RuleY is properly recognized and I can see the following statement added >>>>> to >>>>> the Inference model: >>>>> *http://www.abcd.org/ofdf#file/AAA <http://www.abcd.org/ofdf#file/AAA> >>>>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type >>>>> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> >>>>> http://www.abcd.org/ofdf#fileInManyFolders >>>>> <http://www.abcd.org/ofdf#fileInManyFolders>* >>>>> >>>>> >>>>> Nothing however for ruleX and this is what I struggle with. Thanks in >>>>> advance for the help. >>>>> >>>>> On Sun, Aug 21, 2016 at 3:44 PM, Dave Reynolds <[email protected] >>>>> wrote: >>>>> >>>>> On 21/08/16 12:37, lookman sanni wrote: >>>>>> Hi all, >>>>>>> I am struggling with the definition of jena rules. I have an RDF file >>>>>>> where >>>>>>> I am defining: >>>>>>> >>>>>>> - a "folder" class with a property "createdBy" >>>>>>> - a "file" class with a property "processedIn" of type "folder" >>>>>>> >>>>>>> My RDF file contains resources from the two classes. I am trying to >>>>>>> define >>>>>>> a Jena rule for querying files appearing in more than a folder, having >>>>>>> different authors. >>>>>>> >>>>>>> To that end, I added to my RDF the specification of a class >>>>>>> "fileRequiringConflictCheck" a subclass of the class "file" and then >>>>>>> specified the following jena rule: >>>>>>> >>>>>>> [ruleX: >>>>>>> (?file1 aa:processedIn ?fld2) >>>>>>> (?file1 aa:processedIn ?fld1) >>>>>>> notEqual(?fld1, ?fld2) >>>>>>> (?fld1 aa:createdBy ?auth1) >>>>>>> (?fld2 aa:createdBy ?auth2) >>>>>>> notEqual(?auth1, ?auth2) >>>>>>> -> >>>>>>> (?file1 rdf:type aa:fileRequiringConflictCheck) >>>>>>> ] >>>>>>> >>>>>>> Outcome is that the rule is likely never met whenever expected as per my >>>>>>> sample dataset. Any idea what I might be missing ? >>>>>>> >>>>>>> >>>>>> Looks reasonable, check your namespaces are correct. If you can't get it >>>>>> working then post a minimal example of the data and someone might be able >>>>>> to spot the problem. >>>>>> >>>>>> Dave >>>>>> >>>>>> >>>>>> >>>>> >>> >>> -- >>> Best Regards >>> >>> Lookman SANNI >> >
